제출 #1084836

#제출 시각아이디문제언어결과실행 시간메모리
1084836Timosh9월 (APIO24_september)C++17
100 / 100
126 ms10056 KiB
#include <bits/stdc++.h> using namespace std; // #include "september.h" int solve(int N, int M, vector<int> F, vector<vector<int>> S) { vector<int> freq(N); int ans = 0; for (int i = 1; i < N; i++) freq[F[i]]++; map<int, int> mp; int cnt = 0; set<int> need; for (int i = 0; i < N - 1; i++) { for (int j = 0; j < M; j++) { mp[S[j][i]]++; if (mp[S[j][i]] == 1) cnt++; if (mp[S[j][i]] == M) cnt--; } if (cnt == 0) { for (auto &[key, val] : mp) { freq[F[key]]--; if (freq[F[key]] == 0) need.erase(F[key]); if (freq[key] != 0) need.insert(key); } ans += need.size() == 0; mp.clear(); } } return ans; }
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