Distracted judges

problem statement is here

#include<stdio.h>

int main(){

long a,b,c,d,i,j,t,n;

scanf("%ld",&t);

long ar[100005],br[100005],cr[100005]={0};

for(i=0;i<t;i++){

scanf("%ld",&ar[i]);

}

j=0;

br[j]=t;

j++;

a=1;

for(i=t-2;i>=0;i--){

if(ar[i]==a){

br[j++]=i;

cr[i]=1;

}else if(cr[i+ar[i]+1]==1){

br[j++]=i;

cr[i]++;

}

a++;

}

for(i=j-1;i>=0;i--){

if(br[i]!=0)

printf("%ld\n",br[i]);

}

return 0;

}