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#include <bits/stdc++.h>

using namespace std;

#define PB push_back
#define MP make_pair
#define fst first
#define snd second
#define int4 int32_t
#define LL long long
#define int LL
#define FOR(i,a,b) for (int i = (a); i != (b); i += ((a) < (b)) ? 1 : -1)
#define REP(b) FOR(i, 0, b)
#define ITER(b) for (auto i : (b))
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) ((int)(x).size())
#define VI vector<int>
#define PII pair<int,int>
#define LD long double

template<class C> void minu(C& a4, C b4) { a4 = min(a4, b4); }
template<class C> void maxu(C& a4, C b4) { a4 = max(a4, b4); }

template<class TH> void _dbg(const char *sdbg, TH h){cerr<<sdbg<<"="<<h<<"\n";}
template<class TH, class... TA> void _dbg(const char *sdbg, TH h, TA... a) {
    while(*sdbg!=',')cerr<<*sdbg++;cerr<<"="<<h<<","; _dbg(sdbg+1, a...);
}

template<class T> ostream &operator<<(ostream &os, vector<T> V){
    os<<"[";for(auto vv:V)os<<vv<<",";return os<<"]";
} 

template<class L, class R> ostream &operator<<(ostream &os, pair<L,R> P) {
    return os << "(" << P.fst << "," << P.snd << ")";
}


#ifdef LOCAL
#define debug(...) _dbg(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (__VA_ARGS__)
#define cerr if(0)cout
#endif

int32_t main()
{
    int n;
    scanf("%lld", &n);
    vector <int> jed, wiec;
    REP(n)
    {
        int a;
        scanf("%lld", &a);
        if(a==1) jed.PB(i+1);
        else wiec.PB(i+1);
        
    }
    if(SZ(jed)>=2)
    {
        printf("0\n2\n1 2\n");
        return 0;
    }
    if(SZ(jed)>=1)
    {
        printf("1\n2\n1 2\n");
        return 0;
    }
    if(SZ(jed)>=0)
    {
        printf("2\n2\n1 2\n");
        return 0;
    }
}