Merge pull request youngyangyang04#1492 from KingArthur0205/master

添加 1049.最后一块石头的重量II.md C语言解法

Author: youngyangyang04

problems/1049.最后一块石头的重量II.md

@@ -277,6 +277,37 @@ var lastStoneWeightII = function (stones) {
 };
 ```
 
+C版本
+```c
+#define MAX(a, b) (((a) > (b)) ? (a) : (b))
+
+int getSum(int *stones, int stoneSize) {
+    int sum = 0, i;
+    for (i = 0; i < stoneSize; ++i)
+        sum += stones[i];
+    return sum;
+}
+
+int lastStoneWeightII(int* stones, int stonesSize){
+    int sum = getSum(stones, stonesSize);
+    int target = sum / 2;
+    int i, j;
+
+    // 初始化dp数组
+    int *dp = (int*)malloc(sizeof(int) * (target + 1));
+    memset(dp, 0, sizeof(int) * (target + 1));
+    for (j = stones[0]; j <= target; ++j)
+        dp[j] = stones[0];
+    
+    // 递推公式：dp[j] = max(dp[j], dp[j - stones[i]] + stones[i])
+    for (i = 1; i < stonesSize; ++i) {
+        for (j = target; j >= stones[i]; --j)
+            dp[j] = MAX(dp[j], dp[j - stones[i]] + stones[i]);
+    }
+    return sum - dp[target] - dp[target];
+}
+```
+
 
 TypeScript版本