#includeusing namespace std;int main(){ int n = 0, days = 0; cin>>n; while(true){ n = n - (n / 2 + 2); days++; if(n <= 0) break; } cout<return 0;}
#include int main(){ int n,ans=0; scanf("%d",&n); while(n>0){n-=n/2+2;ans++;}printf("%d\n",ans); return 0;}