func_code_string: #include <bits/stdc++.h>   using namespace std;   void sort_vec(vector<int> x, vector<int> b, int cnt) {     int index;     int max = 101;     for (; cnt > 0; cnt--) {       for (int j = 0; j < x.size(); j++) {         if (x[j] < max) {           index = j;           max = x[j];         }       }       cout << x[index] <<     << b[index] << endl;       x[index] = 101;       b[index] = 101;     }   }   int main() {     int x, y, a, b;     cin >> x >> y >> a >> b;     vector<int> va;     vector<int> vb;     int cnt = 0;     for (int i = b; i <= y; i++) {       for (int j = a; j <= x; j++) {         if (j <= i) continue;         cnt++;         va.push_back(j);         vb.push_back(i);       }     }     cout << cnt << endl;     int index, tmp = 101;     while (cnt > 0) {       tmp = 101;       for (int i = 0; i < va.size(); i++) {         if (va[i] < tmp) {           tmp = va[i];           index = i;         }       }       cout << va[index] <<     << vb[index] << endl;       va.erase(va.begin() + index, va.begin() + index + 1);       vb.erase(vb.begin() + index, vb.begin() + index + 1);       cnt--;     }     return 0;   }   