oj.uz

Submission #503402

# Submission time Handle Problem Language Result Execution time Memory
503402 2022-01-07T20:15:38 Z rainboy Akcija (COCI21_akcija) C
110 / 110
 3365 ms 20880 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N	2000
#define K	2000
#define S	2000000000002LL

unsigned int X = 12345;

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

int ww[N], *ei[N], eo[N], n;

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

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

int cc[K], k_, k; long long ss[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] && ss[hh[j]] == ss[h])
				j++;
			else if (cc[hh[j]] > cc[h] || cc[hh[j]] == cc[h] && ss[hh[j]] < ss[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;
	}
}

int iq[1 + N], pq[N], cnt;

int lt(int i, int j) { return ww[i] < ww[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(int i) {
	pq[i] = ++cnt, pq_up(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 c1; long long s1;

void greedy(char *used) {
	int i, t, o;

	memset(used, 0, n * sizeof *used);
	cnt = 0, c1 = s1 = 0;
	for (t = n - 1; t >= 0; t--) {
		for (o = eo[t]; o--; ) {
			i = ei[t][o];
			pq_add(i);
		}
		if (cnt) {
			i = pq_remove_first();
			c1++, s1 += ww[i], used[i] = 1;
		}
	}
}

void get_subs(char *used, char *banned, int *sub) {
	static int kk[N];
	int i, i_, c, s, t, o;

	memset(kk, 0, n * sizeof *kk);
	c = 0;
	for (t = 0; t < n; t++)
		for (o = eo[t]; o--; ) {
			i = ei[t][o];
			if (used[i])
				kk[t]++, kk[c++]--;
		}
	for (t = n - 2; t >= 0; t--)
		kk[t] += kk[t + 1];
	for (s = n - 1, t = n - 1, i_ = -1; s >= 0; s--) {
		while (t >= s || kk[t + 1] > 0) {
			for (o = eo[t]; o--; ) {
				i = ei[t][o];
				if (!banned[i] && !used[i] && (i_ == -1 || ww[i_] > ww[i]))
					i_ = i;
			}
			t--;
		}
		for (o = eo[s]; o--; ) {
			i = ei[s][o];
			if (used[i])
				sub[i] = i_;
		}
	}
}

char used[N + 1][N], banned[N + 1][N]; int sub[N + 1][N], n_;

int branch(int n, int h, int c, long long s, int c_, long long s_) {
	int i;

	if (c < c_ || c == c_ && s > s_)
		return 0;
	get_subs(used[h], banned[h], sub[h]);
	cc[k_] = c, ss[k_] = s, k_++;
	if (k_ == k) {
		n_--;
		return 1;
	}
	memcpy(used[h + 1], used[h], n * sizeof *used[h]);
	memcpy(banned[h + 1], banned[h], n * sizeof *banned[h]);
	for (i = 0; i < n; i++)
		if (used[h + 1][i] == 1) {
			int j, c1;
			long long s1;

			used[h + 1][i] = 0, banned[h + 1][i] = 1;
			j = sub[h][i];
			if (j == -1)
				c1 = c - 1, s1 = s - ww[i];
			else {
				c1 = c, s1 = s - ww[i] + ww[j];
				used[h + 1][j] = 1;
			}
			if ((c1 > c_ || c1 == c_ && s1 <= s_) && branch(n, h + 1, c1, s1, c_, s_))
				return 1;
			used[h + 1][i] = -1, banned[h + 1][i] = 0;
			if (j != -1)
				used[h + 1][j] = 0;
		}
	return 0;
}

int main() {
	static int hh[K];
	int h, i, t, c;
	long long lower, upper, cs, s;

	scanf("%d%d", &n, &k);
	for (t = 0; t < n; t++)
		ei[t] = (int *) malloc(2 * sizeof *ei[t]);
	for (i = 0; i < n; i++) {
		scanf("%d%d", &ww[i], &t), t--;
		append(t, i);
	}
	greedy(used[0]);
	lower = -1, upper = (n + 2) * S;
	while (upper - lower > 1) {
		cs = (lower + upper) / 2, c = n - cs / S, s = cs % S;
		k_ = 0;
		if ((c1 > c || c1 == c && s1 <= s) && branch(n, 0, c1, s1, c, s))
			upper = cs;
		else
			lower = cs;
	}
	if (lower >= 0) {
		cs = lower, c = n - cs / S, s = cs % S;
		if (c1 > c || c1 == c && s1 <= s)
			k_ = 0, branch(n, 0, c1, s1, c, s);
	}
	cs = upper, c = n - cs / S, s = cs % S;
	while (k_ < k)
		cc[k_] = c, ss[k_] = s, k_++;
	for (h = 0; h < k; h++)
		hh[h] = h;
	sort(hh, 0, k);
	for (h = 0; h < k; h++)
		printf("%d %lld\n", cc[hh[h]], ss[hh[h]]);
	return 0;
}

