SubhamPan

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

#define int long long
#define ll long long
#define endl '\n'
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) ((ll)((x).size()))
typedef pair<int, int> pii;