diff --git "a/problems/0001.344円270円244円346円225円260円344円271円213円345円222円214円.md" "b/problems/0001.344円270円244円346円225円260円344円271円213円345円222円214円.md"
index 5bedd0a0af..bc618c1506 100644
--- "a/problems/0001.344円270円244円346円225円260円344円271円213円345円222円214円.md"
+++ "b/problems/0001.344円270円244円346円225円260円344円271円213円345円222円214円.md"
@@ -352,5 +352,86 @@ List<int> twoSum(List<int> nums, int target) {
 }
 ```
 
+C:
+```c
+
+
+/**
+ * Note: The returned array must be malloced, assume caller calls free().
+ */
+
+// leetcode 支持 ut_hash 函式庫
+
+ typedef struct {
+ int key;
+ int value;
+ UT_hash_handle hh; // make this structure hashable
+ } map;
+
+map* hashMap = NULL;
+
+ void hashMapAdd(int key, int value){
+ map* s;
+ // key already in the hash?
+ HASH_FIND_INT(hashMap, &key, s);
+ if(s == NULL){
+ s = (map*)malloc(sizeof(map));
+ s -> key = key;
+ HASH_ADD_INT(hashMap, key, s);
+ }
+ s -> value = value;
+ }
+
+map* hashMapFind(int key){
+ map* s;
+ // *s: output pointer
+ HASH_FIND_INT(hashMap, &key, s); 
+ return s;
+ }
+
+ void hashMapCleanup(){
+ map* cur, *tmp;
+ HASH_ITER(hh, hashMap, cur, tmp){
+ HASH_DEL(hashMap, cur);
+ free(cur);
+ }
+ }
+
+ void hashPrint(){
+ map* s;
+ for(s = hashMap; s != NULL; s=(map*)(s -> hh.next)){
+ printf("key %d, value %d\n", s -> key, s -> value);
+ }
+ }
+
+ 
+int* twoSum(int* nums, int numsSize, int target, int* returnSize){
+ int i, *ans;
+ // hash find result
+ map* hashMapRes; 
+ hashMap = NULL;
+ ans = malloc(sizeof(int) * 2);
+
+ for(i = 0; i < numsSize; i++){ + // key 代表 nums[i] 的值,value 代表所在 index; + hashMapAdd(nums[i], i); + } + + hashPrint(); + + for(i = 0; i < numsSize; i++){ + hashMapRes = hashMapFind(target - nums[i]); + if(hashMapRes && hashMapRes -> value != i){
+ ans[0] = i;
+ ans[1] = hashMapRes -> value ;
+ *returnSize = 2;
+ return ans;
+ }
+ }
+ 
+ hashMapCleanup();
+ return NULL;
+}
+```
 -----------------------
 <div> </img></div>
diff --git "a/problems/0019.345円210円240円351円231円244円351円223円276円350円241円250円347円232円204円345円200円222円346円225円260円347円254円254円N344円270円252円350円212円202円347円202円271円.md" "b/problems/0019.345円210円240円351円231円244円351円223円276円350円241円250円347円232円204円345円200円222円346円225円260円347円254円254円N344円270円252円350円212円202円347円202円271円.md"
index b9859968c3..f84e334e1f 100644
--- "a/problems/0019.345円210円240円351円231円244円351円223円276円350円241円250円347円232円204円345円200円222円346円225円260円347円254円254円N344円270円252円350円212円202円347円202円271円.md"
+++ "b/problems/0019.345円210円240円351円231円244円351円223円276円350円241円250円347円232円204円345円200円222円346円225円260円347円254円254円N344円270円252円350円212円202円347円202円271円.md"
@@ -75,7 +75,12 @@ public:
 fast = fast->next;
 slow = slow->next;
 }
- slow->next = slow->next->next;
+ slow->next = slow->next->next; 
+ 
+ // ListNode *tmp = slow->next; C++释放内存的逻辑
+ // slow->next = tmp->next;
+ // delete nth;
+ 
 return dummyHead->next;
 }
 };
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