FIRESCAPE..

can someone tell me what was wrong with my code for the firescape problem that was in the march long challenge…here is my code…

#include<stdio.h>
int f[3][100002];

int create(long int n){

long int i;

for(i=1;i<=n;i++){
    f[0][i]=0;
    f[2][i]=1;
}
return 0;

}
int main()
{

long int t,n,m,a,b,c,d,i;

long int sum=0,gp=0;
unsigned long long int prod=1;

scanf("%d",&t);

while(t--)
{
    scanf("%ld %ld",&n,&m);
    create(n);
    while(m--)
    {sum=0;
        gp=0;
        prod=1;
        scanf("%ld %ld",&a,&b);
        c=f[0][a]==0?a:b;
        d=a+b-c;
        
         while(f[0][c]!=0)
         {c=f[0][c];}
        sum=f[2][c];
        while(f[0][d]!=0)
        {d=f[0][d];}
        if(c==d)
        continue;
        f[2][d]+=sum;
        f[2][c]=1;
        f[0][c]=d;
    }
    for(i=1;i<=n;i++)
    {prod=(prod*f[2][i])%1000000007;
    if(f[0][i]==0)
    gp++;
    }
        printf("%ld %llu\n",gp,prod);
        
    }
    return 0;
}
//