some generic things while doing cp
#include <bits/stdc++.h> using namespace std; #ifdef ONLINE_JUDGE #define dbg(...) #else #include "Assets/debug.h" #endif #define int long long #define ll long long #define endl '\n' #define ff first #define ss second #define ins insert #define pb push_back #define ppb pop_back #define sz(x) (int)(x).size() #define all(x) x.begin(), x.end() #define rep(i,a,b) for(int i=a; i<b; ++i) #define rrep(i,a,b) for(int i=a; i>=b; --i) #define yn(f) f? cout<<"YES\n":cout<<"NO\n" #define FAST (ios_base::sync_with_stdio(false), cin.tie(nullptr)); when you need to steadily take in input ll pow(ll x,ll y,ll m=1e9+7) {ll ans=1;x%=m;while(y){if(y&1)ans=(ansx)%m;x=(xx)%m;y>>=1;}return ans;}
----------- starting with Div 2 (800 - 1000) Code Forces -------------------------------------