oj.uz

Submission #673673

# Submission time Handle Problem Language Result Execution time Memory
673673 2022-12-21T16:16:24 Z rainboy Two Antennas (JOI19_antennas) C
100 / 100
 653 ms 37568 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N	200000
#define Q	200000
#define N_	(1 << 18)	/* N_ = pow2(ceil(log2(N))) */
#define INF	0x3f3f3f3f

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

int *eh[N], eo[N], *ei[N], eo_[N];

void append(int **ej, int *eo, 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;
}

int st[N_ * 2], mn[N_ * 2], lz[N_ * 2], h_, n_;

void init() {
	int i;

	for (i = 1; i < n_ * 2; i++)
		st[i] = -INF, mn[i] = INF, lz[i] = -INF;
}

void put(int i, int x) {
	lz[i] = max(lz[i], x);
	st[i] = max(st[i], lz[i] == -INF || mn[i] == INF ? -INF : lz[i] - mn[i]);
}

void pus(int i) {
	if (lz[i] != -INF)
		put(i << 1 | 0, lz[i]), put(i << 1 | 1, lz[i]), lz[i] = -INF;
}

void pul(int i) {
	if (lz[i] == -INF) {
		int l = i << 1, r = l | 1;

		st[i] = max(st[l], st[r]);
		mn[i] = min(mn[l], mn[r]);
	}
}

void push(int i) {
	int h;

	for (h = h_; h > 0; h--)
		pus(i >> h);
}

void pull(int i) {
	while (i > 1)
		pul(i >>= 1);
}

void update1(int i, int x) {
	i += n_;
	push(i);
	st[i] = -INF, mn[i] = x, lz[i] = -INF;
	pull(i);
}

void update2(int l, int r, int x) {
	int l_ = l += n_, r_ = r += n_;

	push(l_), push(r_);
	for ( ; l <= r; l >>= 1, r >>= 1) {
		if ((l & 1) == 1)
			put(l++, x);
		if ((r & 1) == 0)
			put(r--, x);
	}
	pull(l_), pull(r_);
}

void update3(int i) {
	i += n_;
	push(i);
	st[i] = lz[i] == -INF || mn[i] == INF ? -INF : lz[i] - mn[i], mn[i] = INF;
	pull(i);
}

int query(int l, int r) {
	int x;

	push(l += n_), push(r += n_);
	x = -INF;
	for ( ; l <= r; l >>= 1, r >>= 1) {
		if ((l & 1) == 1)
			x = max(x, st[l++]);
		if ((r & 1) == 0)
			x = max(x, st[r--]);
	}
	return x;
}

int main() {
	static int yy[N], aa[N], bb[N], ll[Q], rr[Q], ans[Q];
	int n, q, h, i, r, t, o, o_;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		eh[i] = (int *) malloc(2 * sizeof *eh[i]);
	for (i = 0; i < n; i++)
		scanf("%d%d%d", &yy[i], &aa[i], &bb[i]);
	scanf("%d", &q);
	for (h = 0; h < q; h++) {
		scanf("%d%d", &ll[h], &rr[h]), ll[h]--, rr[h]--;
		append(eh, eo, rr[h], h);
	}
	for (i = 0; i < n; i++)
		ei[i] = (int *) malloc(2 * sizeof *ei[i]);
	for (i = 0; i < n; i++) {
		if (i + aa[i] < n)
			append(ei, eo_, i + aa[i], i << 1 | 0);
		if (i + bb[i] + 1 < n)
			append(ei, eo_, i + bb[i] + 1, i << 1 | 1);
	}
	h_ = 0;
	while (1 << h_ < n)
		h_++;
	n_ = 1 << h_;
	memset(ans, -1, q * sizeof *ans);
	for (t = 0; t < 2; t++) {
		init();
		for (r = 0; r < n; r++) {
			for (o_ = eo_[r]; o_--; ) {
				i = ei[r][o_];
				if ((i & 1) == 0)
					update1(i >> 1, yy[i >> 1]);
				else
					update3(i >> 1);
			}
			for (o = eo[r]; o--; ) {
				h = eh[r][o];
				ans[h] = max(ans[h], query(ll[h], r));
			}
			if (r - aa[r] >= 0)
				update2(max(r - bb[r], 0), r - aa[r], yy[r]);
			for (o = eo[r]; o--; ) {
				h = eh[r][o];
				ans[h] = max(ans[h], query(ll[h], r));
			}
		}
		for (i = 0; i < n; i++)
			yy[i] = -yy[i];
	}
	for (h = 0; h < q; h++)
		printf("%d\n", ans[h]);
	return 0;
}

