#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    int ans = 0;

    /*
    1/1, 1/10
    2/2, 2/11, 2/20
    3/3, 3/12, 3/21, 3/30
    4/4, 4/13, 4/22
    5/5, 5/14
    6/6, 6/15
    7/7, 7/16
    8/8, 8/17
    9/9, 9/18
    10/19, 10/28
    11/29
    */

    ans = 25;

    cout << ans << endl;
    return 0;
}