oj.uz

답안 #25565

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
25565 2017-06-23T05:21:58 Z youngyojun 버스 (JOI14_bus) C++11
100 / 100
 519 ms 31152 KB 
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <algorithm>
#include <vector>
#include <stack>
#include <deque>
#include <queue>
#include <set>
#include <map>
#include <unordered_map>
#include <bitset>
#include <string>
#define pb push_back
#define sz(V) ((int)(V).size())
#define allv(V) ((V).begin()),((V).end())
#define befv(V) ((V)[(sz(V)-2)])
#define sorv(V) sort(allv(V))
#define revv(V) reverse(allv(V))
#define univ(V) (V).erase(unique(allv(V)),(V).end())
#define clv(V) (V).clear()
#define upmin(a,b) (a)=min((a),(b))
#define upmax(a,b) (a)=max((a),(b))
#define rb(x) ((x)&(-(x)))
#define INF (1100000099)
#define INFLL (1100000000000000099ll)
#define MOD (1000000007)
#define MAXN (100005)
#define MAXM (300005)
#define MAXQ (100005)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, ll> pil;
typedef pair<ll, int> pli;
int uptwo[MAXN] = {1, };
struct SEG {
	int *d; int MX;
	void init(const int SZ) { MX = uptwo[SZ]; d = new int[MX*2]; fill(d, d+(MX*2), INF); }
	void upd(int X, int R) { for(X += MX; X; X /= 2) upmin(d[X], R); }
	int get(int S, int E) {
		int r = INF; for(S += MX, E += MX; S <= E; S /= 2, E /= 2) {
			if(S&1) upmin(r, d[S++]); if(~E&1) upmin(r, d[E--]);
		} return r;
	}
};

SEG seg[MAXN];
vector<int> VT[MAXN];
int AnsT[MAXM];
int A[MAXM], B[MAXM], X[MAXM], Y[MAXM], P[MAXM];
int XI[MAXM], YI[MAXM];
int QT[MAXQ], QP[MAXQ];
int Ans[MAXQ];
int N, M, Q;

int main() {
	for(int i = 1; i < MAXN; i++) uptwo[i] = uptwo[i/2]*2;
	scanf("%d%d", &N, &M);
	for(int i = 1; i <= M; i++) scanf("%d%d%d%d", &A[i], &B[i], &X[i], &Y[i]);
	for(int i = 1; i <= M; i++) { VT[A[i]].pb(X[i]); VT[B[i]].pb(Y[i]); }
	for(int i = 1; i <= M; i++) P[i] = i;
	sort(P+1, P+M+1, [&](const int& a, const int& b) -> bool {
		return Y[a] > Y[b];
	});
	for(int i = 1; i <= N; i++) { sorv(VT[i]); univ(VT[i]); }
	for(int i = 1; i < N; i++) seg[i].init(sz(VT[i]));
	for(int i = 1; i <= M; i++) {
		XI[i] = (int)(lower_bound(allv(VT[A[i]]), X[i]) - VT[A[i]].begin()) + 1;
		YI[i] = (int)(lower_bound(allv(VT[B[i]]), Y[i]) - VT[B[i]].begin()) + 1;
	}
	for(int ei = 1; ei <= M; ei++) {
		const int idx = P[ei];
		if(A[idx] == N) continue;
		else if(B[idx] == N) {
			seg[A[idx]].upd(XI[idx], Y[idx]);
		} else {
			const int ret = seg[B[idx]].get(YI[idx], sz(VT[B[idx]]));
			if(INF <= ret) continue;
			seg[A[idx]].upd(XI[idx], ret);
		}
	}
	for(int i = 1; i <= sz(VT[1]); i++) AnsT[i] = seg[1].get(i, i);
	for(int i = sz(VT[1])-1; i; i--) upmin(AnsT[i], AnsT[i+1]);
	scanf("%d", &Q); for(int i = 1; i <= Q; i++) scanf("%d", &QT[i]);
	for(int i = 1; i <= Q; i++) QP[i] = i;
	sort(QP+1, QP+Q+1, [&](const int& a, const int& b) -> bool { return QT[a] < QT[b]; });
	for(int qi = 1, i = 1; qi <= Q; qi++) {
		const int idx = QP[qi];
		for(; i <= sz(VT[1]) && AnsT[i] <= QT[idx]; i++);
		Ans[idx] = (1 == i) ? -1 : VT[1][i-2];
	}
	for(int i = 1; i <= Q; i++) printf("%d\n", Ans[i]);
	return 0;
}

