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Submission #503388

# Submission time Handle Problem Language Result Execution time Memory
503388 2022-01-07T19:14:30 Z rainboy Akcija (COCI21_akcija) C
90 / 110
 5000 ms 12536 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N	3000
#define K	3000
#define S	2000000000002LL

unsigned int X = 12345;

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

int ww[N], *ei[N], eo[N], n; int tt[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_first() { return iq[1]; }

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;
}

void greedy(char *used, int *dd, int *c__, long long *s__) {
	static int ii[N], jj[N];
	int i, t, o, c_;
	long long s_;

	memset(pq, 0, n * sizeof *pq), cnt = 0;
	memset(used, 0, n * sizeof *used);
	c_ = s_ = 0;
	for (t = n - 1; t >= 0; t--) {
		for (o = eo[t]; o--; ) {
			i = ei[t][o];
			if (tt[i] != -1)
				pq_add(i);
		}
		if (cnt) {
			i = pq_remove_first();
			ii[t] = i, jj[t] = cnt == 0 ? -1 : pq_first();
			c_++, s_ += ww[i], used[i] = 1;
		} else
			ii[t] = -1, jj[t] = -1;
	}
	for (t = 0; t < n; t++)
		if (ii[t] != -1)
			dd[ii[t]] = (jj[t] != -1 && used[jj[t]] ? dd[jj[t]] : 0)
				+ (jj[t] == -1 ? 0 : ww[jj[t]]) - ww[ii[t]];
	*c__ = c_, *s__ = s_;
}

char used[N][N]; int dd[N][N], n_;

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

	greedy(used[n_], dd[n_], &c, &s), n_++;
	if (c < c_ || c == c_ && s > s_) {
		n_--;
		return 0;
	}
	cc[k_] = c, ss[k_] = s;
	if (++k_ == k) {
		n_--;
		return 1;
	}
	for (i = 0; i < n; i++)
		if (used[n_ - 1][i] && tt[i] == 0) {
			int c2 = dd[n_ - 1][i] < 0 ? c - 1 : c;
			long long s2 = s + dd[n_ - 1][i];

			if (c2 > c_ || c2 == c_ && s2 <= s_) {
				int done;

				tt[i] = -1, done = branch(n, c_, s_), tt[i] = n_;
				if (done) {
					for (i = n - 1; i >= 0; i--)
						if (tt[i] == n_)
							tt[i] = 0;
					n_--;
					return 1;
				}
			}
		}
	for (i = n - 1; i >= 0; i--)
		if (tt[i] == n_)
			tt[i] = 0;
	n_--;
	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);
	}
	lower = -1, upper = (n + 2) * S;
	while (upper - lower > 1) {
		cs = (lower + upper) / 2, c = n - cs / S, s = cs % S;
		k_ = 0;
		if (branch(n, c, s))
			upper = cs;
		else
			lower = cs;
	}
	if (lower >= 0) {
		cs = lower, c = n - cs / S, s = cs % S;
		k_ = 0, branch(n, 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:120:24: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  120 |  if (c < c_ || c == c_ && s > s_) {
      |                ~~~~~~~~^~~~~~~~~
Main.c:134:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  134 |    if (c2 > c_ || c2 == c_ && s2 <= s_) {
      |                   ~~~~~~~~~^~~~~~~~~~~
Main.c: In function 'main':
Main.c:159:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  159 |  scanf("%d%d", &n, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:163:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  163 |   scanf("%d%d", &ww[i], &t), t--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

