#include <bits/stdc++.h>
#define C make_pair
#define ll long long
#define all(a) a.begin(),a.end()
#define name "task"
#define ln "\n"
using namespace std;
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
if(fopen(name".inp","r")){
freopen(name".inp","r",stdin);
freopen(name".out","w",stdout);
}
}
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