Escape from Stones

#include<stdio.h>
#include<string.h>
int main()
{
    char b[1000001];
    int a[1000001],i,t=0,n,k;
    scanf("%s",b);
    n=strlen(b);
    for(i=0;i<n;i++)
    {
        if(b[i]=='l'){a[t]=i+1;t++;}
        else printf("%d\n",i+1);
    }
    t--;
    for(;t>=0;t--)printf("%d\n",a[t]);
    
    return 0;

}

http://codeforces.com/contest/265/problem/C