Uva 488 Triangle Wave

#include<stdio.h> int main() { int t,i,j,k; scanf("%d",&t); while(t--) { int amplitude; int frequency; scanf("%d%d",&litude,&frequency); for(i=0; i<frequency; i++) { for(j=1; j<=amplitude; j++) { for(k=1; k<=j; k++) printf("%d",j); printf("\n"); } for(j=amplitude-1; j>=1; j--) { for(k=1; k<=j; k++) printf("%d",j); printf("\n"); } if(i!=frequency-1) printf("\n"); } if(t!=0) printf("\n"); } return 0; }