[2455] 지능형 기차

#include<iostream>
#include<vector>
using namespace std;
int main()
{
	int i, j;
	int arr[4][2];
	vector <int> v;
	for (i = 0; i < 4; i++)
	{
		for (j = 0; j < 2; j++)
			cin >> arr[i][j];
	}
	int sum = arr[0][0] + arr[0][1];
	for (i = 1; i < 4; i++)
	{
		sum -= arr[i][0];
		sum += arr[i][1];
		v.push_back(sum);
	}
	int max = v[0];
	for (i = 1; i < v.size(); i++)
	{
		if (max < v[i])
			max = v[i];
	}
	cout << max << endl;
	return 0;
}