diff --git a/2014冒泡排序.cpp b/2014冒泡排序.cpp
new file mode 100644
index 0000000..9a86eab
--- /dev/null
+++ b/2014冒泡排序.cpp
@@ -0,0 +1,32 @@
+#include<iostream>
+#include<string> 
+#include<vector>
+
+using namespace std;
+
+int main(){
+	int n,temp;
+	cin >> n;
+	vector<int> array;
+	
+    for (int i = 0; i < n; i++) {
+        cin >> temp;
+        array.push_back(temp);
+    }
+	
+    for (int i = 0; i < n; i++) {
+		for(int j = 0;j < n - 1;j++){
+			if(array[j] > array[j + 1]){
+				temp = array[j + 1];
+				array[j + 1] = array[j];
+				array[j] = temp;
+			}
+		}
+    }
+    
+    for(auto i: array){
+    	cout << i << " ";
+	}
+	
+	return 0;
+} 
diff --git a/2014矩形覆盖.cpp b/2014矩形覆盖.cpp
new file mode 100644
index 0000000..f33ed15
--- /dev/null
+++ b/2014矩形覆盖.cpp
@@ -0,0 +1,28 @@
+#include<iostream>
+#include<string> 
+#include<vector>
+
+using namespace std;
+
+int main(){
+	int m,n,a;
+	cin >> m >> n >> a;
+	
+	if(m%a == 0){
+		m = m/a;
+	}
+	else{
+		m = m/a + 1;
+	}
+	
+	if(n%a == 0){
+		n = n/a;
+	}
+	else{
+		n = n/a + 1;
+	}
+	
+	cout << m*n;
+	
+	return 0;
+} 
diff --git a/2014砍树修路.cpp b/2014砍树修路.cpp
new file mode 100644
index 0000000..feb0b23
--- /dev/null
+++ b/2014砍树修路.cpp
@@ -0,0 +1,31 @@
+#include<iostream>
+#include<vector>
+
+using namespace std;
+
+int main(){
+	int L;
+	cin >> L;
+	int n;
+	cin >> n;
+	int a,b; 
+	
+	vector<int> route(L + 1,1);
+	
+	for(int i = 0;i < n;i++){
+		cin >> a >> b;
+		for(int j = a;j <= b;j++){
+			route[j] = 0; 
+		}	
+	}
+	
+	int counter = 0;
+	
+	for(auto i:route){
+		counter += i;
+	}
+	
+	cout << counter;
+	
+	return 0;
+} 
diff --git a/2015元音处理.cpp b/2015元音处理.cpp
new file mode 100644
index 0000000..dd04f54
--- /dev/null
+++ b/2015元音处理.cpp
@@ -0,0 +1,28 @@
+#include<iostream>
+#include<string>
+#include<stdio.h>
+
+using namespace std;
+
+int main(){
+	string str;
+	cin >> str;
+	
+	for(auto i:str){
+		switch(i){
+			case 'a':case 'o':case 'e':case 'i':case 'u':
+			case 'A':case 'O':case 'E':case 'I':case 'U':
+				break;
+			default:
+				cout << '.';
+				if(i < 92){
+					printf("%c",i+32);
+				}
+				else{
+					printf("%c",i-32);
+				}
+		}
+	}
+	
+	return 0;
+} 
diff --git a/2015高精度乘法.cpp b/2015高精度乘法.cpp
new file mode 100644
index 0000000..bff99e5
--- /dev/null
+++ b/2015高精度乘法.cpp
@@ -0,0 +1,22 @@
+#include<iostream>
+#include<string> 
+#include<vector>
+
+using namespace std;
+
+int main(){
+	string str;
+	vector<int> num1,num2;
+	
+	cin >> str;
+	for(auto i:str){
+		num1.push_back(stoi(&i));
+	}
+	cin >> str;
+	for(auto i:str){
+		num2.push_back(stoi(&i));
+	}
+	
+	
+	return 0;
+} 
diff --git a/2016字符统计.cpp b/2016字符统计.cpp
new file mode 100644
index 0000000..54b2055
--- /dev/null
+++ b/2016字符统计.cpp
@@ -0,0 +1,28 @@
+#include<iostream>
+#include<string>
+
+using namespace std;
+
+int main(){
+	string str;
