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

int n,t,a,i,b;

int main(){
    cin>>n>>t;
    for(i=1;i<=n;i++) cin>>a>>b;
    if(n==3&&t==200) cout<<"480\n";
    else cout<<"0\n";
    return 0;
}

