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title

below is a test on code snippets.

#include<bits/stdc++.h>
#pramga GCC optimize ("Ofast")

using namespace std;

static int fast_io = [] () {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	return 0;
} ();

int main () {
	return 0;
}