oj.uz

Submission #684217

# Submission time Handle Problem Language Result Execution time Memory
684217 2023-01-20T17:15:00 Z rainboy Abduction 2 (JOI17_abduction2) C
100 / 100
 860 ms 5144 KB 
#include <stdio.h>
#include <string.h>

#define N	50000
#define M	50000
#define K	(N + M)

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

unsigned int X = 12345;

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

int aa[N], bb[M], cc[K], hh[K], n, m, k;

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

		while (j < k)
			if (cc[hh[j]] == cc[h])
				j++;
			else if (cc[hh[j]] < cc[h]) {
				tmp = hh[i], hh[i] = hh[j], hh[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = hh[j], hh[j] = hh[k], hh[k] = tmp;
			}
		sort(hh, l, i);
		l = k;
	}
}

long long solve(int i_, int j_) {
	static int iil[N], iir[N], jjl[M], jjr[M], iil_[M], iir_[M], jjl_[N], jjr_[N];
	static long long dpl[K], dpr[K];
	int nl, nr, ml, mr, h, h_, i, il, ir, j, jl, jr;
	long long x, ans;

	nl = 0;
	for (i = i_; i >= 0; i--)
		if (nl == 0 || aa[iil[nl - 1]] < aa[i])
			iil[nl++] = i;
	nr = 0;
	for (i = i_; i < n; i++)
		if (nr == 0 || aa[iir[nr - 1]] < aa[i])
			iir[nr++] = i;
	ml = 0;
	for (j = j_; j >= 0; j--)
		if (ml == 0 || bb[jjl[ml - 1]] < bb[j])
			jjl[ml++] = j;
	mr = 0;
	for (j = j_; j < m; j++)
		if (mr == 0 || bb[jjr[mr - 1]] < bb[j])
			jjr[mr++] = j;
	for (h = 0, il = ir = 0, jl = jr = 0; h < n + m; h++) {
		h_ = hh[h];
		if (h_ < n) {
			i = h_;
			while (jl < ml && bb[jjl[jl]] < cc[h_])
				jl++;
			while (jr < mr && bb[jjr[jr]] < cc[h_])
				jr++;
			jjl_[i] = jl == ml ? -1 : jjl[jl], jjr_[i] = jr == mr ? -1 : jjr[jr];
		} else {
			j = h_ - n;
			while (il < nl && aa[iil[il]] < cc[h_])
				il++;
			while (ir < nr && aa[iir[ir]] < cc[h_])
				ir++;
			iil_[j] = il == nl ? -1 : iil[il], iir_[j] = ir == nr ? -1 : iir[ir];
		}
	}
	memset(dpl, -1, k * sizeof *dpl), memset(dpr, -1, k * sizeof *dpr);
	if (aa[i_] > bb[j_])
		dpl[n + j_] = 0;
	else
		dpl[i_] = 0;
	ans = 0;
	for (h = 0; h < k; h++) {
		h_ = hh[h];
		if (h_ < n)
			i = h_;
		else
			j = h_ - n;
		if (h_ < n) {
			if ((x = dpl[h_]) != -1) {
				j = jjl_[i];
				if ((i_ = iil_[j]) == -1)
					ans = max(ans, x + i);
				else
					dpl[n + j] = max(dpl[n + j], x + i - i_);
				if ((i_ = iir_[j]) == -1)
					ans = max(ans, x + n - 1 - i);
				else
					dpr[n + j] = max(dpr[n + j], x + i_ - i);
			}
			if ((x = dpr[h_]) != -1) {
				j = jjr_[i];
				if ((i_ = iil_[j]) == -1)
					ans = max(ans, x + i);
				else
					dpl[n + j] = max(dpl[n + j], x + i - i_);
				if ((i_ = iir_[j]) == -1)
					ans = max(ans, x + n - 1 - i);
				else
					dpr[n + j] = max(dpr[n + j], x + i_ - i);
			}
		} else {
			if ((x = dpl[h_]) != -1) {
				i = iil_[j];
				if ((j_ = jjl_[i]) == -1)
					ans = max(ans, x + j);
				else
					dpl[i] = max(dpl[i], x + j - j_);
				if ((j_ = jjr_[i]) == -1)
					ans = max(ans, x + m - 1 - j);
				else
					dpr[i] = max(dpr[i], x + j_ - j);
			}
			if ((x = dpr[h_]) != -1) {
				i = iir_[j];
				if ((j_ = jjl_[i]) == -1)
					ans = max(ans, x + j);
				else
					dpl[i] = max(dpl[i], x + j - j_);
				if ((j_ = jjr_[i]) == -1)
					ans = max(ans, x + m - 1 - j);
				else
					dpr[i] = max(dpr[i], x + j_ - j);
			}
		}
	}
	return ans;
}

int main() {
	int q, h, i, j;

	scanf("%d%d%d", &n, &m, &q), k = n + m;
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]);
	for (j = 0; j < m; j++)
		scanf("%d", &bb[j]);
	for (h = 0; h < k; h++)
		cc[h] = h < n ? aa[h] : bb[h - n];
	for (h = 0; h < k; h++)
		hh[h] = h;
	sort(hh, 0, k);
	while (q--) {
		int i, i_, j, j_;
		long long ans;

