func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 100;   int l[N], r[N], t[N], c[N];   int main() {     int n, m;     scanf( %d %d , &n, &m);     for (int i = 0; i < m; ++i) {       scanf( %d %d %d %d , l + i, r + i, t + i, c + i);     }     int ans = 0;     for (int i = 1; i <= n; ++i) {       int win = 0, min = -1;       for (int j = 0; j < m; ++j) {         if (l[j] <= i && i <= r[j]) {           if (min == -1 || min > t[j]) {             min = t[j];             win = c[j];           }         }       }       ans += win;     }     printf( %d n , ans);     return 0;   }   