Compilation message

Main.c: In function 'append':
Main.c:20:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   20 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
Main.c: In function 'sort':
Main.c:34:53: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   34 |    else if (cc[hh[j]] > cc[h] || cc[hh[j]] == cc[h] && ss[hh[j]] < ss[h]) {
      |                                  ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.c: In function 'branch':
Main.c:138:24: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  138 |  if (c < c_ || c == c_ && s > s_)
      |                ~~~~~~~~^~~~~~~~~
Main.c:161:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  161 |    if ((c1 > c_ || c1 == c_ && s1 <= s_) && branch(n, h + 1, c1, s1, c_, s_))
      |                    ~~~~~~~~~^~~~~~~~~~~
Main.c: In function 'main':
Main.c:187:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  187 |   if ((c1 > c || c1 == c && s1 <= s) && branch(n, 0, c1, s1, c, s))
      |                  ~~~~~~~~^~~~~~~~~~
Main.c:194:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  194 |   if (c1 > c || c1 == c && s1 <= s)
      |                 ~~~~~~~~^~~~~~~~~~
Main.c:175:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  175 |  scanf("%d%d", &n, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:179:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  179 |   scanf("%d%d", &ww[i], &t), t--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 3 ms 332 KB Output is correct
17 Correct 3 ms 332 KB Output is correct
18 Correct 2 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 0 ms 332 KB Output is correct
25 Correct 0 ms 332 KB Output is correct
26 Correct 0 ms 332 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 332 KB Output is correct
2 Correct 4 ms 380 KB Output is correct
3 Correct 3 ms 332 KB Output is correct
4 Correct 3 ms 424 KB Output is correct
5 Correct 6 ms 332 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 2 ms 460 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 432 KB Output is correct
2 Correct 30 ms 424 KB Output is correct
3 Correct 29 ms 452 KB Output is correct
4 Correct 30 ms 404 KB Output is correct
5 Correct 35 ms 424 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 30 ms 468 KB Output is correct
8 Correct 29 ms 460 KB Output is correct
9 Correct 30 ms 472 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 28 ms 424 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 716 KB Output is correct
2 Correct 6 ms 716 KB Output is correct
3 Correct 5 ms 716 KB Output is correct
4 Correct 5 ms 704 KB Output is correct
5 Correct 6 ms 716 KB Output is correct
6 Correct 5 ms 1064 KB Output is correct
7 Correct 8 ms 1100 KB Output is correct
8 Correct 4 ms 972 KB Output is correct
9 Correct 5 ms 972 KB Output is correct
10 Correct 4 ms 716 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 3 ms 460 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 3 ms 332 KB Output is correct
17 Correct 3 ms 332 KB Output is correct
18 Correct 2 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 0 ms 332 KB Output is correct
25 Correct 0 ms 332 KB Output is correct
26 Correct 0 ms 332 KB Output is correct
27 Correct 4 ms 332 KB Output is correct
28 Correct 4 ms 380 KB Output is correct
29 Correct 3 ms 332 KB Output is correct
30 Correct 3 ms 424 KB Output is correct
31 Correct 6 ms 332 KB Output is correct
32 Correct 2 ms 332 KB Output is correct
33 Correct 2 ms 332 KB Output is correct
34 Correct 2 ms 460 KB Output is correct
35 Correct 2 ms 332 KB Output is correct
36 Correct 2 ms 460 KB Output is correct
37 Correct 0 ms 332 KB Output is correct
38 Correct 1 ms 332 KB Output is correct
39 Correct 0 ms 332 KB Output is correct
40 Correct 31 ms 432 KB Output is correct
41 Correct 30 ms 424 KB Output is correct
42 Correct 29 ms 452 KB Output is correct
43 Correct 30 ms 404 KB Output is correct
44 Correct 35 ms 424 KB Output is correct
45 Correct 1 ms 460 KB Output is correct
46 Correct 30 ms 468 KB Output is correct
47 Correct 29 ms 460 KB Output is correct
48 Correct 30 ms 472 KB Output is correct
49 Correct 1 ms 460 KB Output is correct
50 Correct 0 ms 332 KB Output is correct
51 Correct 0 ms 332 KB Output is correct
52 Correct 28 ms 424 KB Output is correct
53 Correct 6 ms 716 KB Output is correct
54 Correct 6 ms 716 KB Output is correct
55 Correct 5 ms 716 KB Output is correct
56 Correct 5 ms 704 KB Output is correct
57 Correct 6 ms 716 KB Output is correct
58 Correct 5 ms 1064 KB Output is correct
59 Correct 8 ms 1100 KB Output is correct
60 Correct 4 ms 972 KB Output is correct
61 Correct 5 ms 972 KB Output is correct
62 Correct 4 ms 716 KB Output is correct
63 Correct 0 ms 332 KB Output is correct
64 Correct 1 ms 332 KB Output is correct
65 Correct 3 ms 460 KB Output is correct
66 Correct 3158 ms 11816 KB Output is correct
67 Correct 3365 ms 12308 KB Output is correct
68 Correct 3085 ms 11324 KB Output is correct
69 Correct 2953 ms 11168 KB Output is correct
70 Correct 3307 ms 12196 KB Output is correct
71 Correct 1488 ms 14804 KB Output is correct
72 Correct 1596 ms 20880 KB Output is correct
73 Correct 1234 ms 19828 KB Output is correct
74 Correct 1455 ms 19224 KB Output is correct
75 Correct 1712 ms 17124 KB Output is correct
76 Correct 0 ms 332 KB Output is correct
77 Correct 0 ms 332 KB Output is correct
78 Correct 53 ms 544 KB Output is correct