제출 #168708

#제출 시각아이디문제언어결과실행 시간메모리
168708maruiiPort Facility (JOI17_port_facility)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; using pii = pair<int, int>; #define ff first #define ss second const int mod = 1e9 + 7; int mp(int x, int a) { if (a == 0) return 1; int ret = mp(x, a >> 1); if (a & 1) return 1ll * ret * ret % mod * x % mod; return 1ll * ret * ret % mod; } int N; pii P[1000005]; int idx[2000005]; const int SIZE = 1 << 21; struct ST { pii A[2 * SIZE]; void update(int x, int v) { x += SIZE; A[x] = {v, x - SIZE}; for (x >>= 1; x; x >>= 1) A[x] = max(A[x << 1], A[x << 1 | 1]); } pii query(int s, int e) { pii ret = {0, 0}; for (s += SIZE, e += SIZE; s <= e; s >>= 1, e >>= 1) { if ( s & 1) ret = max(ret, A[s++]); if (~e & 1) ret = max(ret, A[e--]); } return ret; } } seg1, seg2; bool vis[1000005], C[1000005]; vector<int> A, B; void dfs(int x) { if (C[x]) A.push_back(x); else B.push_back(x); vis[x] = 1; vector<int> v; while (1) { auto t = seg1.query(P[x].ff, P[x].ss); if (2 * N + 1 - t.ff > P[x].ff) break; seg1.update(t.ss, 0); seg2.update(2 * N + 1 - t.ff, 0); v.push_back(idx[2 * N + 1 - t.ff]); } while (1) { auto t = seg2.query(P[x].ff, P[x].ss); if (t.ff < P[x].ss) break; seg1.update(t.ff, 0); seg2.update(t.ss, 0); v.push_back(idx[t.ss]); } for (auto i : v) C[i] = C[x] ^ 1, dfs(i); } int main() { cin >> N; for (int i = 0; i < N; ++i) { int a, b; cin >> a >> b; P[i] = {a, b}; } sort(P, P + N); for (int i = 0; i < N; ++i) seg1.update(P[i].ss, 2 * N + 1 - P[i].ff), seg2.update(P[i].ff, P[i].ss), idx[P[i].ff] = i; int cnt = 0; for (int i = N - 1; i >= 0; --i) { if (vis[i]) continue; cnt++; seg1.update(P[i].ss, 0); seg2.update(P[i].ff, 0); dfs(i); } priority_queue<int, vector<int>, greater<int> > pq; sort(A.begin(), A.end()); sort(B.begin(), B.end()); for (auto i : A) { while (pq.size() && pq.top() < P[i].ff) pq.pop(); if (pq.size() && pq.top() < P[i].ss) return !printf("0"); pq.push(P[i].ss); } while (pq.size()) pq.pop(); for (auto i : B) { while (pq.size() && pq.top() < P[i].ff) pq.pop(); if (pq.size() && pq.top() < P[i].ss) return !printf("0"); pq.push(P[i].ss); } cout << mp(2, cnt); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

Compilation timeout while compiling port_facility