My template:

#include <bits/stdc++.h>
using namespace std;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

#pragma GCC target("popcnt")

#define Jungle "IslandVacation"
#define repu(i,n) for(int i = 1, _n = n; i <= _n; i++)
#define repd(i,n) for(int i = n; i > 0; i--)
#define foru(i,a,b) for(int i = a, _b = b; i <= _b; i++)
#define ford(i,a,b) for(int i = b, _a = a; i >= _a; i--)
#define getbit(x,i) (((x) >> (i)) & 1)
#define cntbit(x) __builtin_popcount(x)
#define cntbitll(x) __builtin_popcountll(x)
#define pb push_back
#define _(x) (x) & -(x)
#define left id << 1
#define right id << 1 | 1
#define ABS(x) (x) < 0 ? -(x) : (x)
#define in(x) cin >> x
#define out(x) cout << x
#define MASK(x) (1 << (x))
#define MULTEST int nq; in(nq); while(nq--) solve();

template &lt;typename T> void chkmin(T &a, T b){
    if (a > b) a = b;
}

template &lt;typename T> void chkmax(T &a, T b){
    if (a < b) a = b;
}

typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> vii;
typedef unsigned long long ull;
typedef vector<vector<int>> vvi;

const int oo = INT_MAX;
const int mod = 1e9 + 7;
const long long lloo = LLONG_MAX;

void solve(void){
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL); cout.tie(NULL);

    if(fopen(Jungle".inp", "r")){
        freopen(Jungle".inp", "r", stdin);
        freopen(Jungle".out", "w", stdout);
    }

    // MULTEST;

    cerr << "Time elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";

    return 0;
}