1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <cstdio>
#include <iostream>
#include <cstdlib>
using namespace std;
int main()
{
int n;
int ile_jeden=0;
int liczba;
cin>>n;
for(int i=0;i<n;i++)
{
cin>>liczba;
if(liczba==1)
{
ile_jeden++;
}
}
if(ile_jeden>1)
{
cout<<0<<endl;
cout<<2<<endl;
cout<<1<<" "<<2<<endl;
}
if(ile_jeden==1)
{
cout<<1<<endl;
cout<<2<<endl;
cout<<1<<" "<<2<<endl;
}
if(ile_jeden==0)
{
cout<<2<<endl;
cout<<2<<endl;
cout<<1<<" "<<2<<endl;
}
return 0;
}
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