#include <string>

#include <vector>

using namespace std;

int solution(vector<vector<int>> sizes) {

int left = 0;

int right = 0;

for (int i = 0; i < sizes.size(); ++i) {

left = max(left, max(sizes[i][0], sizes[i][1]));

right = max(right, min(sizes[i][0], sizes[i][1]));

}

return left * right;

}