Compilation message

antennas.c: In function 'append':
antennas.c:18:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   18 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
antennas.c: In function 'main':
antennas.c:108:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
antennas.c:112:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  112 |   scanf("%d%d%d", &yy[i], &aa[i], &bb[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
antennas.c:113:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  113 |  scanf("%d", &q);
      |  ^~~~~~~~~~~~~~~
antennas.c:115:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |   scanf("%d%d", &ll[h], &rr[h]), ll[h]--, rr[h]--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 428 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 292 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 428 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 292 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 85 ms 5388 KB Output is correct
26 Correct 14 ms 1108 KB Output is correct
27 Correct 137 ms 7548 KB Output is correct
28 Correct 131 ms 7588 KB Output is correct
29 Correct 86 ms 5388 KB Output is correct
30 Correct 95 ms 5288 KB Output is correct
31 Correct 97 ms 6736 KB Output is correct
32 Correct 128 ms 7584 KB Output is correct
33 Correct 121 ms 7160 KB Output is correct
34 Correct 70 ms 3920 KB Output is correct
35 Correct 122 ms 7456 KB Output is correct
36 Correct 126 ms 7628 KB Output is correct
37 Correct 70 ms 4008 KB Output is correct
38 Correct 143 ms 6692 KB Output is correct
39 Correct 19 ms 1356 KB Output is correct
40 Correct 119 ms 6680 KB Output is correct
41 Correct 91 ms 4988 KB Output is correct
42 Correct 161 ms 6616 KB Output is correct
43 Correct 44 ms 2572 KB Output is correct
44 Correct 117 ms 6676 KB Output is correct
45 Correct 23 ms 1748 KB Output is correct
46 Correct 149 ms 6692 KB Output is correct
47 Correct 40 ms 2056 KB Output is correct
48 Correct 119 ms 6636 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 309 ms 27492 KB Output is correct
2 Correct 324 ms 29772 KB Output is correct
3 Correct 246 ms 22832 KB Output is correct
4 Correct 343 ms 29824 KB Output is correct
5 Correct 139 ms 14088 KB Output is correct
6 Correct 340 ms 29820 KB Output is correct
7 Correct 273 ms 26716 KB Output is correct
8 Correct 343 ms 29816 KB Output is correct
9 Correct 44 ms 4776 KB Output is correct
10 Correct 316 ms 29824 KB Output is correct
11 Correct 174 ms 17980 KB Output is correct
12 Correct 360 ms 29824 KB Output is correct
13 Correct 269 ms 29956 KB Output is correct
14 Correct 255 ms 30016 KB Output is correct
15 Correct 212 ms 30116 KB Output is correct
16 Correct 259 ms 30272 KB Output is correct
17 Correct 299 ms 30108 KB Output is correct
18 Correct 246 ms 30168 KB Output is correct
19 Correct 257 ms 29944 KB Output is correct
20 Correct 231 ms 29808 KB Output is correct
21 Correct 236 ms 29660 KB Output is correct
22 Correct 290 ms 30008 KB Output is correct
23 Correct 242 ms 30140 KB Output is correct
24 Correct 270 ms 30124 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 428 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 292 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 85 ms 5388 KB Output is correct
