Create 416-partition-equal-subset-sum.js

Author: everthis

416-partition-equal-subset-sum.js

@@ -0,0 +1,36 @@
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+const canPartition = function(nums) {
+    let sum = 0
+    for(let num of nums) {
+      sum += num
+    }
+    
+    if(sum & 1 === 1) {
+       return false
+    }
+    
+    sum /= 2
+    let n = nums.length
+    const dp = Array.from(new Array(n+1), () => [])
+    for(let i = 0; i < dp.length; i++) {
+      dp[i] = new Array(sum+1).fill(false)
+    }
+    dp[0][0] = true
+    for(let i = 1; i < n + 1; i++) {
+      dp[i][0] = true
+    }
+    for(let j = 1; j < sum + 1; j++) {
+      dp[0][j] = false
+    }
+    for(let i = 1; i < n + 1; i++) {
+      for(let j = 1; j < sum + 1; j++) {
+        if(j >= nums[i - 1]) {
+          dp[i][j] = (dp[i -1][j] || dp[i - 1][j - nums[i - 1]])
+        }
+      }
+    }
+    return dp[n][sum]
+};