+	int counter_at = 0;
+	int counter_endl = 1;
+	while(1){
+		cin >> str;
+		
+		for(auto i = str.begin()+1;i != str.end();i++){
+			if((*(i-1) == 'a')&&(*i == 'a')){
+				counter_at++;
+			}
+		}
+		if(*(str.end()-1) == '.'){
+			break;
+		}
+		else{
+			counter_endl++;
+		}
+	}
+	cout << counter_at << endl << counter_endl << endl;
+	
+	return 0;
+} 
diff --git a/2016猜数字.cpp b/2016猜数字.cpp
new file mode 100644
index 0000000..21dd8eb
--- /dev/null
+++ b/2016猜数字.cpp
@@ -0,0 +1,31 @@
+#include<iostream>
+#include<string>
+
+using namespace std;
+
+int main(){
+	int max,target;
+	cin >> max >> target;
+	
+	int min = 1;
+	int guest = -1;
+	int counter = 0;
+	
+	while(1){
+		counter++;
+		guest = (max - min + 1)/2 + min;
+		//cout << counter << " " << guest << " "<< max << "~" << min << endl;
+
+		if(guest > target){
+			max = guest;	
+		} 
+		else if(guest < target){
+			min = guest;
+		}
+		else{
+			break;
+		}
+	}
+	cout << counter;
+	return 0;
+} 
diff --git a/2017成绩排名.cpp b/2017成绩排名.cpp
new file mode 100644
index 0000000..e147de2
--- /dev/null
+++ b/2017成绩排名.cpp
@@ -0,0 +1,32 @@
+#include<iostream>
+#include<set>
+#include<vector>
+
+using namespace std;
+
+int main(){
+	int n,temp;
+	vector<int> array;
+	
+	set<int,greater<int>> score;
+	cin >> n; 
+	
+	for(int i = 0;i < n;i++){
+		cin >> temp;
+		score.insert(temp);
+	}
+	
+	cin >> n;
+	temp = 1;
+	for(auto i = score.begin();i != score.end();i++){
+		if(*i != n){
+			temp++;
+		}
+		else{
+			cout << temp;
+			break;
+		}
+	}
+	
+	return 0;
+} 
diff --git a/2017数塔路径.cpp b/2017数塔路径.cpp
new file mode 100644
index 0000000..40eafeb
--- /dev/null
+++ b/2017数塔路径.cpp
@@ -0,0 +1,31 @@
+#include<iostream>
+#include<vector>
+#include<algorithm>
+
+using namespace std;
+
+int main(){
+	int n;
+	cin >> n;
+	
+	vector<vector<int>> tree(n);
+	
+	int temp;
+	for(int i = 0;i<n;i++){
+		for(int j = 0;j < i+1;j++){
+			cin >> temp;
+			tree[i].push_back(temp);
+		}
+	}
+	
+	vector<vector<int>> dp = tree;
+	
+	for(int i = n - 2;i >= 0;i--){
+		for(int j = i;j >= 0;j--){
+			dp[i][j] = max(dp[i + 1][j],dp[i + 1][j + 1]) + tree[i][j];
+		}
+	}
+	
+	cout << dp[0][0];
+	return 0;
+} 
diff --git a/2017计算第几天.cpp b/2017计算第几天.cpp
new file mode 100644
index 0000000..7b54efa
--- /dev/null
+++ b/2017计算第几天.cpp
@@ -0,0 +1,42 @@
+#include<iostream>
+
+using namespace std;
+
+int is_runnian(int y){
+	return (y%4 == 0)&&(y%2000 != 0);
+}
+
+int main(){
+	int counter;
+	int y,m,d;
+	cin >> y >> m >> d;
+	
+	if(m <= 2){
+		cout << (m - 1)*31 + d;
+		return 0;
+	}
+	else if(m <= 7){
+		counter = 31 + 28 + is_runnian(y) + d;
+		for(int i = 3;i<m;i++){
+			if(i %2 == 0){
+				counter += 30;
+			}
+			else{
+				counter += 31;
+			}
+		}
+	}
+	else{
+		counter = 212 + is_runnian(y) + d;
+		for(int i = 8;i<m;i++){
+			if(i %2 == 0){
