#include<bits/stdc++.h> using namespace std; #define st first #define nd second #define mp make_pair #define pb push_back #define all(x) x.begin(), x.end() #define boost ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0) typedef long long lli; typedef pair<int, int> pii; typedef pair<lli, lli> pll; typedef pair<lli, int> pli; typedef pair<int, lli> pil; int n, a, jed=0; int main() { boost; cin>>n; for(int i=1;i<=n;i++) { cin>>a; if(a==1)jed++; } int x=2-min(jed, 2); cout<<x<<"\n"; cout<<2<<"\n"; cout<<1<<' '<<2<<"\n"; return 0; }
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 | #include<bits/stdc++.h> using namespace std; #define st first #define nd second #define mp make_pair #define pb push_back #define all(x) x.begin(), x.end() #define boost ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0) typedef long long lli; typedef pair<int, int> pii; typedef pair<lli, lli> pll; typedef pair<lli, int> pli; typedef pair<int, lli> pil; int n, a, jed=0; int main() { boost; cin>>n; for(int i=1;i<=n;i++) { cin>>a; if(a==1)jed++; } int x=2-min(jed, 2); cout<<x<<"\n"; cout<<2<<"\n"; cout<<1<<' '<<2<<"\n"; return 0; } |