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Submission #705225

# Submission time Handle Problem Language Result Execution time Memory
705225 2023-03-03T15:55:30 Z rainboy Abracadabra (CEOI22_abracadabra) C
100 / 100
 673 ms 46172 KB 
#include <stdio.h>
#include <stdlib.h>

#define N	200000
#define N_	(1 << 18)	/* N_ = pow2(ceil(log2(N))) */
#define Q	1000000

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

int *eh[N + 1], eo[N + 1];

void append(int t, int h) {
	int o = eo[t]++;

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

int st[N_ * 2], n_;

void pul(int i) {
	st[i] = st[i << 1 | 0] + st[i << 1 | 1];
}

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

int x, y, z;

void query(int k) {
	int i = 1;

	while (i < n_)
		if (k < st[i << 1 | 0])
			i = i << 1 | 0;
		else
			k -= st[i << 1 | 0], i = i << 1 | 1;
	x = i - n_, y = k, z = st[i];
}

int main() {
	static int aa[N], ii[N], nxt[N], qu[N], ii_[Q], ans[Q];
	int n, q, cnt, h, i, j, t, o;

	scanf("%d%d", &n, &q);
	for (i = 0; i < n; i++) {
		scanf("%d", &aa[i]), aa[i]--;
		ii[aa[i]] = i;
	}
	cnt = 0;
	for (i = n - 1; i >= 0; i--) {
		while (cnt && aa[i] > aa[qu[cnt - 1]])
			cnt--;
		nxt[i] = cnt == 0 ? n : qu[cnt - 1];
		qu[cnt++] = i;
	}
	for (t = 0; t <= n; t++)
		eh[t] = (int *) malloc(2 * sizeof *eh[t]);
	for (h = 0; h < q; h++) {
		scanf("%d%d", &t, &ii_[h]), ii_[h]--, t = min(t, n);
		append(t, h);
	}
	n_ = 1;
	while (n_ < n)
		n_ <<= 1;
	i = 0;
	while (i < n)
		update(aa[i], nxt[i] - i), i = nxt[i];
	for (t = 0; t <= n; t++) {
		for (o = eo[t]; o--; ) {
			h = eh[t][o];
			query(ii_[h]);
			ans[h] = aa[ii[x] + y] + 1;
		}
		query(n / 2);
		i = ii[x];
		update(x, y);
		for (j = i + y; j < i + z; j = nxt[j])
			update(aa[j], min(nxt[j], i + z) - j);
	}
	for (h = 0; h < q; h++)
		printf("%d\n", ans[h]);
	return 0;
}

