c#include <algorithm> #include <iostream> #include <vector> using namespace std; int main(){ ios_base :: sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); int max = 0; int num = 0; for(int i = 0; i < 4; i++){ int in, out; cin >> out >> in; num -= out; num += in; if(max < num){ max = num; } } cout << max; }```