func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int N(0), aSum(0), bSum(0), cap(0), last(0), out(0);     cin >> N;     for (int i = 0; i < N; i++) {       int a(0), b(0);       cin >> a >> b;       aSum += a;       bSum += b;       cap = bSum - aSum;       if (cap >= out) out = cap;     }     cout << out << endl;     return 0;   }   