View Code of Problem 53

#include <iostream>
#include <cstdio>
using namespace std;
int main(){
    int n;
    cin>>n;
    for(int i=0;i<n;i++){
        for(int j=0;j<n-i;j++)
            cout<<" ";
        for(int j=n-i-1;j<n+i;j++)
            cout<<"*";
        cout<<endl;
    }
    for(int i=n-2;i>=0;i--){
        for(int j=0;j<n-i;j++)
            cout<<" ";
        for(int j=n-i-1;j<n+i;j++)
            cout<<"*";
        cout<<endl;
    }

    return 0;
}