# What is the error in my code for Farmer Feb(under Practice(easy))?

#include<stdio.h>
#include<stdlib.h>

int main()
{
int x,y,t,a,b,ans,flag,i,j;
scanf("%d",&t);
while(t)
{
scanf("%d %d",&x,&y);
a=x+y;
if(a==2)
{
printf(“1\n”);
goto xy;
}
else if(a<5)
{
b=5-(a%10);
printf("%d\n",b);
goto xy;
}
else if(a<7)
{
b=7-(a%10);
printf("%d\n",b);
goto xy;
}
a=x+y+1;

``````    ab:
if(a%10<=1)
{
b=1-(a%10);
a=a+b;
for(j=1;;j++)
{for(i=3;i*i<=a;i++)
{
flag=0;
if(a%i==0)
{
flag=1;
break;
}

}
if(flag==0)
{
ans=a-x-y;
printf("%d\n",ans);
goto xy;
}
if(j%3==1 || j%3==0)
a+=2;
else if(j%3==2)
a+=4;
}
}

else if(a%10<=3)
{
b=3-(a%10);
a=a+b;
for(i=3;i*i<=a;i++)
{
flag=0;
if(a%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
ans=a-x-y;
printf("%d\n",ans);
goto xy;
}
a+=4;
for(i=3;i*i<=a;i++)
{
flag=0;
if(a%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
ans=a-x-y;
printf("%d\n",ans);
goto xy;
}
a+=2;
for(i=3;i*i<=a;i++)
{
flag=0;
if(a%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
ans=a-x-y;
printf("%d\n",ans);
goto xy;
}
a+=2;
goto ab;
}

else if(a%10<=7)
{
b=7-(a%10);
a=a+b;
for(i=3;i*i<=a;i++)
{
flag=0;
if(a%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
ans=a-x-y;
printf("%d\n",ans);
goto xy;
}
a+=2;
for(i=3;i*i<=a;i++)
{
flag=0;
if(a%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
ans=a-x-y;
printf("%d\n",ans);
goto xy;
}
a+=2;
goto ab;
}

else if(a%10<=9)
{
b=9-(a%10);
a=a+b;
for(i=3;i*i<=a;i++)
{
flag=0;
if(a%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
ans=a-x-y;
printf("%d\n",ans);
goto xy;
}
a+=2;
goto ab;
}
xy:
t--;
}
return 0;
``````

}

Your algorithm seems to be wrong. Take a look at this code.This is my code. I think you will get the idea. It is easy and for more details check this editiorial

1 Like

let me look. hehe after reading the code i was like o.O

One advice that i can give you is, (i hope that you are just new to the world of programming) it is better not to use ‘goto’ in your code. it is not a good practice as you go further in the world of programming. You will not be able to de-bug your code easily. Take a look at this post
I wish you all the success in the world of programming

1 Like

Here is your debugged code. I have made some major changes over there. But i have commented it very well so that you will understand it well. If you have any-doubt you are free to ask me

Happy Coding

1 Like

If you understood my answer can you please accept it so that we can close the question ?

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