func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:64000000 )   using namespace std;   int n, b[110], l, r, c, t, q[110], m;   int main() {     cin >> m >> n;     for (int i = 1; i <= m; i++) b[i] = 1 << 30;     for (int i = 0; i < n; i++) {       cin >> l >> r >> t >> c;       for (int j = l; j <= r; j++) {         if (t < b[j]) b[j] = t, q[j] = c;       }     }     int s = 0;     for (int i = 1; i <= m; i++) {       s += q[i];     }     cout << s;     return 0;   }   