#include<cstdio> int main() { int n,ai,ones; ones=0; scanf("%d",&n); for(int i=0; i<n; ++i) { scanf("%d",&ai); if(ai==1) ones++; if(ones >=2) break; } if(ones >=2) printf("%d\n",0); else if(ones == 1) printf("%d\n",1); else printf("%d\n",2); printf("%d\n",2); printf("%d %d\n",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> int main() { int n,ai,ones; ones=0; scanf("%d",&n); for(int i=0; i<n; ++i) { scanf("%d",&ai); if(ai==1) ones++; if(ones >=2) break; } if(ones >=2) printf("%d\n",0); else if(ones == 1) printf("%d\n",1); else printf("%d\n",2); printf("%d\n",2); printf("%d %d\n",1,2); return 0; } |