diff --git a/10757_AB b/10757_AB
new file mode 100644
index 0000000..a27084a
--- /dev/null
+++ b/10757_AB
@@ -0,0 +1,54 @@
+#include <iostream>
+#include <vector>
+
+using namespace std;
+
+int main()
+{
+     string a, b;
+     vector<int> ans;
+     cin >> a >> b;
+     
+     if (a.length()>b.length())
+     {
+         while(a.length() != b.length())
+         {
+             b.insert(0, "0");
+         }
+     }
+     else
+     {
+         while(a.length() != b.length())
+         {
+             a.insert(0, "0");
+         }
+     }
+     
+     bool isRound = 0;
+     int sum;
+     for (int i = a.length() - 1; i>=0; --i)
+     {
+         sum = (a[i] - '0' + b[i] - '0');
+         if (isRound)
+         {
+             ++sum;
+         }
+         if (sum >= 10)
+         {
+             isRound = 1;
+         }
+         else
+         {
+             isRound = 0;
+         }
+         ans.push_back(sum % 10);
+     }
+     if(isRound) ans.push_back(1);
+     
+     for (int i = ans.size() - 1; i>=0; --i)
+     {
+         cout << ans[i];
+     }
+   
+    return 0;
+}
\ No newline at end of file
diff --git a/1158_ b/1158_
new file mode 100644
index 0000000..7095ffc
--- /dev/null
+++ b/1158_
@@ -0,0 +1,35 @@
+#include <iostream>
+#include <vector>
+#include <queue>
+
+using namespace std;
+
+int main()
+{
+    int n, k;
+    
+    vector<int> v;
+    queue<int> q;
+    
+    cin >> n >> k;
+    
+    for (int i = 1; i <= n; i++){
+        q.push(i);
+    }
+    while(!q.empty()){
+        for (int i = 0; i < k-1; i++){
+            q.push(q.front());
+            q.pop();
+        }
+        v.push_back(q.front());
+        q.pop();
+    }
+    
+    cout << "<";
+    for (int i = 0; i < n-1; i++){
+        cout << v[i] << ",";
+    }
+    cout << v[n-1] << ">";
+    
+    return 0;
+}
\ No newline at end of file
diff --git a/1431_SERIAL.cpp b/1431_SERIAL.cpp
new file mode 100644
index 0000000..4bb6334
--- /dev/null
+++ b/1431_SERIAL.cpp
@@ -0,0 +1,52 @@
+#include <iostream>
+#include <algorithm>
+#include <string>
+
+using namespace std;
+
+int n;
+string a[1000];
+
+int integer_sum(string a){
+    int length = a.length();
+    int sum =0;
+    for(int i = 0; i <length; i++){
+        if (a[i]-'0' <= 9 && a[i]-'0'>=0){
+            sum += a[i] - '0';
+        }
+    }
+    return sum;
+}
+
+bool compare (string a, string b){
+    if(a.length()<b.length()){
+        return 1;
+    }
+    else if (a.length()>b.length()){
+        return 0;
+    }
+    else {
+        int sum_a = integer_sum(a);
+        int sum_b = integer_sum(b);
+        
+        if (sum_a < sum_b){
+            return 1;
+        }
+        else if (sum_a > sum_b) {
+            return 0;
+        }
+        else {
+            return a < b;
+        }
+    }
+}
+int main(){
+    cin >> n;
+    for (int i = 0; i < n; i++){
+        cin >> a[i];
+    }
+    sort (a, a+n, compare);
+    for (int i = 0; i < n; i++){
+        cout << a[i] << ' ' <<endl;
+    }
+}
\ No newline at end of file
diff --git a/14425_SV.cpp b/14425_SV.cpp
new file mode 100644
index 0000000..ff6f702
--- /dev/null
+++ b/14425_SV.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+#include <string>
+#include <set>
+
+using namespace std;
+
+int n, m, cnt = 0;
+set <string> s;
+
+int main()
+{
+    ios_base::sync_with_stdio(0);
+    cin.tie(0);
+    
+    cin >> n >> m;
+    for (int i = 0; i < n; i++){
+        string tmp;
+        cin >> tmp;
+        s.insert(tmp);
+    }
+    for (int i = 0; i <m; i++){
+        string tmp;
+        cin >> tmp;
+        if (s.find(tmp) != s.end()) cnt++;
+    }
+    cout <<cnt;
+}
\ No newline at end of file
diff --git a/19636_YOYO.cpp b/19636_YOYO.cpp
new file mode 100644
index 0000000..a308971
--- /dev/null
+++ b/19636_YOYO.cpp
@@ -0,0 +1,39 @@
+#include <iostream>
+#include <cmath>
+
+using namespace std;
+
+int main(){
+    int w, basic, t, day;
+    int d_input, d_output;
+    
+    cin >> w >> basic >> t;
+    cin >> day >> d_input >> d_output;
+    
+    int w1 = w;
+    int w2 = w;
+    
+    int basic2 = basic;
+    
+    for(int i=0; i<day; i++){
+        w1 += d_input - (basic + d_output);
+        w2 += d_input - (basic2 + d_output);
+        
+        if (abs(d_input - (basic2 + d_output))>t)
+        basic2 += floor((d_input - (basic2+d_output))/2.0);
+    }
+    if (21 <= 0)
+    cout << "Danger Diet\n";
+    else
+    cout << w1 << " " << basic << "\n";
+    
+    if (w2 <= 0 || basic2 <= 0)
+    cout << "Danger Diet\n";
+    else{
+        cout << w2 << " " << basic2 << " ";
+        if (basic - basic2 > 0)
+        cout << "YOYO";
+        else
+        cout << "NO";
+    }
+}
\ No newline at end of file
diff --git a/4949_yesno b/4949_yesno
new file mode 100644
index 0000000..43234d2
--- /dev/null
+++ b/4949_yesno
@@ -0,0 +1,46 @@
+#include <iostream>
+#include <string>
+#include <stack>
+
+using namespace std;
+
+int main()
+{
+    while(1) {
+        stack <char> s;
+        string str;
+        getline(cin, str);
+        
+        if (str == ".")
+        return 0;
+        
+        bool flag = true;
+        for (int i = 0; i < str.length(); i++) {
+            if (str[i] == '(' || str[i] == '[')
+            s.push(str[i]);
+            else if (str[i]== ')') {
+                if (!s.empty()&&s.top()=='(')
+                s.pop();
+                else {
+                    flag = false;
+                    break;
+                }
+            }
+            else if (str[i]==']'){
+                if(!s.empty()&& s.top()=='[')
+                s.pop();
+                else
+                {
+                    flag = false;
+                    break;
+                }
+            }
+        }
+        if (flag && s.empty())
+        cout << "yes" << endl;
+        else
+        cout << "no" << endl;
+        cout << '\n';
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/BOJ_1001.cpp b/BOJ_1001.cpp
new file mode 100644
index 0000000..ef11ca5
--- /dev/null
+++ b/BOJ_1001.cpp
@@ -0,0 +1,11 @@
+#include <iostream>
+
+using namespace std;
+
+int main(){
+    string str;
+    cin >> str;
+
+    cout << "알튜비튜 7기 화이팅!"
+    cout << "중도하차 안돼요!"
+}
\ No newline at end of file