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feat: add solutions to lc problems: No.1480,1512,1672
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‎solution/1400-1499/1480.Running Sum of 1d Array/README.md

Lines changed: 39 additions & 1 deletion
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@@ -44,22 +44,60 @@
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<!-- 这里可写通用的实现逻辑 -->
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原地修改数组。
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<!-- tabs:start -->
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### **Python3**
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```python
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class Solution:
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def runningSum(self, nums: List[int]) -> List[int]:
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for i in range(1, len(nums)):
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nums[i] += nums[i - 1]
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return nums
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```
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### **Java**
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```java
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class Solution {
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public int[] runningSum(int[] nums) {
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for (int i = 1; i < nums.length; ++i) {
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nums[i] += nums[i - 1];
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}
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return nums;
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}
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}
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```
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### **C++**
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```cpp
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class Solution {
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public:
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vector<int> runningSum(vector<int>& nums) {
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for (int i = 1; i < nums.size(); ++i) {
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nums[i] += nums[i - 1];
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}
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return nums;
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}
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};
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```
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### **Go**
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```go
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func runningSum(nums []int) []int {
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for i := 1; i < len(nums); i++ {
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nums[i] += nums[i-1]
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}
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return nums
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}
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```
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### **...**

‎solution/1400-1499/1480.Running Sum of 1d Array/README_EN.md

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### **Python3**
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```python
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class Solution:
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def runningSum(self, nums: List[int]) -> List[int]:
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for i in range(1, len(nums)):
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nums[i] += nums[i - 1]
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return nums
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```
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### **Java**
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```java
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class Solution {
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public int[] runningSum(int[] nums) {
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for (int i = 1; i < nums.length; ++i) {
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nums[i] += nums[i - 1];
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}
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return nums;
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}
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}
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```
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### **C++**
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```cpp
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class Solution {
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public:
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vector<int> runningSum(vector<int>& nums) {
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for (int i = 1; i < nums.size(); ++i) {
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nums[i] += nums[i - 1];
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}
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return nums;
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}
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};
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```
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### **Go**
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```go
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func runningSum(nums []int) []int {
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for i := 1; i < len(nums); i++ {
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nums[i] += nums[i-1]
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}
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return nums
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}
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```
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### **...**

‎solution/1400-1499/1480.Running Sum of 1d Array/Solution.cpp

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class Solution {
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public:
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vector<int> runningSum(vector<int>& nums) {
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for (int i = 1; i < nums.size(); ++i) {
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nums[i] += nums[i - 1];
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}
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return nums;
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}
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};

‎solution/1400-1499/1480.Running Sum of 1d Array/Solution.go

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func runningSum(nums []int) []int {
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for i := 1; i < len(nums); i++ {
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nums[i] += nums[i-1]
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}
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return nums
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}

‎solution/1400-1499/1480.Running Sum of 1d Array/Solution.java

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class Solution {
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public int[] runningSum(int[] nums) {
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for (int i = 1; i < nums.length; ++i) {
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nums[i] += nums[i - 1];
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}
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return nums;
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}
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}

‎solution/1400-1499/1480.Running Sum of 1d Array/Solution.py

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class Solution:
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def runningSum(self, nums: List[int]) -> List[int]:
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for i in range(1, len(nums)):
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nums[i] += nums[i - 1]
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return nums

‎solution/1500-1599/1512.Number of Good Pairs/README.md

Lines changed: 51 additions & 1 deletion
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```python
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class Solution:
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def numIdenticalPairs(self, nums: List[int]) -> int:
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counter = collections.Counter(nums)
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return sum([x * (x - 1) for x in counter.values()]) >> 1
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```
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### **Java**
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```java
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class Solution {
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public int numIdenticalPairs(int[] nums) {
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Map<Integer, Integer> counter = new HashMap<>();
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for (int num : nums) {
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counter.put(num, counter.getOrDefault(num, 0) + 1);
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}
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int res = 0;
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for (int n : counter.values()) {
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res += n * (n - 1);
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}
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return res >> 1;
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}
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}
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```
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### **C++**
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```cpp
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class Solution {
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public:
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int numIdenticalPairs(vector<int>& nums) {
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unordered_map <int, int> counter;
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for (int num : nums) {
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++counter[num];
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}
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int res = 0;
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for (auto &[num, n] : counter) {
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res += n * (n - 1);
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}
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return res >> 1;
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}
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};
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```
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### **Go**
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```go
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func numIdenticalPairs(nums []int) int {
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counter := make(map[int]int)
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for _, num := range nums {
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counter[num]++
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}
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res := 0
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for _, n := range counter {
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res += n * (n - 1)
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}
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return res >> 1
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}
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```
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### **...**

‎solution/1500-1599/1512.Number of Good Pairs/README_EN.md

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@@ -82,13 +82,63 @@
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### **Python3**
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```python
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class Solution:
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def numIdenticalPairs(self, nums: List[int]) -> int:
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counter = collections.Counter(nums)
88+
return sum([x * (x - 1) for x in counter.values()]) >> 1
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```
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### **Java**
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```java
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class Solution {
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public int numIdenticalPairs(int[] nums) {
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Map<Integer, Integer> counter = new HashMap<>();
97+
for (int num : nums) {
98+
counter.put(num, counter.getOrDefault(num, 0) + 1);
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}
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int res = 0;
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for (int n : counter.values()) {
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res += n * (n - 1);
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}
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return res >> 1;
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}
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}
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```
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### **C++**
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```cpp
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class Solution {
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public:
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int numIdenticalPairs(vector<int>& nums) {
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unordered_map <int, int> counter;
116+
for (int num : nums) {
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++counter[num];
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}
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int res = 0;
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for (auto &[num, n] : counter) {
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res += n * (n - 1);
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}
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return res >> 1;
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}
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};
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```
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### **Go**
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```go
131+
func numIdenticalPairs(nums []int) int {
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counter := make(map[int]int)
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for _, num := range nums {
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counter[num]++
135+
}
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res := 0
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for _, n := range counter {
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res += n * (n - 1)
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}
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return res >> 1
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}
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```
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### **...**

‎solution/1500-1599/1512.Number of Good Pairs/Solution.cpp

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class Solution {
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public:
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int numIdenticalPairs(vector<int>& nums) {
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unordered_map <int, int> counter;
5+
for (int num : nums) {
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++counter[num];
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}
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int res = 0;
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for (auto &[num, n] : counter) {
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res += n * (n - 1);
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}
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return res >> 1;
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}
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};

‎solution/1500-1599/1512.Number of Good Pairs/Solution.go

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func numIdenticalPairs(nums []int) int {
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counter := make(map[int]int)
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for _, num := range nums {
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counter[num]++
5+
}
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res := 0
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for _, n := range counter {
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res += n * (n - 1)
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}
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return res >> 1
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}

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