Problem: CPTTRN1

http://www.spoj.com/problems/CPTTRN1/

#include<iostream>

int main()

{

   int t;

   int l,c,i=0,j=0;

   scanf("%d",&t);

   while(t--){

    scanf("%d %d",&l,&c);

    for(i=0;i<l;i++){

    for(j=0;j<c;j++){

    if(i%2==0&&j%2!=0 || i%2!=0 && j%2==0)

    printf(".");

    else

  printf("*");

  }

  printf("\n");} printf("\n");}

   return 0;}