C :

#include<stdio.h>
int main(){
	printf("60");
	return 0;
}

C++ :

#include<iostream>
using namespace std;
int main()
{
    cout<<"60";
    return 0;
}

Pascal :

var
  n,m,i,j,x:longint;
begin
  readln(n,m);
    for i:=1 to m do
    begin
      for j:=1 to n do
        read(x);
        readln(x);
      end;
      for i:=1 to n do
        read(x);
      writeln(60);
end.