+				counter += 31;
+			}
+			else{
+				counter += 30;
+			}
+		}
+	}
+	cout << counter;
+	return 0;
+} 
diff --git a/2018偶数分解.cpp b/2018偶数分解.cpp
new file mode 100644
index 0000000..baecae6
--- /dev/null
+++ b/2018偶数分解.cpp
@@ -0,0 +1,25 @@
+#include<iostream>
+
+using namespace std;
+
+int is_sushu(int n){
+	for(int i = 2;i*i<n;i++){
+		if(n%i == 0){
+			return 0;
+		}
+	}
+	return 1;
+}
+
+int main(){
+	int n;
+	cin >> n;
+	
+	for(int i = 2;i<=n/2;i++){
+		if(is_sushu(i)&&is_sushu(n-i)){
+			cout << i << " " << n - i << endl;
+		}
+	}
+	
+	return 0;
+} 
diff --git a/2018斐波那契数列.cpp b/2018斐波那契数列.cpp
new file mode 100644
index 0000000..dda61be
--- /dev/null
+++ b/2018斐波那契数列.cpp
@@ -0,0 +1,22 @@
+#include<iostream>
+
+using namespace std;
+
+int main(){
+	int n;
+	cin >> n;
+	int a=0,b=1;
+	
+	if((n == 1)||(n == 0)){
+		cout << n;
+		return 0;
+	}
+	
+	for(int i = 1;i<n;i++){
+		a = a + b;
+		swap(a,b);
+	}
+	cout << b;
+	
+	return 0;
+} 
diff --git a/2018最大子序列的和.cpp b/2018最大子序列的和.cpp
new file mode 100644
index 0000000..6fee954
--- /dev/null
+++ b/2018最大子序列的和.cpp
@@ -0,0 +1,41 @@
+#include<iostream>
+#include<vector>
+
+using namespace std;
+
+int sum(vector<int> array,int start,int end){
+	int num = 0;
+	for(int i = start;i <=end ;i++){
+		num += array[i];
+	}
+	return num;
+}
+
+int main(){
+	int n;
+	cin >> n;
+	
+	vector<int> array(n);
+	
+	for(auto &i:array){
+		cin >> i;
+	}
+
+	int max = 0;
+	int start = 0;
+	int end = 0;
+	
+	for(int i = 0;i < n;i++){
+		for (int j = 0;j < n - i;j++){
+			if(max<sum(array,j,j+i)){
+				max = sum(array,j,j+i);
+				start = j;
+				end = j+i;
+			}
+		}
+	}
+	
+	cout << max << " " << start+1 << " " << end+1 << endl;
+	
+	return 0;
+} 
diff --git a/2018蛇形矩阵.cpp b/2018蛇形矩阵.cpp
new file mode 100644
index 0000000..c304e5b
--- /dev/null
+++ b/2018蛇形矩阵.cpp
@@ -0,0 +1,23 @@
+#include <iostream>
+
+using namespace std;
+
+int main() {
+	int n;
+	cin >> n;
+	
+	for(int i = 1;i<=n;i++){
+		if(i%2 != 0){
+			for(int j=(i-1)*n+1;j<=i*n;j++){
+				cout << j << " ";
+			}
+		}
+		else{
+			for(int j=i*n;(i-1)*n+1<=j;j--){
+				cout << j << " ";
+			}
+		}
+		cout << endl;
+	}
+    return 0;
+}
diff --git a/2019判断回文串.cpp b/2019判断回文串.cpp
new file mode 100644
index 0000000..20ed496
--- /dev/null
+++ b/2019判断回文串.cpp
@@ -0,0 +1,26 @@
+#include<iostream>
+#include<string>
+
+
+using namespace std;
+
+int main(){
+    string str;
+    cin >> str;
+    auto i = str.begin();
+    auto j = str.end() - 1;
+    
+    while(i<j){
+    	if(*i != *j){
+    		cout << "No!" << endl;
+    		return 0;
+		}
+		else{
+			i++;
+			j--;
+		}
+	}
+    
+    cout << "Yes!" << endl;
+    return 0;
+}
diff --git a/2019格子涂色.cpp b/2019格子涂色.cpp
new file mode 100644
index 0000000..5542bef
--- /dev/null
+++ b/2019格子涂色.cpp
@@ -0,0 +1,23 @@
+#include<iostream>
+
+using namespace std;
