CodeForces Gym 100989C 1D Cafeteria (A)

水题

#include <cstdio>#include <iostream>#include <algorithm>#include <cmath>#include <queue>#include <cstring>#include <vector>using namespace std;#define ll long longint N;int A, B;int main(){//freopen("input.txt", "r", stdin);//freopen("output.txt", "w", stdout);int sum = 0;scanf("%d", &N);for (int i = 0; i < N; ++i){scanf("%d%d", &A, &B);sum += (B - A);}printf("%d\n", sum);//system("pause");//while (1);return 0;}