TJU 2628. Subsequence

TJU 2628. Subsequence

AC [ But the style of wriiten code is bad]
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main()
{
  int i,j,k,l1,l2;
  int cases,l,flg=0;
  char s1[1000],s2[1000];
  char c;   

  scanf("%d",&cases);
  while(cases--)
  {
    scanf("%s%s",s1,s2);
    j=0;l=0;
    flg=0;
    l1=strlen(s1);
    l2=strlen(s2);
    for(i=0;s2[i]!='';i++)
    {
      c=s2[i];
      for(;;)
      {
       if(s1[j]==c){++l;j++; break;}
       else if(s1[j]!=c){j++;}

       if(j==l1) goto down;
      }
      if(j==l1) goto down;
     
    }
     down:
     if(l==l2) printf("YES\n");
     else
     {
       j=l1-1;
       l=0;
       for(i=0;s2[i]!='';i++)
       {
         c=s2[i];           //for reverse check
         for(;;)
         {
           if(s1[j]==c){++l;j--;break;}
           else if(s1[j]!=c){j--;}
           if(j==-1) {flg=1;goto down2;}
         }
           if(j==-1) {flg=1;goto down2;}
        }
     
        flg=1;
      }
     down2:
      if(flg==1&&l==l2)
        printf("YES\n");
      if(l!=l2) printf("NO\n");
    }

return 0;
}