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Submission #762823

# Submission time Handle Problem Language Result Execution time Memory
762823 2023-06-21T20:05:53 Z rainboy Travelling Merchant (CCO21_day2problem1) C
25 / 25
 284 ms 39300 KB 
#include <stdio.h>
#include <stdlib.h>

#define N	200000
#define M	200000
#define INF	0x3f3f3f3f

int max(int a, int b) { return a > b ? a : b; }

int *eh[N], eo[N], *fh[N], fo[N], dd[N], n;
int ii[M], jj[M], ww[M], xx[M], yy[M], m;

void append(int **eh, int *eo, int i, int h) {
	int o = eo[i]++;

	if (o >= 2 && (o & o - 1) == 0)
		eh[i] = (int *) realloc(eh[i], o * 2 * sizeof *eh[i]);
	eh[i][o] = h;
}

int pq[N + M], *iq[N + 1], cnt[N + 1], mode;

int (*compare)(int, int);

int lt(int i, int j) {
	return mode < n ? xx[i - n] < xx[j - n] : dd[i] > dd[j];
}

int p2(int p) {
	return (p *= 2) > cnt[mode] ? 0 : (p < cnt[mode] && lt(iq[mode][p + 1], iq[mode][p]) ? p + 1 : p);
}

void pq_up(int i) {
	int p, q, j;

	for (p = pq[i]; (q = p / 2) && lt(i, j = iq[mode][q]); p = q)
		iq[mode][pq[j] = p] = j;
	iq[mode][pq[i] = p] = i;
}

void pq_dn(int i) {
	int p, q, j;

	for (p = pq[i]; (q = p2(p)) && lt(j = iq[mode][q], i); p = q)
		iq[mode][pq[j] = p] = j;
	iq[mode][pq[i] = p] = i;
}

void pq_add(int i) {
	pq[i] = ++cnt[mode], pq_up(i);
}

int pq_first() {
	return iq[mode][1];
}

int pq_remove_first() {
	int i = iq[mode][1], j = iq[mode][cnt[mode]--];

	if (j != i)
		pq[j] = 1, pq_dn(j);
	pq[i] = 0;
	return i;
}

int main() {
	int h, i, j, x, y, o;

	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++) {
		eh[i] = (int *) malloc(2 * sizeof *eh[i]);
		fh[i] = (int *) malloc(2 * sizeof *fh[i]);
	}
	for (h = 0; h < m; h++) {
		scanf("%d%d%d%d", &i, &j, &x, &y), i--, j--;
		ii[h] = i, jj[h] = j, xx[h] = x, yy[h] = y;
		append(eh, eo, i, h), append(fh, fo, j, h);
	}
	for (i = 0; i < n; i++) {
		mode = i;
		iq[mode] = (int *) malloc((eo[i] + 1) * sizeof *iq[mode]);
		for (o = eo[i]; o--; ) {
			h = eh[i][o];
			pq_add(n + h);
		}
		dd[i] = cnt[i] == 0 ? INF : xx[pq_first() - n];
	}
	mode = n;
	iq[mode] = (int *) malloc((n + 1) * sizeof *iq[mode]);
	for (i = 0; i < n; i++)
		pq_add(i);
	while (cnt[mode = n]) {
		j = pq_remove_first();
		for (o = fo[j]; o--; ) {
			h = fh[j][o], i = ii[h];
			xx[h] = max(xx[h], dd[j] == INF ? INF : dd[j] - yy[h]);
			mode = i, pq_dn(n + h);
			dd[i] = cnt[i] == 0 ? INF : xx[pq_first() - n];
			mode = n, pq_up(i);
		}
	}
	for (i = 0; i < n; i++)
		printf("%d ", dd[i] == INF ? -1 : dd[i]);
	printf("\n");
	return 0;
}

Compilation message

Main.c: In function 'append':
Main.c:16:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   16 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
Main.c: In function 'main':
Main.c:69:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:75:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |   scanf("%d%d%d%d", &i, &j, &x, &y), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 480 KB Output is correct
6 Correct 1 ms 564 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 2 ms 724 KB Output is correct
9 Correct 2 ms 688 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 2 ms 724 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 284 ms 32996 KB Output is correct
2 Correct 216 ms 32916 KB Output is correct
3 Correct 62 ms 7680 KB Output is correct
4 Correct 46 ms 29596 KB Output is correct
5 Correct 154 ms 24216 KB Output is correct
6 Correct 157 ms 24244 KB Output is correct
7 Correct 70 ms 11172 KB Output is correct
8 Correct 247 ms 39240 KB Output is correct
9 Correct 255 ms 38128 KB Output is correct
10 Correct 61 ms 10288 KB Output is correct
11 Correct 146 ms 22696 KB Output is correct
12 Correct 55 ms 9100 KB Output is correct
13 Correct 51 ms 8320 KB Output is correct
14 Correct 262 ms 39144 KB Output is correct
15 Correct 253 ms 39148 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 480 KB Output is correct
6 Correct 1 ms 564 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 2 ms 724 KB Output is correct
9 Correct 2 ms 688 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 2 ms 724 KB Output is correct
15 Correct 284 ms 32996 KB Output is correct
16 Correct 216 ms 32916 KB Output is correct
17 Correct 62 ms 7680 KB Output is correct
18 Correct 46 ms 29596 KB Output is correct
19 Correct 154 ms 24216 KB Output is correct
20 Correct 157 ms 24244 KB Output is correct
21 Correct 70 ms 11172 KB Output is correct
22 Correct 247 ms 39240 KB Output is correct
23 Correct 255 ms 38128 KB Output is correct
24 Correct 61 ms 10288 KB Output is correct
25 Correct 146 ms 22696 KB Output is correct
26 Correct 55 ms 9100 KB Output is correct
27 Correct 51 ms 8320 KB Output is correct
28 Correct 262 ms 39144 KB Output is correct
29 Correct 253 ms 39148 KB Output is correct
30 Correct 260 ms 37768 KB Output is correct
31 Correct 223 ms 37748 KB Output is correct
32 Correct 64 ms 10444 KB Output is correct
33 Correct 40 ms 29560 KB Output is correct
34 Correct 181 ms 24268 KB Output is correct
35 Correct 139 ms 24264 KB Output is correct
36 Correct 68 ms 11216 KB Output is correct
37 Correct 249 ms 39300 KB Output is correct
38 Correct 227 ms 39116 KB Output is correct
39 Correct 58 ms 10388 KB Output is correct
40 Correct 147 ms 22732 KB Output is correct
41 Correct 58 ms 9196 KB Output is correct
42 Correct 53 ms 8268 KB Output is correct
43 Correct 254 ms 39124 KB Output is correct
44 Correct 253 ms 39220 KB Output is correct
45 Correct 253 ms 39144 KB Output is correct
46 Correct 127 ms 25172 KB Output is correct
47 Correct 130 ms 23256 KB Output is correct
48 Correct 115 ms 23628 KB Output is correct
49 Correct 179 ms 23548 KB Output is correct
50 Correct 0 ms 340 KB Output is correct