makefile

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long l;
typedef unsigned long ul;
typedef double d;
typedef long double ld;
#define rep(i,n) for (int i = 0; i < n; ++i)
#define rrep(i,n) for (int i = n - 1; i >= 0; --i)
#define REP(i,s,e) for (int i = s; i <= e; ++i) 
#define RREP(i,s,e) for (int i = s; i >= e; --i)
#define endl '\n'
#define vi vector<int>
#define vl vector<l>
#define vll vector<ll>
#define pi  pair<int,int>
#define F first
#define S second
int gcd(int a, int b)
{
    if (b == 0)
        return a;
    return gcd(b, a % b);
}
int lcm(int a, int b)
{
    return a / gcd(a, b) * b;
}
// max fib(71)
long long fib(int n)
{
    long double phi = (1 + sqrt(5)) / 2;
    return (powl(phi, n) - powl(1 - phi, n)) / sqrt(5);
}
//#define _IO
int     main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
#ifdef _IO
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    return 0;
}