oj.uz

답안 #874817

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
874817 2023-11-17T21:02:16 Z rainboy Job Scheduling (IOI19_job) C++17
5 / 100
 3000 ms 45088 KB 
#include "job.h"
#include <cstdlib>
#include <vector>

using namespace std;

typedef vector<int> vi;

const int N = 200000;

unsigned int Z = 12345;

int rand_() {
	return (Z *= 3) >> 1;
}

int n;
int *ej[N], eo[N];

void append(int i, int j) {
	int o = eo[i]++;
	if (o >= 2 && (o & o - 1) == 0)
		ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
	ej[i][o] = j;
}

long long cross(int x1, int y1, int x2, int y2) {
	return (long long) x1 * y2 - (long long) x2 * y1;
}

int xx[N], yy[N];

int compare(int i, int j) {
	long long c = cross(xx[i], yy[i], xx[j], yy[j]);
	return c != 0 ? (c < 0 ? -1 : 1) : i - j;
}

int zz[N + 1], ll[N + 1], rr[N + 1], ii[N + 1], u_, l_, r_;

int node(int i) {
	static int _ = 1;
	zz[_] = rand_();
	ll[_] = rr[_] = 0;
	ii[_] = i;
	return _++;
}

void split(int u, int i) {
	if (u == 0) {
		u_ = l_ = r_ = 0;
		return;
	}
	int c = compare(ii[u], i);
	if (c < 0) {
		split(rr[u], i);
		rr[u] = l_, l_ = u;
	} else if (c > 0) {
		split(ll[u], i);
		ll[u] = r_, r_ = u;
	} else {
		u_ = u, l_ = ll[u], r_ = rr[u];
		ll[u] = rr[u] = 0;
	}
}

int merge(int u, int v) {
	if (u == 0)
		return v;
	if (v == 0)
		return u;
	if (zz[u] < zz[v]) {
		rr[u] = merge(rr[u], v);
		return u;
	} else {
		ll[v] = merge(u, ll[v]);
		return v;
	}
}

int first(int u) {
	return ll[u] == 0 ? u : first(ll[u]);
}

int remove_first(int u) {
	if (ll[u] == 0)
		return rr[u];
	ll[u] = remove_first(ll[u]);
	return u;
}

int merge_(int u, int v) {
	while (v) {
		int w = first(v);
		split(u, ii[w]);
		u = merge(merge(l_, w), r_);
		v = remove_first(v);
	}
	return u;
}

int sz[N], uu[N]; long long ans;

void dfs(int i) {
	sz[i] = 1, uu[i] = 0;
	for (int o = eo[i]; o--; ) {
		int j = ej[i][o];
		dfs(j);
		uu[i] = sz[i] > sz[j] ? merge_(uu[i], uu[j]) : merge_(uu[j], uu[i]);
		sz[i] += sz[j];
	}
	while (uu[i]) {
		int w = first(uu[i]);
		if (compare(i, ii[w]) < 0)
			break;
		ans += (long long) xx[i] * yy[ii[w]];
		xx[i] += xx[ii[w]], yy[i] += yy[ii[w]];
		uu[i] = remove_first(uu[i]);
	}
	uu[i] = merge(node(i), uu[i]);
}

long long scheduling_cost(vi pp, vi yy_, vi xx_) {
	n = pp.size();
	for (int i = 0; i < n; i++)
		xx[i] = xx_[i], yy[i] = yy_[i];
	for (int i = 0; i < n; i++)
		ej[i] = (int *) malloc(2 * sizeof *ej[i]), eo[i] = 0;
	for (int i = 1; i < n; i++)
		append(pp[i], i);
	ans = 0;
	for (int i = 0; i < n; i++)
		ans += (long long) xx[i] * yy[i];
	dfs(0);
	int x = 0;
	while (uu[0]) {
		int w = first(uu[0]);
		ans += (long long) x * yy[ii[w]], x += xx[ii[w]];
		uu[0] = remove_first(uu[0]);
	}
	for (int i = 0; i < n; i++)
		free(ej[i]);
	return ans;
}

Compilation message

job.cpp: In function 'void append(int, int)':
job.cpp:22:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   22 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6760 KB Output is correct
5 Correct 20 ms 16108 KB Output is correct
6 Correct 37 ms 25780 KB Output is correct
7 Correct 57 ms 35412 KB Output is correct
8 Correct 74 ms 44884 KB Output is correct
9 Correct 76 ms 44888 KB Output is correct
10 Correct 72 ms 45088 KB Output is correct
11 Correct 1 ms 6488 KB Output is correct
12 Correct 75 ms 45008 KB Output is correct
13 Correct 69 ms 44880 KB Output is correct
14 Correct 84 ms 45004 KB Output is correct
15 Correct 66 ms 44884 KB Output is correct
16 Correct 87 ms 44876 KB Output is correct
17 Correct 75 ms 44880 KB Output is correct
18 Correct 74 ms 44872 KB Output is correct
19 Correct 71 ms 44864 KB Output is correct
20 Correct 92 ms 44880 KB Output is correct

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Incorrect 1 ms 6492 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Incorrect 1 ms 6492 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Incorrect 70 ms 34124 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Execution timed out 3082 ms 6492 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6760 KB Output is correct
5 Correct 20 ms 16108 KB Output is correct
6 Correct 37 ms 25780 KB Output is correct
7 Correct 57 ms 35412 KB Output is correct
8 Correct 74 ms 44884 KB Output is correct
9 Correct 76 ms 44888 KB Output is correct
10 Correct 72 ms 45088 KB Output is correct
11 Correct 1 ms 6488 KB Output is correct
12 Correct 75 ms 45008 KB Output is correct
13 Correct 69 ms 44880 KB Output is correct
14 Correct 84 ms 45004 KB Output is correct
15 Correct 66 ms 44884 KB Output is correct
16 Correct 87 ms 44876 KB Output is correct
17 Correct 75 ms 44880 KB Output is correct
18 Correct 74 ms 44872 KB Output is correct
19 Correct 71 ms 44864 KB Output is correct
20 Correct 92 ms 44880 KB Output is correct
21 Correct 1 ms 6492 KB Output is correct
22 Incorrect 1 ms 6492 KB Output isn't correct
23 Halted 0 ms 0 KB -