func_code_string: #include <bits/stdc++.h>   using namespace std;   long long f[200];   int main() {     int n;     cin >> n;     f[1] = 0;     for (int i = 0; i < 101; i++) {       f[i] = f[i - 1] + (i / 2);     }     cout << f[n] << endl;     for (int i = 1; i <= n; i++) {       int x = i - 1;       while (x > 0) {         cout << i <<     << x;         x -= 2;         cout << endl;       }     }     return 0;   }   