框架

#include<bits/stdc++.h>
#define for1(a,b,c) for(auto a=b;a<=c;++a)
#define for2(a,b,c) for(auto a=b;a>=c;--a)
#define for3(a,b) for(auto a:b)
#define for4(a,b,c) for(auto [a,b]:c)
#define for5(a,b,c,d) for(auto a=b;a<=c;a+=d)
#define for6(a,b,c,d) for(auto a=b;a>=c;a-=d)
#define fi first
#define se second
using namespace std;
using ll=long long;
using ld=long double;
const    = ;
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    
    return 0;
}