Submission #582531

#	Time	Username	Problem	Language	Result	Execution time	Memory
582531		silv723	Boarding Passes (BOI22_passes)	C++17	0 / 100	1 ms	212 KiB

passes

#include<bits/stdc++.h>
using namespace std;
using ll=long long;
ll f(ll n){
  if(n%2) return ((n-1)/2)*((n-1)/2);
  else return n/2*(n/2-1);
}
int main(){
  string s;
  cin>>s;
  ll n=s.size();
  double ans=0;
  for(ll i=3;i<=n;i++){
    ans+=(double)f(i)/(double)i;
  }
  cout<<ans<<endl;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 25
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40