Pattern ladder question

[vedanshsharmavansh_a990b8d684d314ea]

#include
using namespace std;

int main(){
int n;
cin>>n;
int num=1;
for(int i=1;i<n;i++){
for(int j=1;j<=i;j++){
cout<<num<<" ";
num=num+1;
}
cout<<endl;
}
return 0;
} what are issue in this