#include "bits/stdc++.h"
#include "atcoder/all"
 
using namespace std;using namespace atcoder;
using lint=long long;using ll=lint;
lint mod=998244353;
lint inf64=1LL<<61;int inf32=1<<30;
//define endl "\n"
#define repp(i, m, n) for (int i = (int)m; i < (int)(n); i++)
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define vec vector
#define al(x) x.begin(),x.end()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define str string
#define ins insert
lint gcd(lint a, lint b){if(a<b)return gcd(b,a);if(a%b==0)return b;return gcd(b, a%b);}
using S=lint;
S op(S l, S r){
	return max(l,r);
}
S e(){
	return 0;
};
int pt(int i,int j){
	return 1000*i+j;
}
void me(dsu &d, int ui,int uj, int vi,int vj){
	d.merge(pt(ui,uj),pt(vi,vj));
}
vec<vec<pair<int,int>>>p;
int h,w,k;
void f(vec<pair<int,int>>&tmp){
	p.pb(tmp);
	repp(i,tmp[tmp.size()-1].se+1,h){
		repp(j,i+1,h){
			tmp.pb(mp(i,j));
			f(tmp);
			tmp.pop_back();
		}
	}
}

int main(){
	lint n;
	cin>>n;
	lint a[n];
	lint x=0;
	rep(i,n){
		cin>>a[i];
		x^=a[i];
	}
	bool turn;
	if(x==0){
		turn=false;
		cout<<0<<endl;
	}else{
		turn=true;
		cout<<1<<endl;
	}
	while(true){
		if(!turn){
			turn=true;
			lint i,k,r;
			cin>>i>>k>>r;
			i--;
			a[i]-=k;
			x^=k;
			if(r==0)continue;
			else return 0;
		}else{
			turn=false;
			rep(i,n){
				if(a[i]>=x){
					cout<<i+1<<" "<<x<<endl;
				}
				a[i]-=x;
				x=0;
				int r;
				cin>>r;
				if(r==-1)return 0;
			}
		}
	}
}