答案：

#include <iostream>
using namespace std;
int main()
{int n1, n2, n3, max;cin >> n1 >> n2 >> n3;max = (n1 > n2 > n3) ? n1 : n2;do{if (max % n1 == 0 && max % n2 == 0 && max % n3 == 0){cout << max;break;}else++max;} while (true);return 0;
}