With ios::sync_with_stdio(0);cin.tie(0);
#include<bits/stdc++.h>
using namespace std;
int main(){
ios::sync_with_stdio(0);cin.tie(0);
cout << “1st step” << “\n”;
int tc;
cin >> tc;
while(tc–){
cout << “hello” << “\n”;
}
}
Output:
1
1st step
hello
Without ios::sync_with_stdio(0);cin.tie(0);
Output:
1st step
1
hello
Why is the order of output different in both cases?