제출 #801932

#제출 시각아이디문제언어결과실행 시간메모리
801932vjudge1Long Mansion (JOI17_long_mansion)C++17
10 / 100
161 ms26604 KiB
#ifdef Home #define _GLIBCXX_DEBUG #endif // Home #include <bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; const int N = 5555; bool can[N][N]; int corr[N], have[N], T; vector < int > V[N]; main() { #ifdef Home freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); #endif // Home ios_base::sync_with_stdio(0); cin.tie(0); int n, q, a, b; cin >> n; for(int i = 1; i < n; ++ i) { cin >> corr[i]; } for(int k, i = 1; i <= n; ++ i) { cin >> k; V[i].resize(k); for(auto &j : V[i]) { cin >> j; } } for(int i = 1; i <= n; ++ i) { ++ T; int l = i - 1, r = i; for(auto &j : V[i]) { have[j] = T; } bool L = true, R = true; for(; L|R;) { L = R = false; for(; l && have[corr[l]] == T; -- l, L = true) { can[i][l] = true; for(auto &j : V[l]) { have[j] = T; } } for(; r < n && have[corr[r]] == T; R = true) { ++ r; can[i][r] = true; for(auto &j : V[r]) { have[j] = T; } } } } for(cin >> q; q --> 0;) { cin >> a >> b; cout << (can[a][b] ? "YES" : "NO") << '\n'; } }

컴파일 시 표준 에러 (stderr) 메시지

long_mansion.cpp:21:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   21 | main() {
      | ^~~~
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