제출 #824013

#제출 시각아이디문제언어결과실행 시간메모리
824013ttamxBoarding Passes (BOI22_passes)C++14
0 / 100
1 ms320 KiB
#include<bits/stdc++.h> using namespace std; typedef long double ld; const int G=20; const int N=1e5+5; int n,g; int main(){ cin.tie(nullptr)->sync_with_stdio(false); string s; cin >> s; n=s.size(); if(n%2==0){ cout << 0.5l*(n/2)*(n/2-1); }else{ cout << 0.5l*(1.l*(n/2)*(n/2-1)+(n/2)); } }
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