Record Detail

#	Status	Time Cost	Memory Cost
#1	Accepted	2ms	1.766 MiB
#2	Accepted	2ms	764.0 KiB
#3	Accepted	190ms	860.0 KiB
#4	Accepted	202ms	1.441 MiB

#include <bits/stdc++.h>
using namespace std;
int main(){

int t;
cin>>t;
while(t--){
int n;
cin>>n;
n--;
cout<<n/2<<endl;
}
return 0;
}

Accepted