#include<bits/stdc++.h>
using namespace std;
long long n,m,k,c[100005],a[100005],b[100005],d[100005],e[100005],t;
int main(){
    freopen("Florr.in","r",stdin);
    freopen("Florr.out","w",stdout);
    cin>>n>>m>>k;
    for (long long i=1;i<=n;i++){
        cin>>c[i];
    }
    for (long long i=1;i<=m;i++){
        cin>>a[i]>>b[i];
        d[a[i]]=1;
    }
    long long s=k;
    for (long long i=m;i>=1;i--){
        if (k==0) break;
        if (c[a[i]]<c[b[i]]&&d[b[i]]==0){
            k--;
            e[++t]=i;
            d[a[i]]=0;
            d[b[i]]=1;
        }
    }
    cout<<s-k<<endl;
    for (long long i=1;i<=t;i++){
        cout<<e[i]<<endl;
    }
    return 0;
}