Compilation message

Main.c: In function 'append':
Main.c:15:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   15 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
Main.c: In function 'main':
Main.c:49:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |  scanf("%d%d", &n, &q);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:51:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |   scanf("%d", &aa[i]), aa[i]--;
      |   ^~~~~~~~~~~~~~~~~~~
Main.c:64:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   scanf("%d%d", &t, &ii_[h]), ii_[h]--, t = min(t, n);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 320 ms 25216 KB Output is correct
2 Correct 344 ms 24104 KB Output is correct
3 Correct 323 ms 23512 KB Output is correct
4 Correct 238 ms 22836 KB Output is correct
5 Correct 289 ms 24796 KB Output is correct
6 Correct 253 ms 24100 KB Output is correct
7 Correct 289 ms 25552 KB Output is correct
8 Correct 271 ms 23428 KB Output is correct
9 Correct 249 ms 23428 KB Output is correct
10 Correct 254 ms 22740 KB Output is correct
11 Correct 286 ms 22692 KB Output is correct
12 Correct 233 ms 21160 KB Output is correct
13 Correct 263 ms 22488 KB Output is correct
14 Correct 275 ms 23872 KB Output is correct
15 Correct 248 ms 23108 KB Output is correct
16 Correct 1 ms 292 KB Output is correct
17 Correct 281 ms 21164 KB Output is correct
18 Correct 235 ms 21000 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 409 ms 44604 KB Output is correct
2 Correct 401 ms 44440 KB Output is correct
3 Correct 316 ms 36940 KB Output is correct
4 Correct 314 ms 36724 KB Output is correct
5 Correct 308 ms 37584 KB Output is correct
6 Correct 313 ms 36144 KB Output is correct
7 Correct 387 ms 43492 KB Output is correct
8 Correct 348 ms 41684 KB Output is correct
9 Correct 395 ms 37380 KB Output is correct
10 Correct 348 ms 40576 KB Output is correct
11 Correct 312 ms 35644 KB Output is correct
12 Correct 299 ms 35332 KB Output is correct
13 Correct 331 ms 39936 KB Output is correct
14 Correct 315 ms 36568 KB Output is correct
15 Correct 450 ms 41680 KB Output is correct
16 Correct 52 ms 13196 KB Output is correct
17 Correct 404 ms 38948 KB Output is correct
18 Correct 261 ms 31900 KB Output is correct
19 Correct 142 ms 18244 KB Output is correct
20 Correct 118 ms 19496 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 107 ms 9604 KB Output is correct
2 Correct 76 ms 9936 KB Output is correct
3 Correct 65 ms 9512 KB Output is correct
4 Correct 54 ms 9484 KB Output is correct
5 Correct 59 ms 9584 KB Output is correct
6 Correct 56 ms 9324 KB Output is correct
7 Correct 83 ms 9548 KB Output is correct
8 Correct 58 ms 9292 KB Output is correct
9 Correct 58 ms 9484 KB Output is correct
10 Correct 52 ms 9280 KB Output is correct
11 Correct 55 ms 9672 KB Output is correct
12 Correct 50 ms 9312 KB Output is correct
13 Correct 53 ms 9348 KB Output is correct
14 Correct 52 ms 9640 KB Output is correct
15 Correct 50 ms 9416 KB Output is correct
16 Correct 22 ms 6740 KB Output is correct
17 Correct 57 ms 9492 KB Output is correct
18 Correct 50 ms 8388 KB Output is correct
19 Correct 1 ms 292 KB Output is correct
20 Correct 1 ms 288 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 320 ms 25216 KB Output is correct
2 Correct 344 ms 24104 KB Output is correct
3 Correct 323 ms 23512 KB Output is correct
4 Correct 238 ms 22836 KB Output is correct
5 Correct 289 ms 24796 KB Output is correct
6 Correct 253 ms 24100 KB Output is correct
7 Correct 289 ms 25552 KB Output is correct
8 Correct 271 ms 23428 KB Output is correct
9 Correct 249 ms 23428 KB Output is correct
10 Correct 254 ms 22740 KB Output is correct
11 Correct 286 ms 22692 KB Output is correct
12 Correct 233 ms 21160 KB Output is correct
13 Correct 263 ms 22488 KB Output is correct
14 Correct 275 ms 23872 KB Output is correct
15 Correct 248 ms 23108 KB Output is correct
16 Correct 1 ms 292 KB Output is correct
17 Correct 281 ms 21164 KB Output is correct
18 Correct 235 ms 21000 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 409 ms 44604 KB Output is correct
22 Correct 401 ms 44440 KB Output is correct
23 Correct 316 ms 36940 KB Output is correct
24 Correct 314 ms 36724 KB Output is correct
25 Correct 308 ms 37584 KB Output is correct
26 Correct 313 ms 36144 KB Output is correct
27 Correct 387 ms 43492 KB Output is correct
28 Correct 348 ms 41684 KB Output is correct
29 Correct 395 ms 37380 KB Output is correct
30 Correct 348 ms 40576 KB Output is correct
31 Correct 312 ms 35644 KB Output is correct
32 Correct 299 ms 35332 KB Output is correct
33 Correct 331 ms 39936 KB Output is correct
34 Correct 315 ms 36568 KB Output is correct
35 Correct 450 ms 41680 KB Output is correct
36 Correct 52 ms 13196 KB Output is correct
37 Correct 404 ms 38948 KB Output is correct
38 Correct 261 ms 31900 KB Output is correct
39 Correct 142 ms 18244 KB Output is correct
40 Correct 118 ms 19496 KB Output is correct
41 Correct 107 ms 9604 KB Output is correct
42 Correct 76 ms 9936 KB Output is correct
43 Correct 65 ms 9512 KB Output is correct
44 Correct 54 ms 9484 KB Output is correct
45 Correct 59 ms 9584 KB Output is correct
46 Correct 56 ms 9324 KB Output is correct
47 Correct 83 ms 9548 KB Output is correct
48 Correct 58 ms 9292 KB Output is correct
49 Correct 58 ms 9484 KB Output is correct
50 Correct 52 ms 9280 KB Output is correct
51 Correct 55 ms 9672 KB Output is correct
52 Correct 50 ms 9312 KB Output is correct
53 Correct 53 ms 9348 KB Output is correct
54 Correct 52 ms 9640 KB Output is correct
55 Correct 50 ms 9416 KB Output is correct
56 Correct 22 ms 6740 KB Output is correct
57 Correct 57 ms 9492 KB Output is correct
58 Correct 50 ms 8388 KB Output is correct
59 Correct 1 ms 292 KB Output is correct
60 Correct 1 ms 288 KB Output is correct
61 Correct 673 ms 44876 KB Output is correct
62 Correct 654 ms 46172 KB Output is correct
63 Correct 640 ms 43828 KB Output is correct
64 Correct 552 ms 43808 KB Output is correct
65 Correct 587 ms 45604 KB Output is correct
66 Correct 526 ms 43584 KB Output is correct
67 Correct 509 ms 44844 KB Output is correct
68 Correct 485 ms 43176 KB Output is correct
69 Correct 521 ms 44336 KB Output is correct
70 Correct 465 ms 42196 KB Output is correct
71 Correct 415 ms 43300 KB Output is correct
72 Correct 478 ms 42344 KB Output is correct
73 Correct 440 ms 42700 KB Output is correct
74 Correct 458 ms 44336 KB Output is correct
75 Correct 482 ms 43568 KB Output is correct
76 Correct 51 ms 13132 KB Output is correct
77 Correct 435 ms 39244 KB Output is correct
78 Correct 321 ms 36856 KB Output is correct
79 Correct 0 ms 288 KB Output is correct
80 Correct 0 ms 340 KB Output is correct