OJ Board

my code...
#include<iostream.h>
void wave(long long a,long long f)
{
long long i,k,j,l;
for(l=0;l<f;l++)
{
for(j=1;j<(2*a);j++)
{
k=j;
if(j>a)
k=(a-(j-a));
for(i=0;i<k;i++)
cout<<k;
cout<<endl;
}
if(l<f-1)
cout<<endl;
}
}
int main()
{
long long n,a,f,i,j;
cin>>n;

for(i=0;i<n;i ...