5 problems solved.

lintcoder · lintcoder · commit 9d2235329717 · 2024-10-04T20:08:10.000+08:00
diff --git a/src/3120.cpp b/src/3120.cpp
@@ -0,0 +1,30 @@
+int numberOfSpecialChars(string word) {
+        int num[26] = {0};
+        int ct = 0;
+        for (char c: word)
+        {
+            if (islower(c))
+            {
+                if (num[c-'a'] == 0)
+                    num[c-'a'] = 1;
+                if (num[c-'a'] == 2)
+                {
+                    num[c-'a'] = 3;
+                    ++ct;
+                }
+            }
+            else
+            {
+                char tmp = tolower(c);
+                if (num[tmp-'a'] == 0)
+                    num[tmp-'a'] = 2;
+                if (num[tmp-'a'] == 1)
+                {
+                    num[tmp-'a'] = 3;
+                    ++ct;
+                }
+            }
+        }
+
+        return ct;
+    }
diff --git a/src/3151.cpp b/src/3151.cpp
@@ -0,0 +1,10 @@
+bool isArraySpecial(vector<int>& nums) {
+        int n = nums.size();
+        for (int i = 0; i < n-1; ++i)
+        {
+            if ((nums[i]+nums[i+1]) % 2 == 0)
+                return false;
+        }
+
+        return true;
+    }
diff --git a/src/3168.cpp b/src/3168.cpp
@@ -0,0 +1,18 @@
+int minimumChairs(string s) {
+        int maxentry = 0, ct = 0;
+        for (auto c: s)
+        {
+            if (c == 'E')
+                ++ct;
+            else
+            {
+                if (ct > maxentry)
+                {
+                    maxentry = ct;
+                }
+                --ct;
+            }
+        }
+
+        return maxentry > ct ? maxentry : ct;
+    }
diff --git a/src/3184.cpp b/src/3184.cpp
@@ -0,0 +1,10 @@
+bool isArraySpecial(vector<int>& nums) {
+        int n = nums.size();
+        for (int i = 0; i < n-1; ++i)
+        {
+            if ((nums[i]+nums[i+1]) % 2 == 0)
+                return false;
+        }
+
+        return true;
+    }
diff --git a/src/3300.cpp b/src/3300.cpp
@@ -0,0 +1,16 @@
+int minElement(vector<int>& nums) {
+        int minval = 100;
+        for (int a: nums)
+        {
+            int tmp = 0;
+            while (a > 0)
+            {
+                tmp += a%10;
+                a /= 10;
+            }
+            if (tmp < minval)
+                minval = tmp;
+        }
+
+        return minval;
+    }
