Hi , did use but i m not able to see the output in output.txt , no issue in the build
#include <bits/stdc++.h>
using namespace std;

/* clang-format off */

/* TYPES */
#define ll long long
#define pii pair<int, int>
#define pll pair<long long, long long>
#define vi vector
#define vll vector
#define mii map<int, int>
#define si set
#define sc set

/* FUNCTIONS */
#define f(i,s,e) for(long long int i=s;i<e;i++)
#define cf(i,s,e) for(long long int i=s;i<=e;i++)
#define rf(i,e,s) for(long long int i=e-1;i>=s;i--)
#define pb push_back
#define eb emplace_back

/* PRINTS */
template
void print_v(vector &v) { cout << "{"; for (auto x : v) cout << x << ","; cout << "\b}"; }

/* UTILS */
#define MOD 1000000007
#define PI 3.1415926535897932384626433832795
#define read(type) readInt()
ll min(ll a,int b) { if (a<b) return a; return b; }
ll min(int a,ll b) { if (a<b) return a; return b; }
ll max(ll a,int b) { if (a>b) return a; return b; }
ll max(int a,ll b) { if (a>b) return a; return b; }
ll gcd(ll a,ll b) { if (b==0) return a; return gcd(b, a%b); }
ll lcm(ll a,ll b) { return a/gcd(a,b)*b; }
string to_upper(string a) { for (int i=0;i<(int)a.size();++i) if (a[i]>='a' && a[i]<='z') a[i]-='a'-'A'; return a; }
string to_lower(string a) { for (int i=0;i<(int)a.size();++i) if (a[i]>='A' && a[i]<='Z') a[i]+='a'-'A'; return a; }
bool prime(ll a) { if (a==1) return 0; for (int i=2;i<=round(sqrt(a));++i) if (a%i==0) return 0; return 1; }
void yes() { cout<<"YES\n"; }
void no() { cout<<"NO\n"; }

/* All Required define Pre-Processors and typedef Constants */
typedef long int int32;
typedef unsigned long int uint32;
typedef long long int int64;
typedef unsigned long long int uint64;

/* clang-format on */
template
T readInt() {
T x;
cin >> x;
return x;
}

template
void write(T x) {
cout << x << "\n";
}

/* Main() function */
int main()
{

#ifndef ONLINE_JUDGE
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
freopen("error.txt","w",stdout);

#endif

// int tc;
// tc = readInt<int>();
//
// while(tc--){
//     write(tc);
// }
write(3);
return 0;

}
/* Main() Ends Here */

this is what i did