#include <bits/stdc++.h> using namespace std; long long n,a,j=0; int main() { scanf("%lld",&n); for (long long i=0; i<n; ++i) { scanf("%lld",&a); if (a==1) {++j;} } printf("%lld\n2\n1 2\n",2-min(j,(long long)2)); return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #include <bits/stdc++.h> using namespace std; long long n,a,j=0; int main() { scanf("%lld",&n); for (long long i=0; i<n; ++i) { scanf("%lld",&a); if (a==1) {++j;} } printf("%lld\n2\n1 2\n",2-min(j,(long long)2)); return 0; } |