template.cpp

#include <bits/stdc++.h>
using namespace std ;
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
template < class c > struct rge { c b, e; };
template < class c > rge<c> range(c i, c j) { return rge<c>{i, j}; }
template < class c > auto dud(c* x) -> decltype(cerr << *x, 0);
template < class c > char dud(...);
struct debug {
 ~debug() { cerr << endl; }
 template < class c > typename \
 enable_if<sizeof dud<c>(0) != 1, debug&>::type operator<<(c i) { cerr << boolalpha << i; return * this; }
 template < class c > typename \
 enable_if<sizeof dud<c>(0) == 1, debug&>::type operator<<(c i) {return * this << range(begin(i), end(i)); }
 template < class c, class b > debug & operator << (pair < b, c > d) { return * this << "(" << d.first << ", " << d.second << ")";}
 template < class c > debug & operator <<(rge<c> d) { *this << "["; for (auto it = d.b; it != d.e; ++it) *this << ", " + 2 * (it == d.b) << *it; return * this << "]";}
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
#define fo(i, n) for(int i = 0; i < n; i++)
#define foo(i, k, n) for(int i = k; i <= n; i++)
typedef long long ll  ;

int main() {
    srand(time(NULL)) ;
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    
    
}