diff --git a/problems/0078.子集.md b/problems/0078.子集.md
index fb4a8740..747b89d1 100644
--- a/problems/0078.子集.md
+++ b/problems/0078.子集.md
@@ -263,6 +263,63 @@ var subsets = function(nums) {
 };
 ```
 
+C:
+```c
+int* path;
+int pathTop;
+int** ans;
+int ansTop;
+//记录二维数组中每个一维数组的长度
+int* length;
+//将当前path数组复制到ans中
+void copy() {
+    int* tempPath = (int*)malloc(sizeof(int) * pathTop);
+    int i;
+    for(i = 0; i < pathTop; i++) {
+        tempPath[i] = path[i];
+    }
+    ans = (int**)realloc(ans, sizeof(int*) * (ansTop+1));
+    length[ansTop] = pathTop;
+    ans[ansTop++] = tempPath;
+}
+
+void backTracking(int* nums, int numsSize, int startIndex) {
+    //收集子集，要放在终止添加的上面，否则会漏掉自己
+    copy();
+    //若startIndex大于数组大小，返回
+    if(startIndex >= numsSize) {
+        return;
+    }
+    int j;
+    for(j = startIndex; j < numsSize; j++) {
+        //将当前下标数字放入path中
+        path[pathTop++] = nums[j];
+        backTracking(nums, numsSize, j+1);
+        //回溯
+        pathTop--;
+    }
+}
+
+int** subsets(int* nums, int numsSize, int* returnSize, int** returnColumnSizes){
+    //初始化辅助变量
+    path = (int*)malloc(sizeof(int) * numsSize);
+    ans = (int**)malloc(0);
+    length = (int*)malloc(sizeof(int) * 1500);
+    ansTop = pathTop = 0;
+    //进入回溯
+    backTracking(nums, numsSize, 0);
+    //设置二维数组中元素个数
+    *returnSize = ansTop;
+    //设置二维数组中每个一维数组的长度
+    *returnColumnSizes = (int*)malloc(sizeof(int) * ansTop);
+    int i;
+    for(i = 0; i < ansTop; i++) {
+        (*returnColumnSizes)[i] = length[i];
+    }
+    return ans;
+}
+```
+
 
 -----------------------
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)
diff --git a/problems/0455.分发饼干.md b/problems/0455.分发饼干.md
index 8e20c402..bae1566c 100644
--- a/problems/0455.分发饼干.md
+++ b/problems/0455.分发饼干.md
@@ -217,6 +217,29 @@ var findContentChildren = function(g, s) {
 
 ```
 
+C:
+```c
+int cmp(int* a, int* b) {
+    return *a - *b;
+}
+
+int findContentChildren(int* g, int gSize, int* s, int sSize){
+    if(sSize == 0)
+        return 0;
+    
+    //将两个数组排序为升序
+    qsort(g, gSize, sizeof(int), cmp);
+    qsort(s, sSize, sizeof(int), cmp);
+
+    int numFedChildren = 0;
+    int i = 0;
+    for(i = 0; i < sSize; ++i) {
+        if(numFedChildren < gSize && g[numFedChildren] <= s[i])
+            numFedChildren++;
+    }
+    return numFedChildren;
+}
+```
 
 -----------------------
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)