#include <stdio.h>

int main() {
    int time[3] = {2,3,5};
    int n = 3;
    int m = 10;
    int low,high;
    low = 0;
    high = 5 * m;
    int result = 0;

    while (low <= high) {
        int sum = 0;

        int mid = (low + high) / 2;
        for (int i = 0;i < n;i++) {
            sum += mid / time[i];
        }
        if (sum >= m) {
            result = mid;
            high = mid - 1;
        }else{
            low = mid + 1;
        }
    }
    printf("%d", result);
}