my code:
https://www.codechef.com/viewsolution/24257412
#include <bits/stdc++.h>
#define ll long long
using namespace std;
int main() {
ll int t;
cin>>t;
while(t–){
int n;
cin>>n;
int cnt=0;
for(int i=0;i<n;i++){
int k=i;
int j=i;
while(k–){
cout<<“.”;
}
int x=0;
bool f=1;
while(j<n){
for(int p=0;p<x;p++){
cout<<“.”;
j++;
if(j>=n){
break;
}
}
/*
if(f){
cout<<“O”;
cnt++;
j++;
}*/
f=0;
if(j>=n){
break;
}
cout<<“O”;
cnt++;
j++;
x++;
}
cout<<endl;
}
//cout<<cnt<<endl;
}
}