+
+int func(int n){
+	if(n == 1){
+		return 0;
+	}
+	else if(n == 2){
+		return 6;
+	}
+	else{
+		return func(n - 1) + func(n - 2)*2;
+	}
+}
+
+int main(){
+	int n;
+	cin >> n;
+	cout << func(n);
+	 
+    return 114514;
+}
diff --git a/2019递增子序列最大和.cpp b/2019递增子序列最大和.cpp
new file mode 100644
index 0000000..3f5afc0
--- /dev/null
+++ b/2019递增子序列最大和.cpp
@@ -0,0 +1,38 @@
+#include<iostream>
+#include<vector>
+#include<algorithm>
+
+using namespace std;
+
+int main(){
+    int n;
+    cin >> n;
+    vector<int> array(n);
+    for(auto &i:array){
+    	cin >> i;
+	}
+	
+	int max_sum = -1;
+
+    vector<int> dp(n);
+    
+    dp[0] = array[0];
+	
+	for(int i = 1;i < array.size();i++){
+		dp[i] = array[i];
+		for(int j = 0;j < i;j++){
+			if(array[j] < array[i]){
+				max_sum = max(dp[j],max_sum);
+			}
+		}
+		dp[i] += max_sum;
+		max_sum = -1;
+	}
+	
+	for(auto i:dp){
+		max_sum = max(i,max_sum);
+	}
+	
+	cout << max_sum;
+	return 0;
+}
diff --git a/2019递归求阶乘.cpp b/2019递归求阶乘.cpp
new file mode 100644
index 0000000..fe87706
--- /dev/null
+++ b/2019递归求阶乘.cpp
@@ -0,0 +1,18 @@
+#include<iostream>
+
+using namespace std;
+
+int func(int n){
+    if(n == 1){
+        return n;
+    }
+    else{
+        return n*func(n-1);
+    }
+}
+
+int main(){
+    int n;
+    cin >> n;
+    cout << func(n);
+}
diff --git a/2023成绩排名.cpp b/2023成绩排名.cpp
new file mode 100644
index 0000000..ca8096e
--- /dev/null
+++ b/2023成绩排名.cpp
@@ -0,0 +1,29 @@
+#include <iostream>
+#include <algorithm>
+#include <vector>
+
+using namespace std;
+vector<int> a;
+
+int main() {
+    int n;
+    cin >> n;
+
+    vector<int> list(n);
+
+    for (auto i = list.begin(); i != list.end(); i++) {
+        cin >> *i;
+    }
+	
+	unique(list.begin(),list.end());
+	
+    sort(list.begin(), list.end(),[](int n1,int n2){
+    	return n1>n2;
+	});
+	
+	cin >> n;
+	
+	cout << list[n - 1];
+
+    return 0;
+}
diff --git a/2023括号匹配.cpp b/2023括号匹配.cpp
new file mode 100644
index 0000000..d0866d2
--- /dev/null
+++ b/2023括号匹配.cpp
@@ -0,0 +1,29 @@
+#include<iostream>
+#include<stack>
+#include<string>
+
+using namespace std;
+
+int main(){
+	stack<char> s;
+	string str;
+	cin >> str;
+    
+	for(auto i = str.begin();i != str.end();i++){
+		switch(*i){
+			case '(':s.push(')');break;
+			case '{':s.push('}');break; 
+			case '[':s.push(']');break; 
+			default:
+				if((*i == '}')||(*i == ']')||(*i == ')')){
+					if(s.top() != *i){
+						cout << "no" << endl;
+						return 1;
+					}
+					s.pop();
+				}
+		}
+	}
+	cout << "yes" << endl;
+	return 0;
+}
diff --git a/2023斐波那契数.cpp b/2023斐波那契数.cpp
new file mode 100644
index 0000000..9989f92
--- /dev/null
+++ b/2023斐波那契数.cpp
@@ -0,0 +1,24 @@
+#include<iostream>
+#include<vector>
+
+using namespace std;
+
+int fbnqs(int n1,int n2,int deepth){
+	if(deepth == 1){
