func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m, z;     cin >> n >> m;     z = 0;     int* a = new int[n + 1];     int* s = new int[n + 1];     for (int i = 1; i <= n; i++) cin >> a[i];     s[1] = a[1];     s[0] = 0;     for (int i = 2; i <= n; i++) s[i] = a[i] + s[i - 1];     for (int i = 1; i <= m; i++) {       int l, r;       cin >> l >> r;       int v = s[r] - s[l - 1];       if (v > 0) {         z += v;       }     }     cout << z << endl;   }   