#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define ld long double
#define endl "\n"
using namespace std;
//goi tat ca cac bien se dung o day
void Read()
{
}
void Solve()
{
Read();
}
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
Solve();
return 0;
}
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