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#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;
    }