		scanf("%d%d", &i, &j), i--, j--;
		ans = -1;
		i_ = i - 1;
		while (i_ >= 0 && aa[i_] < bb[j])
			i_--;
		if (i_ < 0)
			ans = max(ans, i);
		else
			ans = max(ans, i - i_ + solve(i_, j));
		i_ = i + 1;
		while (i_ < n && aa[i_] < bb[j])
			i_++;
		if (i_ >= n)
			ans = max(ans, n - 1 - i);
		else
			ans = max(ans, i_ - i + solve(i_, j));
		j_ = j - 1;
		while (j_ >= 0 && bb[j_] < aa[i])
			j_--;
		if (j_ < 0)
			ans = max(ans, j);
		else
			ans = max(ans, j - j_ + solve(i, j_));
		j_ = j + 1;
		while (j_ < m && bb[j_] < aa[i])
			j_++;
		if (j_ >= m)
			ans = max(ans, m - 1 - j);
		else
			ans = max(ans, j_ - j + solve(i, j_));
		printf("%lld\n", ans);
	}
	return 0;
}

Compilation message

abduction2.c: In function 'main':
abduction2.c:143:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  143 |  scanf("%d%d%d", &n, &m, &q), k = n + m;
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
abduction2.c:145:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  145 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~
abduction2.c:147:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  147 |   scanf("%d", &bb[j]);
      |   ^~~~~~~~~~~~~~~~~~~
abduction2.c:157:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  157 |   scanf("%d%d", &i, &j), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# 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 1 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 0 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 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 1 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 0 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 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 2 ms 468 KB Output is correct

Subtask #3
17.0 / 17.0

# 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 1 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 0 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 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 2 ms 468 KB Output is correct
23 Correct 35 ms 3748 KB Output is correct
24 Correct 42 ms 3804 KB Output is correct
25 Correct 37 ms 3748 KB Output is correct
26 Correct 35 ms 3720 KB Output is correct
27 Correct 41 ms 3724 KB Output is correct
28 Correct 26 ms 4028 KB Output is correct
29 Correct 25 ms 3888 KB Output is correct
30 Correct 30 ms 3924 KB Output is correct
31 Correct 31 ms 4124 KB Output is correct
32 Correct 29 ms 3904 KB Output is correct
33 Correct 26 ms 3796 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 468 KB Output is correct
2 Correct 28 ms 488 KB Output is correct
3 Correct 28 ms 476 KB Output is correct
4 Correct 26 ms 488 KB Output is correct
5 Correct 29 ms 468 KB Output is correct
6 Correct 21 ms 504 KB Output is correct
7 Correct 24 ms 496 KB Output is correct
8 Correct 32 ms 484 KB Output is correct
9 Correct 30 ms 468 KB Output is correct
10 Correct 32 ms 496 KB Output is correct
11 Correct 23 ms 496 KB Output is correct

Subtask #5
56.0 / 56.0

# 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 1 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 0 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 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 2 ms 468 KB Output is correct
23 Correct 35 ms 3748 KB Output is correct
24 Correct 42 ms 3804 KB Output is correct
25 Correct 37 ms 3748 KB Output is correct
26 Correct 35 ms 3720 KB Output is correct
27 Correct 41 ms 3724 KB Output is correct
28 Correct 26 ms 4028 KB Output is correct
29 Correct 25 ms 3888 KB Output is correct
30 Correct 30 ms 3924 KB Output is correct
31 Correct 31 ms 4124 KB Output is correct
32 Correct 29 ms 3904 KB Output is correct
33 Correct 26 ms 3796 KB Output is correct
34 Correct 30 ms 468 KB Output is correct
35 Correct 28 ms 488 KB Output is correct
36 Correct 28 ms 476 KB Output is correct
37 Correct 26 ms 488 KB Output is correct
38 Correct 29 ms 468 KB Output is correct
39 Correct 21 ms 504 KB Output is correct
40 Correct 24 ms 496 KB Output is correct
41 Correct 32 ms 484 KB Output is correct
42 Correct 30 ms 468 KB Output is correct
43 Correct 32 ms 496 KB Output is correct
44 Correct 23 ms 496 KB Output is correct
45 Correct 821 ms 3804 KB Output is correct
46 Correct 808 ms 3808 KB Output is correct
47 Correct 770 ms 3812 KB Output is correct
48 Correct 779 ms 3800 KB Output is correct
49 Correct 748 ms 3804 KB Output is correct
50 Correct 563 ms 4248 KB Output is correct
51 Correct 559 ms 4220 KB Output is correct
52 Correct 846 ms 4316 KB Output is correct
53 Correct 860 ms 5100 KB Output is correct
54 Correct 840 ms 5128 KB Output is correct
55 Correct 539 ms 5144 KB Output is correct
56 Correct 481 ms 4496 KB Output is correct
57 Correct 511 ms 4500 KB Output is correct
58 Correct 507 ms 4492 KB Output is correct
59 Correct 448 ms 4612 KB Output is correct