add 2160 ts solution

JeremyXXXuuu · JeremyXXXuuu · commit 52daf33075f5 · 2023-02-13T10:01:00.000+01:00
diff --git a/Problems/16-Minimum-Sum-of-Four-Digit-Number-After-Splitting-Digits/2160.ts b/Problems/16-Minimum-Sum-of-Four-Digit-Number-After-Splitting-Digits/2160.ts
@@ -0,0 +1,38 @@
+    
+
+// minimum sum of any length of number.
+function minimumSum(num: number): number {
+    const str = num.toString().split('');
+    let digits = str.map(Number);
+    digits.sort((a,b)=>a-b);
+
+    for(let i = 0; i< digits.length; i++) {
+        if(digits[i] !== 0) {
+            digits = digits.slice(i)
+            break;
+        }
+    }
+    let p1 = 0,p2 = 1;
+    let num1: number[] = [];
+    let num2: number[] = [];
+    while(digits[p1]) {
+        num1.push(digits[p1]);
+        if(p2 < digits.length){
+            num2.push(digits[p2])
+        }
+        p1 += 2;
+        p2 += 2;
+    }
+    return Num(num1) + Num(num2);
+
+    function Num(digits: number[]): number {
+        let res : number = 0;
+        let len = digits.length-1;
+        for(let i = 0; i < digits.length; i++) {
+            res += Math.pow(10,len)* digits[i];
+            len --;
+        }
+        return res;
+    } 
+
+};
