oj.uz

Submission #433308

# Submission time Handle Problem Language Result Execution time Memory
433308 2021-06-19T13:49:55 Z rainboy Archery (IOI09_archery) C
67 / 100
 607 ms 7944 KB 
#include <stdio.h>

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

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

int sum[N_ * 2], pref[N_ * 2], suf[N_ * 2], n1, n_;

void pul(int i) {
	int l = i << 1, r = l | 1;

	sum[i] = sum[l] + sum[r];
	pref[i] = min(pref[l], sum[l] + pref[r]);
	suf[i] = max(suf[l] + sum[r], suf[r]);
}

void build(int n) {
	int i;

	n1 = n;
	n_ = 1;
	while (n_ < n)
		n_ <<= 1;
	for (i = 0; i < n_; i++)
		if (i < n)
			sum[n_ + i] = pref[n_ + i] = suf[n_ + i] = -1;
	for (i = n_ - 1; i > 0; i--)
		pul(i);
}

int kk[N];

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

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

	x = y = 0;
	for (l = n_ + 0, r = n_ + i - 1; l <= r; l >>= 1, r >>= 1)
		if ((r & 1) == 0)
			x = max(x, suf[r] + y), y += sum[r], r--;
	x = max(x, suf[1] + y);
	for (l = n_ + i, r = n_ + n_ - 1; l <= r; l >>= 1, r >>= 1)
		if ((l & 1) == 1) {
			if (x + pref[l] <= 0) {
				i = l;
				while (i < n_)
					if (x + pref[i << 1 | 0] <= 0)
						i = i << 1 | 0;
					else
						x += sum[i << 1 | 0], i = i << 1 | 1;
				return i - n_;
			} else
				x += sum[l];
			l++;
		}
	if (x + pref[1] > 0)
		return -1;
	i = 1;
	while (i < n_)
		if (x + pref[i << 1 | 0] <= 0)
			i = i << 1 | 0;
		else
			x += sum[i << 1 | 0], i = i << 1 | 1;
	return i - n_;
}

int add(int i) {
	update(i, 1), kk[i]++;
	return query(i);
}

int delete(int i) {
	int j = query(i);

	update(i, -1), kk[i]--;
	return j;
}

int main() {
	static int aa[N * 2];
	int n, r, p, p_, i, i_, a_, mn;

	scanf("%d%d", &n, &r);
	for (i = 0; i < n * 2; i++)
		scanf("%d", &aa[i]), aa[i]--;
	build(n);
	a_ = aa[0];
	if (a_ == 0)
		i_ = n - 1;
	else if (a_ > n) {
		add(n - 1 - 0);
		for (i = 0; i < n * 2; i++)
			if (aa[i] > a_)
				add(n - 1 - (i / 2));
		p_ = n, i_ = -1;
		for (i = 0; i < n; i++) {
			if (i > 0) {
				if (aa[i * 2] > a_)
					delete(n - 1 - i), add(n - 1 - (i - 1));
				aa[(i - 1) * 2] = aa[i * 2], aa[i * 2] = a_;
			}
			p = n - 1 - add(n - 1 - i), delete(n - 1 - i);
			if (p_ >= p)
				p_ = p, i_ = i;
		}
	} else {
		for (i = 0; i < n * 2; i++)
			if (aa[i] < a_)
				add(i / 2);
		mn = 0;
		while (kk[mn] == 0)
			mn++;
		p_ = n, i_ = -1;
		for (i = 0; i < n; i++) {
			if (i > 0) {
				if (aa[i * 2] < a_) {
					delete(i), add(i - 1);
					if (mn == i)
						mn--;
				}
				aa[(i - 1) * 2] = aa[i * 2], aa[i * 2] = a_;
			}
			if (i < mn) {
				p = delete(mn);
				if (kk[mn] > 0)
					p ^= delete(mn), p ^= add((mn + 1) % n), delete((mn + 1) % n), add(mn);
				add(mn);
			} else if (i > mn) {
				int push;

				p = delete(mn), push = kk[mn] > 0;
				if (push)
					delete(mn), add((mn + 1) % n);
				p ^= add(i), delete(i);
				if (push)
					delete((mn + 1) % n), add(mn);
				add(mn);
			} else {
				if (i == 0)
					p = 0;
				else
					delete(mn), p = add((i + 1) % n), delete((i + 1) % n), add(mn);
			}
			p = (p - r % n + n) % n;
			if (p_ >= p)
				p_ = p, i_ = i;
		}
	}
	printf("%d\n", i_ + 1);
	return 0;
}

Compilation message

archery.c: In function 'main':
archery.c:91:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |  scanf("%d%d", &n, &r);
      |  ^~~~~~~~~~~~~~~~~~~~~
archery.c:93:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |   scanf("%d", &aa[i]), aa[i]--;
      |   ^~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Incorrect 3 ms 332 KB Output isn't correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct

Subtask #2
62.0 / 94.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Incorrect 1 ms 204 KB Output isn't correct
3 Incorrect 2 ms 332 KB Output isn't correct
4 Incorrect 22 ms 856 KB Output isn't correct
5 Correct 372 ms 7340 KB Output is correct
6 Incorrect 1 ms 204 KB Output isn't correct
7 Incorrect 1 ms 332 KB Output isn't correct
8 Correct 15 ms 856 KB Output is correct
9 Correct 31 ms 1160 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Incorrect 37 ms 1188 KB Output isn't correct
12 Correct 4 ms 332 KB Output is correct
13 Incorrect 524 ms 4708 KB Output isn't correct
14 Incorrect 12 ms 460 KB Output isn't correct
15 Correct 113 ms 1416 KB Output is correct
16 Incorrect 0 ms 204 KB Output isn't correct
17 Incorrect 3 ms 332 KB Output isn't correct
18 Correct 4 ms 332 KB Output is correct
19 Incorrect 7 ms 332 KB Output isn't correct
20 Incorrect 9 ms 520 KB Output isn't correct
21 Incorrect 28 ms 1140 KB Output isn't correct
22 Incorrect 76 ms 1356 KB Output isn't correct
23 Incorrect 607 ms 7464 KB Output isn't correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 5 ms 588 KB Output is correct
27 Correct 25 ms 1184 KB Output is correct
28 Correct 161 ms 4796 KB Output is correct
29 Correct 2 ms 332 KB Output is correct
30 Correct 5 ms 460 KB Output is correct
31 Correct 30 ms 1100 KB Output is correct
32 Correct 247 ms 7364 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 2 ms 332 KB Output is correct
36 Correct 3 ms 332 KB Output is correct
37 Correct 26 ms 1068 KB Output is correct
38 Correct 30 ms 1256 KB Output is correct
39 Correct 1 ms 204 KB Output is correct
40 Correct 1 ms 332 KB Output is correct
41 Correct 3 ms 332 KB Output is correct
42 Correct 3 ms 332 KB Output is correct
43 Correct 6 ms 460 KB Output is correct
44 Correct 11 ms 716 KB Output is correct
45 Correct 23 ms 1164 KB Output is correct
46 Correct 28 ms 1100 KB Output is correct
47 Correct 285 ms 7944 KB Output is correct