Merge pull request youngyangyang04#451 from flames519/master

背包问题
nowsoar · Jul 1, 2021 · 0f38eb9 · 0f38eb9
2 parents 1097fb5 + 204c0c5
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diff --git a/problems/0416.分割等和子集.md b/problems/0416.分割等和子集.md
@@ -240,6 +240,26 @@ class Solution:
 Go：
 
 
+javaScript: 
+
+```js
+var canPartition = function(nums) {
+    const sum = (nums.reduce((p, v) => p + v));
+    if (sum & 1) return false;
+    const dp = Array(sum / 2 + 1).fill(0);
+    for(let i = 0; i < nums.length; i++) {
+        for(let j = sum / 2; j >= nums[i]; j--) {
+            dp[j] = Math.max(dp[j], dp[j - nums[i]] + nums[i]);
+            if (dp[j] === sum / 2) {
+                return true;
+            }
+        }
+    }
+    return dp[sum / 2] === sum / 2;
+};
+```
+
+
 
 
 -----------------------

diff --git a/problems/背包理论基础01背包-1.md b/problems/背包理论基础01背包-1.md
@@ -380,6 +380,52 @@ func main() {
 }
 ```
 
+javaScript: 
+
+```js
+function testWeightBagProblem (wight, value, size) {
+  const len = wight.length, 
+    dp = Array.from({length: len + 1}).map(
+      () => Array(size + 1).fill(0)
+    );
+
+  for(let i = 1; i <= len; i++) {
+    for(let j = 0; j <= size; j++) {
+      if(wight[i - 1] <= j) {
+        dp[i][j] = Math.max(
+          dp[i - 1][j], 
+          value[i - 1] + dp[i - 1][j - wight[i - 1]]
+        )
+      } else {
+        dp[i][j] = dp[i - 1][j];
+      }
+    }
+  }
+
+//   console.table(dp);
+
+  return dp[len][size];
+}
+
+function testWeightBagProblem2 (wight, value, size) {
+  const len = wight.length, 
+    dp = Array(size + 1).fill(0);
+  for(let i = 1; i <= len; i++) {
+    for(let j = size; j >= wight[i - 1]; j--) {
+      dp[j] = Math.max(dp[j], value[i - 1] + dp[j - wight[i - 1]]);
+    }
+  }
+  return dp[size];
+}
+
+
+function test () {
+  console.log(testWeightBagProblem([1, 3, 4, 5], [15, 20, 30, 55], 6));
+}
+
+test();
+```
+
 -----------------------
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)
 * B站视频：[代码随想录](https://space.bilibili.com/525438321)

diff --git a/problems/背包理论基础01背包-2.md b/problems/背包理论基础01背包-2.md
@@ -294,6 +294,29 @@ func main() {
 }
 ```
 
+javaScript:
+
+```js
+
+function testWeightBagProblem(wight, value, size) {
+  const len = wight.length, 
+    dp = Array(size + 1).fill(0);
+  for(let i = 1; i <= len; i++) {
+    for(let j = size; j >= wight[i - 1]; j--) {
+      dp[j] = Math.max(dp[j], value[i - 1] + dp[j - wight[i - 1]]);
+    }
+  }
+  return dp[size];
+}
+
+
+function test () {
+  console.log(testWeightBagProblem([1, 3, 4, 5], [15, 20, 30, 55], 6));
+}
+
+test();
+```
+
 
 
 -----------------------