oj.uz

Submission #670866

# Submission time Handle Problem Language Result Execution time Memory
670866 2022-12-10T22:51:19 Z rainboy Treatment Project (JOI20_treatment) C
35 / 100
 404 ms 357384 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N	100000
#define LN	18	/* LN = ceil(log2(N * 2 + 1)) */
#define N_	(1 << LN)
#define N1	(N * 2 + N * (LN + 1) * 2)
#define INF	0x7fffffff
#define LINF	0x3f3f3f3f3f3f3f3fLL

unsigned int X = 12345;

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

int tt[N], ll[N], rr[N], cc[N], xx[N * 2], yy[N * 2];

int *zz;

void sort(int *ii, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, i_ = ii[l + rand_() % (r - l)], tmp;

		while (j < k) {
			int c = zz[ii[j]] != zz[i_] ? (zz[ii[j]] < zz[i_] ? -1 : 1) : (ii[j] & 1) - (i_ & 1);

			if (c == 0)
				j++;
			else if (c < 0) {
				tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
			}
		}
		sort(ii, l, i);
		l = k;
	}
}

int *ej[N1], *ew[N1], eo[N1], n1;

int newnode() {
	int i = n1++;

	ej[i] = (int *) malloc(2 * sizeof *ej[i]);
	ew[i] = (int *) malloc(2 * sizeof *ew[i]);
	return i;
}

void append(int i, int j, int w) {
	int o = eo[i]++;

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

int st[N_ * 2], n_;

void pul(int i) {
	int l = i << 1, r = l | 1;

	st[i] = newnode();
	if (st[l] != -1)
		append(st[i], st[l], 0);
	if (st[r] != -1)
		append(st[i], st[r], 0);
}

void update(int i, int u) {
	i += n_;
	st[i] = u << 1 | 0;
	while (i > 1)
		pul(i >>= 1);
}

void add_edges(int r, int i) {
	int l = 0;

	for (l += n_, r += n_; l <= r; l >>= 1, r >>= 1)
		if ((r & 1) == 0) {
			if (st[r] != -1)
				append(i << 1 | 1, st[r], 0);
			r--;
		}
}

long long dd[N_]; int iq[N_ + 1], pq[N_], cnt;

int lt(int i, int j) { return dd[i] < dd[j]; }

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

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

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

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

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

void pq_add_last(int i) {
	iq[pq[i] = ++cnt] = i;
}

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

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

int main() {
	static int ii[N * 2];
	int n, x_, h, i, o;

	scanf("%d%d", &x_, &n);
	for (i = 0; i < n; i++) {
		scanf("%d%d%d%d", &tt[i], &ll[i], &rr[i], &cc[i]), ll[i]--;
		if (ll[i] == 0)
			xx[i << 1 | 0] = -INF, yy[i << 1 | 0] = -INF;
		else
			xx[i << 1 | 0] = ll[i] - tt[i], yy[i << 1 | 0] = ll[i] + tt[i];
		if (rr[i] == x_)
			xx[i << 1 | 1] = INF, yy[i << 1 | 1] = INF;
		else
			xx[i << 1 | 1] = rr[i] - tt[i], yy[i << 1 | 1] = rr[i] + tt[i];
	}
	for (i = 0; i < n; i++) {
		newnode(), newnode();
		append(i << 1 | 0, i << 1 | 1, cc[i]);
	}
	for (i = 0; i < n * 2; i++)
		ii[i] = i;
	zz = xx, sort(ii, 0, n * 2);
	for (i = 0; i < n * 2; i++)
		xx[ii[i]] = i;
	zz = yy, sort(ii, 0, n * 2);
	n_ = 1;
	while (n_ < n * 2 + 1)
		n_ <<= 1;
	memset(st, -1, n_ * 2 * sizeof *st);
	for (h = 0; h < n * 2; h++) {
		i = ii[h];
		if ((i & 1) == 0)
			update(xx[i], i >> 1);
		else
			add_edges(xx[i], i >> 1);
	}
	cnt = 0;
	memset(dd, 0x3f, n1 * sizeof *dd);
	for (i = 0; i < n; i++)
		if (ll[i] == 0)
			dd[i << 1 | 0] = 0, pq_add_last(i << 1 | 0);
	while (cnt) {
		i = pq_remove_first();
		if (i < n * 2 && (i & 1) != 0 && rr[i >> 1] == x_) {
			printf("%lld\n", dd[i]);
			return 0;
		}
		for (o = eo[i]; o--; ) {
			int j = ej[i][o];
			long long w = ew[i][o], d = dd[i] + w;

			if (dd[j] > d) {
				if (dd[j] == LINF)
					pq_add_last(j);
				dd[j] = d, pq_up(j);
			}
		}
	}
	printf("-1\n");
	return 0;
}

Compilation message

treatment.c: In function 'append':
treatment.c:57:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   57 |  if (o >= 2 && (o & o - 1) == 0) {
      |                     ~~^~~
treatment.c: In function 'main':
treatment.c:135:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  135 |  scanf("%d%d", &x_, &n);
      |  ^~~~~~~~~~~~~~~~~~~~~~
treatment.c:137:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  137 |   scanf("%d%d%d%d", &tt[i], &ll[i], &rr[i], &cc[i]), ll[i]--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 404 ms 357384 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 352 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 352 KB Output is correct
20 Correct 16 ms 8256 KB Output is correct
21 Correct 15 ms 8160 KB Output is correct
22 Correct 14 ms 8276 KB Output is correct
23 Correct 13 ms 8180 KB Output is correct
24 Correct 17 ms 8212 KB Output is correct
25 Correct 21 ms 8280 KB Output is correct
26 Correct 17 ms 8240 KB Output is correct
27 Correct 12 ms 8280 KB Output is correct
28 Correct 14 ms 8260 KB Output is correct
29 Correct 16 ms 8208 KB Output is correct
30 Correct 10 ms 8020 KB Output is correct
31 Correct 10 ms 8020 KB Output is correct
32 Correct 14 ms 8276 KB Output is correct
33 Correct 17 ms 8140 KB Output is correct
34 Correct 14 ms 8276 KB Output is correct
35 Correct 12 ms 8140 KB Output is correct
36 Correct 12 ms 8296 KB Output is correct
37 Correct 13 ms 8276 KB Output is correct

Subtask #4
0 / 61.0

# Verdict Execution time Memory Grader output
1 Runtime error 404 ms 357384 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -