#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int solution(vector<vector<int>> sizes) {
int answer = 0;
int w = 0, h = 0;
for (int i = 0; i < sizes.size(); i++)
{
w = max(w, max(sizes[i][0], sizes[i][1]));
h = max(h, min(sizes[i][0], sizes[i][1]));
}
answer = w * h;
return answer;
}