#include <iostream.h>

const int max = 10010;

char *in;
int *par;
int *zf;
int *res;


int main(void)
    {
    in = new char[max];
    par=new int[max];
    zf=new int [max];
    res=new int [max];
    int N,i;
    cin >> N;
    for (i=0;i<N;i++) {in[i]=0;par[i]=-1;}
    for (i=0;i<N;i++) {
            cin >> zf[i];
            zf[i]=zf[i]%N;
            }

    int isok=0;

    for (i=0;i<N;i++)
        {
        if (in[zf[i]]==0) {in[zf[i]]=1;par[zf[i]]=i;}
        if (zf[i]==0) {isok=1; break;}
        for (int j=0;j<N;j++)
            {
            if (in[j]==0 || par[j]==i) continue;
            int t=j+zf[i];
            t=t%N;
            if (in[t]==0)
                {
                in[t]=1;
                par[t]=i;
                }
            if (t==0) {isok=1;break;}
            }
        if (isok) break;
        }

    if (isok==0) {int a=0; int b=i/a;cout << "0"; return 0;}
    int pos=0;
    int k=0;
    int l=k-zf[par[k]];
    if (l<0) l+=N;
    res[pos]=par[k];
    pos++;
    in[k]=0;
    k=l;
    while(1)
        {
        if (in[k]==0) break;
        l=k-zf[par[k]];
        if (l<0) l+=N;
        res[pos]=par[k];
        pos++;
        in[k]=0;
        k=l;
        }
    cout<<pos << "\n";

    for (i=pos-1;i>=0;i--) {cout << res[i]+1 << "\n";}

    delete in;
    delete par;
    delete zf;
    delete res;
    return 0;
    }

because of wrong technical output , u should read the task more
carefully :)
btw , after i modified ur program, it got Time Limit Exceeded :(