Compilation message

bus.cpp: In function 'int main()':
bus.cpp:63:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
                       ^
bus.cpp:64:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 1; i <= M; i++) scanf("%d%d%d%d", &A[i], &B[i], &X[i], &Y[i]);
                                                                           ^
bus.cpp:89:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &Q); for(int i = 1; i <= Q; i++) scanf("%d", &QT[i]);
                 ^
bus.cpp:89:66: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &Q); for(int i = 1; i <= Q; i++) scanf("%d", &QT[i]);
                                                                  ^

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16872 KB Output is correct
2 Correct 0 ms 16872 KB Output is correct
3 Correct 0 ms 16872 KB Output is correct
4 Correct 0 ms 16872 KB Output is correct
5 Correct 0 ms 16872 KB Output is correct
6 Correct 0 ms 16872 KB Output is correct
7 Correct 0 ms 16872 KB Output is correct
8 Correct 0 ms 16872 KB Output is correct
9 Correct 0 ms 16872 KB Output is correct
10 Correct 0 ms 16872 KB Output is correct
11 Correct 0 ms 17004 KB Output is correct
12 Correct 3 ms 17004 KB Output is correct
13 Correct 0 ms 17004 KB Output is correct
14 Correct 3 ms 17004 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 16872 KB Output is correct
2 Correct 56 ms 16872 KB Output is correct
3 Correct 49 ms 16872 KB Output is correct
4 Correct 3 ms 16872 KB Output is correct
5 Correct 6 ms 16872 KB Output is correct
6 Correct 6 ms 16872 KB Output is correct
7 Correct 29 ms 16872 KB Output is correct
8 Correct 0 ms 16872 KB Output is correct
9 Correct 29 ms 16872 KB Output is correct
10 Correct 69 ms 17004 KB Output is correct
11 Correct 39 ms 17004 KB Output is correct
12 Correct 36 ms 17004 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 383 ms 31128 KB Output is correct
2 Correct 449 ms 31128 KB Output is correct
3 Correct 346 ms 31128 KB Output is correct
4 Correct 423 ms 31128 KB Output is correct
5 Correct 446 ms 31128 KB Output is correct
6 Correct 443 ms 31152 KB Output is correct
7 Correct 356 ms 27436 KB Output is correct
8 Correct 356 ms 30596 KB Output is correct
9 Correct 439 ms 31028 KB Output is correct
10 Correct 413 ms 29192 KB Output is correct
11 Correct 446 ms 29196 KB Output is correct
12 Correct 489 ms 29316 KB Output is correct
13 Correct 483 ms 29316 KB Output is correct
14 Correct 436 ms 29196 KB Output is correct
15 Correct 403 ms 29316 KB Output is correct
16 Correct 143 ms 24660 KB Output is correct
17 Correct 113 ms 24660 KB Output is correct

Subtask #4
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 463 ms 31128 KB Output is correct
2 Correct 453 ms 31128 KB Output is correct
3 Correct 509 ms 31128 KB Output is correct
4 Correct 453 ms 31128 KB Output is correct
5 Correct 459 ms 31128 KB Output is correct
6 Correct 376 ms 31152 KB Output is correct
7 Correct 403 ms 27436 KB Output is correct
8 Correct 489 ms 31028 KB Output is correct
9 Correct 486 ms 31028 KB Output is correct
10 Correct 519 ms 29192 KB Output is correct
11 Correct 466 ms 29196 KB Output is correct
12 Correct 456 ms 29192 KB Output is correct
13 Correct 479 ms 29316 KB Output is correct
14 Correct 506 ms 29196 KB Output is correct
15 Correct 456 ms 29316 KB Output is correct
16 Correct 173 ms 24660 KB Output is correct