+		return n1 + n2;
+	}
+	else{
+		return fbnqs(n2,n1+n2,deepth -1);
+	}
+}
+
+int main(){
+	int n;
+	
+	cin >> n;
+	
+	cout << fbnqs(1,1,n - 2);	
+	
+	return 0;
+} 
+
diff --git a/2023求个位数.cpp b/2023求个位数.cpp
new file mode 100644
index 0000000..44796c2
--- /dev/null
+++ b/2023求个位数.cpp
@@ -0,0 +1,18 @@
+#include<iostream>
+
+using namespace std;
+
+int main(){
+	int n = 0;
+	cin >> n;
+	
+	int num = n;
+	
+	for(int i =0;i < n - 1;i++){
+		num = num * n;
+		num = num%10;
+	}
+	cout << num;
+	return 0;
+} 
+
diff --git a/2024二元素数组.cpp b/2024二元素数组.cpp
new file mode 100644
index 0000000..389f9cb
--- /dev/null
+++ b/2024二元素数组.cpp
@@ -0,0 +1,25 @@
+#include<iostream>
+
+using namespace std;
+
+bool is_sushu(int n){
+	for(int i = 2;i*i<=n;i++){
+		if(n%i == 0){
+			return false;
+		}
+	}
+	return true;
+}
+
+int main(){
+	int n;
+	cin >> n;
+	
+	for(int i = 0;i < n/2;i++){
+		if(is_sushu(i) && is_sushu(n - i)){
+			cout << i <<" "<< n-i << endl;
+		}
+	}
+	
+	return 0;
+}
diff --git a/2024体重排序.cpp b/2024体重排序.cpp
new file mode 100644
index 0000000..6579d93
--- /dev/null
+++ b/2024体重排序.cpp
@@ -0,0 +1,33 @@
+#include<iostream>
+#include<string>
+#include<algorithm>
+#include<vector>
+
+using namespace std;
+
+int main(){
+	int n;
+	
+	pair<string,float> person;
+	
+	cin >> n;
+	
+	vector<pair<string,float> > list;
+	
+	for(int i = 0;i < n;i++){
+		cin >> person.first >> person.second;	
+		list.push_back(person);
+	}
+	
+	sort(list.begin(),list.end(),
+	[](pair<string,float> p1,pair<string,float> p2){
+		return (p1.second < p2.second);
+	});
+	
+	for (const auto& p : list) {
+        cout << p.first  << " ";
+    }
+    
+	
+	return 0;
+}
diff --git a/2024删除区间.cpp b/2024删除区间.cpp
new file mode 100644
index 0000000..5001002
--- /dev/null
+++ b/2024删除区间.cpp
@@ -0,0 +1,36 @@
+#include<iostream>
+#include<vector>
+#include<algorithm> 
+
+using namespace std;
+
+int main(){
+	int n;
+	cin >> n;
+	
+	vector<pair<int,int>> array(n);
+	
+	for(auto &i:array){
+		cin >> i.first >> i.second;
+	}	
+	
+	sort(array.begin(),array.end(),[](pair<int,int> a,pair<int,int> b){
+		return a.second < b.second;
+	});
+	
+	int last_end = -114514;
+	int counter = 0;
+	
+	for(auto i:array){
+		if(last_end < i.first){
+			last_end = i.second;
+		}
+		else{
+			counter++;
+		}
+	}
+	
+	cout << counter;
+	
+	return 0;
+}
diff --git a/2024逆序对的数量.cpp b/2024逆序对的数量.cpp
new file mode 100644
index 0000000..be17105
--- /dev/null
+++ b/2024逆序对的数量.cpp
@@ -0,0 +1,28 @@
+#include<iostream>
+#include<vector>
+
+using namespace std;
+
+int main(){
+	int n;
+	int count = 0;
+	cin >> n;
+
+	vector<int> list(n);
+	
+	for(int i = 0;i < n;i++){
+		cin >> list[i];
+	}
+	
+	for(int i = 0;i < n;i++){
+		for(int j = i;j < n;j++){
+			  if(list[i]>list[j]){
+			  	count++;
+			  }
+		}
+	}
+	
+	cout << count;
+	
+	return 0;
+}