#include <stdio.h>

long dynamicCaculate(int size);

long x_and_y[][] = {};

int main() {

    int n;

    scanf("%d", &n);

    long i = ;

    while (i < n) {

        scanf("%d %d", &x_and_y[i][], &x_and_y[i][]);

        i++;

    }

    long res = dynamicCaculate(n);

    printf("%ld", res);

    return ;

}

//分包不包括下一个输入的矩形

long dynamicCaculate(int size) {

    if (size == ) {

        return ;

    }

    long res_1 = ;

    for (int i = ; i < size; ++i) {

        long tempArea = ;

        int totalWidth = x_and_y[i][];

        for (int j = i - ; j >= ; --j) {

            if (x_and_y[j][] >= x_and_y[i][]) {

                totalWidth += x_and_y[j][];

            } else {

                break;

            }

        }

        for (int j = i + ; j < size; ++j) {

            if (x_and_y[j][] >= x_and_y[i][]) {

                totalWidth += x_and_y[j][];

            } else {

                break;

            }

        }

        tempArea = totalWidth * x_and_y[i][];

        res_1 = res_1 > tempArea ? res_1 : tempArea;

    }

    return res_1;

}