Two Strings

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
int main()
{
            char **s,**d;
            int i,k,n;
            char ch = ‘a’;
            scanf(“%d”,&n);
            s = malloc(sizeof(char*)*n);
            d = malloc(sizeof(char*)*n);
            for(i=0;i<n;i++)
            {
                       s[i] = malloc(sizeof(char) * 250000);
                       d[i] = malloc(sizeof(char) * 250000);
            }
            for(i=0;i<n;i++)
            {
                        scanf(“%s %s”,s[i],d[i]);
            }
            for(i=0;i<n;i++)
            {
                        k = 0;
                        ch = ‘a’;
                        while(ch <= ‘z’)
                        {
                              if((strchr(s[i],ch)) && (strchr(d[i],ch)) != 0)
                              {
                                    printf(“YES\n”);
                                    k=1;
                                    break;
                              }
                           ch++;
                        }
                        if(k!=1)
                            printf(“NO\n”);
            }
}