제출 #1215342

#제출 시각아이디문제언어결과실행 시간메모리
1215342wazj2024Arranging Shoes (IOI19_shoes)C++20
30 / 100
1099 ms145896 KiB
#include "shoes.h" #include "bits/stdc++.h" using namespace std; long long count_swaps(vector<int> s) { int n = s.size(); vector<bool> used(n, false); map<int, queue<int>> pos; for (int i = 0; i < n; ++i) { pos[s[i]].push(i); } long long swaps = 0; for (int i = 0; i < n; ++i) { if (used[i]) continue; int val = s[i]; int pair_pos = pos[-val].front(); pos[-val].pop(); used[i] = true; used[pair_pos] = true; int count_used = 0; for (int j = i + 1; j < pair_pos; ++j) { if (used[j]) count_used++; } swaps += pair_pos - i - 1 - count_used; if (val > 0) swaps++; } return swaps; }
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