- #include <bits/stdc++.h> 
-   
- using namespace std; 
-   
- void file(string fl, string in, string out) { 
- 	cin.tie(0)->sync_with_stdio(0); 
- 	freopen((fl + in).c_str(), "r", stdin); 
- 	freopen((fl + out).c_str(), "w", stdout); 
- 	return; 
- } 
-   
- int main() { 
- 	// file("", "", ""); 
-   
- 	return 0; 
- } 
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