26 Correct 14 ms 1108 KB Output is correct
27 Correct 137 ms 7548 KB Output is correct
28 Correct 131 ms 7588 KB Output is correct
29 Correct 86 ms 5388 KB Output is correct
30 Correct 95 ms 5288 KB Output is correct
31 Correct 97 ms 6736 KB Output is correct
32 Correct 128 ms 7584 KB Output is correct
33 Correct 121 ms 7160 KB Output is correct
34 Correct 70 ms 3920 KB Output is correct
35 Correct 122 ms 7456 KB Output is correct
36 Correct 126 ms 7628 KB Output is correct
37 Correct 70 ms 4008 KB Output is correct
38 Correct 143 ms 6692 KB Output is correct
39 Correct 19 ms 1356 KB Output is correct
40 Correct 119 ms 6680 KB Output is correct
41 Correct 91 ms 4988 KB Output is correct
42 Correct 161 ms 6616 KB Output is correct
43 Correct 44 ms 2572 KB Output is correct
44 Correct 117 ms 6676 KB Output is correct
45 Correct 23 ms 1748 KB Output is correct
46 Correct 149 ms 6692 KB Output is correct
47 Correct 40 ms 2056 KB Output is correct
48 Correct 119 ms 6636 KB Output is correct
49 Correct 309 ms 27492 KB Output is correct
50 Correct 324 ms 29772 KB Output is correct
51 Correct 246 ms 22832 KB Output is correct
52 Correct 343 ms 29824 KB Output is correct
53 Correct 139 ms 14088 KB Output is correct
54 Correct 340 ms 29820 KB Output is correct
55 Correct 273 ms 26716 KB Output is correct
56 Correct 343 ms 29816 KB Output is correct
57 Correct 44 ms 4776 KB Output is correct
58 Correct 316 ms 29824 KB Output is correct
59 Correct 174 ms 17980 KB Output is correct
60 Correct 360 ms 29824 KB Output is correct
61 Correct 269 ms 29956 KB Output is correct
62 Correct 255 ms 30016 KB Output is correct
63 Correct 212 ms 30116 KB Output is correct
64 Correct 259 ms 30272 KB Output is correct
65 Correct 299 ms 30108 KB Output is correct
66 Correct 246 ms 30168 KB Output is correct
67 Correct 257 ms 29944 KB Output is correct
68 Correct 231 ms 29808 KB Output is correct
69 Correct 236 ms 29660 KB Output is correct
70 Correct 290 ms 30008 KB Output is correct
71 Correct 242 ms 30140 KB Output is correct
72 Correct 270 ms 30124 KB Output is correct
73 Correct 486 ms 33268 KB Output is correct
74 Correct 419 ms 31076 KB Output is correct
75 Correct 478 ms 30292 KB Output is correct
76 Correct 653 ms 37564 KB Output is correct
77 Correct 308 ms 19500 KB Output is correct
78 Correct 509 ms 35184 KB Output is correct
79 Correct 556 ms 34380 KB Output is correct
80 Correct 619 ms 37564 KB Output is correct
81 Correct 246 ms 11856 KB Output is correct
82 Correct 469 ms 33908 KB Output is correct
83 Correct 436 ms 25568 KB Output is correct
84 Correct 644 ms 37568 KB Output is correct
85 Correct 402 ms 33976 KB Output is correct
86 Correct 494 ms 36556 KB Output is correct
87 Correct 265 ms 31640 KB Output is correct
88 Correct 522 ms 36912 KB Output is correct
89 Correct 447 ms 35040 KB Output is correct
90 Correct 510 ms 36744 KB Output is correct
91 Correct 319 ms 32528 KB Output is correct
92 Correct 518 ms 36484 KB Output is correct
93 Correct 308 ms 31376 KB Output is correct
94 Correct 457 ms 36512 KB Output is correct
95 Correct 298 ms 32192 KB Output is correct
96 Correct 508 ms 36676 KB Output is correct