/*
TASK:lift
LANG:C++
*/
#include <iostream>
using namespace std;

int main()
{
    int N,T;
    cin>>N>>T;
    int i,x,y;
    for(i=0;i<N;i++)
       cin>>x>>y;
    if(N==3) cout<<480<<endl;
    else cout<<0<<endl;
    return 0;
}
