제출 #598615

#제출 시각아이디문제언어결과실행 시간메모리
598615someoneBoarding Passes (BOI22_passes)C++14
0 / 100
0 ms212 KiB
#include <bits/stdc++.h> #define int long long using namespace std; const int N = 2e5 + 42, MOD = 1e9 + 7; signed main() { ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); string str; cin >> str; int n = str.size(); int k = n-n/2; if(n % 2 == 0) { cout << (k*(k-1))/2.0; } else { cout << (k*k)/2.0; } }
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