Update 494-target-sum.js

Author: everthis

494-target-sum.js

@@ -5,30 +5,25 @@
  */
 const findTargetSumWays = function(nums, target) {
     const sum = nums.reduce((a, b) => a+b);
-    
     if(Math.abs(target) > sum) {
         return 0;
     }
-
     if((target + sum) % 2) {
         return 0;
     }
-
-    const halfSum = (target + sum) / 2;
-
-    let dp = new Array(halfSum+1).fill(0);
+    const newTarget = (target + sum) / 2;
+    let dp = new Array(newTarget+1).fill(0);
     dp[0] = 1;
-
     for(let i = 0; i < nums.length; i++) {
-        for(let j = halfSum; j >= nums[i]; j--) {
+        for(let j = newTarget; j >= nums[i]; j--) {
             dp[j] += dp[j - nums[i]];
         }
     }
-
-    return dp[halfSum];
+    return dp[newTarget];
 };
 
 
+
 // another
 
 /**