제출 #938522

#제출 시각아이디문제언어결과실행 시간메모리
938522LucaIlieBoarding Passes (BOI22_passes)C++17
0 / 100
0 ms436 KiB
#include <bits/stdc++.h> using namespace std; double expectedInversions( int n ) { return (double)n * (n - 1) / 4; } int main() { int n; string s; cin >> s; n = s.size(); cout << expectedInversions( n / 2 ) + expectedInversions( n - n / 2 ); return 0; }
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