#include <cstdio> #include <iostream> using namespace std; int main() { int n,a,m=0; scanf("%d",&n); for(int i=0; i<n; i++) { scanf("%d",&a); if(a==1) m++; } if(m>1) cout<<0<<endl<<2<<endl<<1<<" "<<2; else if(m==1) cout<<1<<endl<<2<<endl<<1<<" "<<2; else cout<<2<<endl<<2<<endl<<1<<" "<<2; return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #include <cstdio> #include <iostream> using namespace std; int main() { int n,a,m=0; scanf("%d",&n); for(int i=0; i<n; i++) { scanf("%d",&a); if(a==1) m++; } if(m>1) cout<<0<<endl<<2<<endl<<1<<" "<<2; else if(m==1) cout<<1<<endl<<2<<endl<<1<<" "<<2; else cout<<2<<endl<<2<<endl<<1<<" "<<2; return 0; } |