Submission #999983

#	Time	Username	Problem	Language	Result	Execution time	Memory
999983		pudelos	Boarding Passes (BOI22_passes)	C++17	0 / 100	1 ms	600 KiB

passes

#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i=a; i<=b; ++i)
#define ll long long
#define ld long double

int main() {
  cin.tie(0) -> ios_base::sync_with_stdio(0);
  string s;
  cin >> s;
  int n = s.size();

  int l = n/2;
  int r = n/2+n%2;

  ll sum = l*(l-1) + r*(r-1);
  ld w = (ld)(sum)/4;
  cout << fixed << setprecision(15) << w << '\n';
}

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