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

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 332 KB Output is correct
2 Correct 5 ms 332 KB Output is correct
3 Correct 4 ms 332 KB Output is correct
4 Correct 4 ms 332 KB Output is correct
5 Correct 4 ms 332 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 3 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 0 ms 332 KB Output is correct
14 Correct 8 ms 448 KB Output is correct
15 Correct 8 ms 460 KB Output is correct
16 Correct 7 ms 444 KB Output is correct
17 Correct 8 ms 344 KB Output is correct
18 Correct 7 ms 452 KB Output is correct
19 Correct 3 ms 332 KB Output is correct
20 Correct 3 ms 460 KB Output is correct
21 Correct 3 ms 472 KB Output is correct
22 Correct 3 ms 468 KB Output is correct
23 Correct 7 ms 460 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 12 ms 460 KB Output is correct
2 Correct 12 ms 460 KB Output is correct
3 Correct 11 ms 460 KB Output is correct
4 Correct 11 ms 448 KB Output is correct
5 Correct 11 ms 480 KB Output is correct
6 Correct 5 ms 460 KB Output is correct
7 Correct 4 ms 460 KB Output is correct
8 Correct 5 ms 460 KB Output is correct
9 Correct 5 ms 472 KB Output is correct
10 Correct 10 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 0 ms 332 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 416 KB Output is correct
2 Correct 45 ms 416 KB Output is correct
3 Correct 49 ms 396 KB Output is correct
4 Correct 43 ms 408 KB Output is correct
5 Correct 48 ms 416 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 40 ms 460 KB Output is correct
8 Correct 39 ms 428 KB Output is correct
9 Correct 34 ms 464 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 42 ms 396 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 688 KB Output is correct
2 Correct 15 ms 700 KB Output is correct
3 Correct 16 ms 668 KB Output is correct
4 Correct 14 ms 656 KB Output is correct
5 Correct 17 ms 704 KB Output is correct
6 Correct 7 ms 844 KB Output is correct
7 Correct 9 ms 1020 KB Output is correct
8 Correct 8 ms 972 KB Output is correct
9 Correct 10 ms 956 KB Output is correct
10 Correct 14 ms 680 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 6 ms 504 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 332 KB Output is correct
2 Correct 5 ms 332 KB Output is correct
3 Correct 4 ms 332 KB Output is correct
4 Correct 4 ms 332 KB Output is correct
5 Correct 4 ms 332 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 3 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 0 ms 332 KB Output is correct
14 Correct 8 ms 448 KB Output is correct
15 Correct 8 ms 460 KB Output is correct
16 Correct 7 ms 444 KB Output is correct
17 Correct 8 ms 344 KB Output is correct
18 Correct 7 ms 452 KB Output is correct
19 Correct 3 ms 332 KB Output is correct
20 Correct 3 ms 460 KB Output is correct
21 Correct 3 ms 472 KB Output is correct
22 Correct 3 ms 468 KB Output is correct
23 Correct 7 ms 460 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 12 ms 460 KB Output is correct
28 Correct 12 ms 460 KB Output is correct
29 Correct 11 ms 460 KB Output is correct
30 Correct 11 ms 448 KB Output is correct
31 Correct 11 ms 480 KB Output is correct
32 Correct 5 ms 460 KB Output is correct
33 Correct 4 ms 460 KB Output is correct
34 Correct 5 ms 460 KB Output is correct
35 Correct 5 ms 472 KB Output is correct
36 Correct 10 ms 460 KB Output is correct
37 Correct 0 ms 332 KB Output is correct
38 Correct 0 ms 332 KB Output is correct
39 Correct 0 ms 332 KB Output is correct
40 Correct 53 ms 416 KB Output is correct
41 Correct 45 ms 416 KB Output is correct
42 Correct 49 ms 396 KB Output is correct
43 Correct 43 ms 408 KB Output is correct
44 Correct 48 ms 416 KB Output is correct
45 Correct 0 ms 332 KB Output is correct
46 Correct 40 ms 460 KB Output is correct
47 Correct 39 ms 428 KB Output is correct
48 Correct 34 ms 464 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 42 ms 396 KB Output is correct
53 Correct 17 ms 688 KB Output is correct
54 Correct 15 ms 700 KB Output is correct
55 Correct 16 ms 668 KB Output is correct
56 Correct 14 ms 656 KB Output is correct
57 Correct 17 ms 704 KB Output is correct
58 Correct 7 ms 844 KB Output is correct
59 Correct 9 ms 1020 KB Output is correct
60 Correct 8 ms 972 KB Output is correct
61 Correct 10 ms 956 KB Output is correct
62 Correct 14 ms 680 KB Output is correct
63 Correct 0 ms 332 KB Output is correct
64 Correct 0 ms 332 KB Output is correct
65 Correct 6 ms 504 KB Output is correct
66 Execution timed out 5057 ms 12536 KB Time limit exceeded
67 Halted 0 ms 0 KB -