diff --git a/Luogu/SmallerSmallerSmaller/P1241 括号序列.cpp b/Luogu/SmallerSmallerSmaller/P1241 括号序列.cpp
new file mode 100644
index 0000000..c6997e0
--- /dev/null
+++ b/Luogu/SmallerSmallerSmaller/P1241 括号序列.cpp	
@@ -0,0 +1,11 @@
+#include <iostream>
+#include <string>
+using namespace std;
+int main(){
+	string n;
+	cin >> n;
+	for(int i = 0; i < n.size(); i++){
+		
+	}
+	return 0;
+} 
diff --git a/Luogu/SmallerSmallerSmaller/P1996 约瑟夫问题/deque.cpp b/Luogu/SmallerSmallerSmaller/P1996 约瑟夫问题/deque.cpp
new file mode 100644
index 0000000..736f72f
--- /dev/null
+++ b/Luogu/SmallerSmallerSmaller/P1996 约瑟夫问题/deque.cpp	
@@ -0,0 +1,22 @@
+#include <iostream>
+#include <vector>
+using namespace std;
+
+int main() {
+    int n, m;
+    cin >> n >> m;
+    vector<int> a;
+    for (int i = 0; i < n; i++) {
+        a.push_back(i + 1);
+    }
+    
+    int idx = 0;
+    while (!a.empty()) {
+        idx = (idx + m - 1) % a.size();
+        cout << a[idx] << " ";
+        a.erase(a.begin() + idx);
+    }
+    cout << endl;
+    return 0;
+}
+
diff --git a/Luogu/SmallerSmallerSmaller/P3156 【深基15.例1】询问学号/map.cpp b/Luogu/SmallerSmallerSmaller/P3156 【深基15.例1】询问学号/map.cpp
new file mode 100644
index 0000000..ba43d7e
--- /dev/null
+++ b/Luogu/SmallerSmallerSmaller/P3156 【深基15.例1】询问学号/map.cpp	
@@ -0,0 +1,18 @@
+#include <iostream>
+#include <unordered_map>
+using namespace std;
+int main(){
+	unordered_map<int, int> a;
+	int n, m;
+    cin >> n >> m;
+    int tmp;
+    for(int i = 0; i < n; i++){
+        cin >> tmp;
+        a.emplace(make_pair(i + 1, tmp));
+    }
+    for(int i = 0; i < m; i++){
+        cin >> tmp;
+        cout << a.find(tmp)->second << endl;
+    }
+    return 0;
+}
diff --git a/Luogu/SmallerSmallerSmaller/P3156 【深基15.例1】询问学号/vector.cpp b/Luogu/SmallerSmallerSmaller/P3156 【深基15.例1】询问学号/vector.cpp
new file mode 100644
index 0000000..ac00129
--- /dev/null
+++ b/Luogu/SmallerSmallerSmaller/P3156 【深基15.例1】询问学号/vector.cpp	
@@ -0,0 +1,18 @@
+#include <vector>
+#include <iostream>
+using namespace std;
+int main(){
+    int n, m;
+    cin >> n >> m;
+    vector<int> a;
+    int tmp;
+    for(int i = 0; i < n; i++){
+        cin >> tmp;
+        a.push_back(tmp);
+    }
+    for(int i = 0; i < m; i++){
+        cin >> tmp;
+        cout << a[tmp + 1] << endl;
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/Luogu/SmallerSmallerSmaller/P4715 【深基16.例1】淘汰赛.cpp b/Luogu/SmallerSmallerSmaller/P4715 【深基16.例1】淘汰赛.cpp
new file mode 100644
index 0000000..2161b32
--- /dev/null
+++ b/Luogu/SmallerSmallerSmaller/P4715 【深基16.例1】淘汰赛.cpp	
@@ -0,0 +1,45 @@
+#include <iostream>
+#include <algorithm>
+#include <deque>
+#include <utility>
+using namespace std;
+struct node{
+	int element;
+	node* left;
+	node* right;
+};
+class tree{
+public:
+	node* root;
+	deque<pair<int, int>> player;
+	int playernum;
+	
+	tree(const deque<pair<int, int>>& x): player(x), playernum(player.size()){};
+	pair<int, int> winner(){
+		deque<pair<int, int>> tmp(player);
+		reverse(tmp.begin(), tmp.end());
+		for(int i = 0; i < 2 * playernum - 2; i += 2){
+			pair<int, int> m = tmp[i].second < tmp[i + 1].second ? tmp[i + 1] : tmp[i] ;
+			tmp.push_back(m);
+		}
+		return tmp.back();
+	}
+};
+
+int main(){
+	deque<pair<int, int>> m1, m2;
+	int n;
+	cin >> n;
+	int tmp;
+	for(int i = 0; i < pow(2, n - 1); i++){
+		cin >> tmp;
+		m1.push_back(make_pair(i + 1, tmp));
+	}
+	for(int i = pow(2, n - 1); i < pow(2, n); i++){
+		cin >> tmp;
+		m2.push_back(make_pair(i + 1, tmp));
+	}
+	tree t1(m1), t2(m2);
+	pair<int, int> m = t1.winner().second > t2.winner().second ? t2.winner() : t1.winner();
+	cout << m.first << endl;
+}
diff --git a/Luogu/SmallerSmallerSmaller/P4715 【深基16.例1】淘汰赛.exe b/Luogu/SmallerSmallerSmaller/P4715 【深基16.例1】淘汰赛.exe
new file mode 100644
index 0000000..33b2019
Binary files /dev/null and b/Luogu/SmallerSmallerSmaller/P4715 【深基16.例1】淘汰赛.exe differ