diff --git "a/topic01/submit/LC0042_\351\231\210\346\230\237\350\260\225.cpp" "b/topic01/submit/LC0042_\351\231\210\346\230\237\350\260\225.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..0647d3eee47a9f559079c9f3cbaec6f53baaff3f
--- /dev/null
+++ "b/topic01/submit/LC0042_\351\231\210\346\230\237\350\260\225.cpp"
@@ -0,0 +1,27 @@
+class Solution {
+public:
+    int trap(vector<int>& height) {
+        int n = height.size();
+        if (n == 0) return 0;
+
+        vector<int> left_max(n);
+        vector<int> right_max(n);
+
+        left_max[0] = height[0];
+        for (int i = 1; i < n; i++) {
+            left_max[i] = max(left_max[i - 1], height[i]);
+        }
+
+        right_max[n - 1] = height[n - 1];
+        for (int i = n - 2; i >= 0; i--) {
+            right_max[i] = max(right_max[i + 1], height[i]);
+        }
+
+        int ans = 0;
+        for (int i = 0; i < n; i++) {
+            ans += min(left_max[i], right_max[i]) - height[i];
+        }
+
+        return ans;
+    }
+};
\ No newline at end of file
diff --git "a/topic01/submit/LC0496_\351\231\210\346\230\237\350\260\225.cpp" "b/topic01/submit/LC0496_\351\231\210\346\230\237\350\260\225.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..0d6c84e32b249d962bb07fc877aa90ff828a55f7
--- /dev/null
+++ "b/topic01/submit/LC0496_\351\231\210\346\230\237\350\260\225.cpp"
@@ -0,0 +1,26 @@
+class Solution {
+public:
+    vector<int> nextGreaterElement(vector<int>& nums1, vector<int>& nums2) {
+        unordered_map<int, int> nextGreater;
+        stack<int> st;
+
+        for (int num : nums2) {
+            while (!st.empty() && st.top() < num) {
+                nextGreater[st.top()] = num;
+                st.pop();
+            }
+            st.push(num);
+        }
+
+        while (!st.empty()) {
+            nextGreater[st.top()] = -1;
+            st.pop();
+        }
+
+        vector<int> ans;
+        for (int num : nums1) {
+            ans.push_back(nextGreater[num]);
+        }
+        return ans;
+    }
+};
\ No newline at end of file
diff --git "a/topic01/submit/LC0503_\351\231\210\346\230\237\350\260\225.cpp" "b/topic01/submit/LC0503_\351\231\210\346\230\237\350\260\225.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..7856ac3c821eb4674e5b1275e72152788220028e
--- /dev/null
+++ "b/topic01/submit/LC0503_\351\231\210\346\230\237\350\260\225.cpp"
@@ -0,0 +1,19 @@
+class Solution {
+public:
+    vector<int> nextGreaterElements(vector<int>& nums) {
+        int n = nums.size();
+        vector<int> res(n, -1);
+        stack<int> st;
+        for (int i = 0; i < 2 * n; i++) {
+            int idx = i % n;
+            while (!st.empty() && nums[st.top()] < nums[idx]) {
+                res[st.top()] = nums[idx];
+                st.pop();
+            }
+            if (i < n) {
+                st.push(i);
+            }
+        }
+        return res;
+    }
+};
\ No newline at end of file
diff --git "a/topic01/submit/LC0739_\351\231\210\346\230\237\350\260\225.cpp" "b/topic01/submit/LC0739_\351\231\210\346\230\237\350\260\225.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..b532071e266d30229e6ad0f87e82e8549e4f2982
--- /dev/null
+++ "b/topic01/submit/LC0739_\351\231\210\346\230\237\350\260\225.cpp"
@@ -0,0 +1,17 @@
+class Solution {
+public:
+    vector<int> dailyTemperatures(vector<int>& temperatures) {
+        int n = temperatures.size();
+        vector<int>ans(n, 0);
+        stack<int>st;
+        for (int i = 0; i < n; i++) {
+            while (!st.empty() && temperatures[i] > temperatures[st.top()]) {
+                int idx = st.top();
+                st.pop();
+                ans[idx] = i - idx;
+            }
+            st.push(i);
+        }
+        return ans;
+    }
+};
\ No newline at end of file
diff --git "a/topic01/submit/LC1944_\351\231\210\346\230\237\350\260\225.cpp" "b/topic01/submit/LC1944_\351\231\210\346\230\237\350\260\225.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..0ba4a94d5cd2a786bf84f9918fb987676a8ccffe
--- /dev/null
+++ "b/topic01/submit/LC1944_\351\231\210\346\230\237\350\260\225.cpp"
@@ -0,0 +1,21 @@
+class Solution {
+public:
+    vector<int> canSeePersonsCount(vector<int>& heights) {
+        int n = heights.size();
+        vector<int> ans(n, 0);
+        stack<int> st;
+        for (int i = n - 1; i >= 0; i--) {
+            int count = 0;
+            while (!st.empty() && heights[st.top()] < heights[i]) {
+                count++;
+                st.pop();
+            }
+            if (!st.empty()) {
+                count++;
+            }
+            ans[i] = count;
+            st.push(i);
+        }
+        return ans;
+    }
+};
\ No newline at end of file
diff --git "a/topic01/submit/LC1996_\351\231\210\346\230\237\350\260\225.cpp" "b/topic01/submit/LC1996_\351\231\210\346\230\237\350\260\225.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..e82326e5306d1cd93639aaa1b6c621682ee8de1a
--- /dev/null
+++ "b/topic01/submit/LC1996_\351\231\210\346\230\237\350\260\225.cpp"
@@ -0,0 +1,22 @@
+class Solution {
+public:
+    int numberOfWeakCharacters(vector<vector<int>>& properties) {
+        sort(properties.begin(), properties.end(), [](const vector<int>& a, const vector<int>& b) {
+            if (a[0] == b[0]) {
+                return a[1] > b[1];
+            }
+            return a[0] < b[0];
+            });
+        stack<int>st;
+        int count = 0;
+        for (const auto prop : properties) {
+            int defense = prop[1];
+            while (!st.empty() && st.top() < defense) {
+                st.pop();
+                count++;
+            }
+            st.push(defense);
+        }
+        return count;
+    }
+};
\ No newline at end of file