oj.uz

Submission #671338

# Submission time Handle Problem Language Result Execution time Memory
671338 2022-12-12T21:44:52 Z rainboy Hamburg Steak (JOI20_hamburg) C
15 / 100
 247 ms 6532 KB 
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>

#define N	200000
#define LN	18	/* N_ = pow2(ceil(log2(N))) */
#define N_	(N * (LN + 1) + 1)
#define K	4
#define INF	0x3f3f3f3f3f3f3f3fLL

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

unsigned int X = 12345;

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

long long xxl[N], xxr[N], yyl[N], yyr[N], xx[K], yy[K]; int n, k;

long long *zz;

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

		while (j < k)
			if (zz[ii[j]] == zz[i_])
				j++;
			else if (zz[ii[j]] < zz[i_]) {
				tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
			}
		sort(ii, l, i);
		l = k;
	}
}

long long *xl1, *xr1, *yl1, *yr1;

int ll_[N_], rr_[N_]; long long xxl_[N_], xxr_[N_], yyl_[N_], yyr_[N_];

int update(int t, int l, int r, int i, int i_) {
	static int _ = 1;
	int t_ = _++;

	ll_[t_] = ll_[t], rr_[t_] = rr_[t], xxl_[t_] = min(xxl_[t], xxr[i_]), xxr_[t_] = max(xxr_[t], xxl[i_]), yyl_[t_] = min(yyl_[t], yyr[i_]), yyr_[t_] = max(yyr_[t], yyl[i_]);
	if (r - l > 1) {
		int m = (l + r) / 2;

		if (i < m)
			ll_[t_] = update(ll_[t_], l, m, i, i_);
		else
			rr_[t_] = update(rr_[t_], m, r, i, i_);
	}
	return t_;
}

void query(int t, int l, int r, int ql, int qr) {
	int m;

	if (qr <= l || r <= ql || t == 0)
		return;
	if (ql <= l && r <= qr) {
		*xl1 = min(*xl1, xxl_[t]), *xr1 = max(*xr1, xxr_[t]), *yl1 = min(*yl1, yyl_[t]), *yr1 = max(*yr1, yyr_[t]);
		return;
	}
	m = (l + r) / 2;
	query(ll_[t], l, m, ql, qr), query(rr_[t], m, r, ql, qr);
}

int pierced(int i, int h_) {
	int h;

	for (h = 0; h < h_; h++)
		if (xxl[i] <= xx[h] && xx[h] <= xxr[i] && yyl[i] <= yy[h] && yy[h] <= yyr[i])
			return 1;
	return 0;
}

void solve(int h_) {
	int h, i;
	long long xl, xr, yl, yr;

	xl = INF, xr = -1, yl = INF, yr = -1;
	for (i = 0; i < n; i++)
		if (!pierced(i, h_))
			xl = min(xl, xxr[i]), xr = max(xr, xxl[i]), yl = min(yl, yyr[i]), yr = max(yr, yyl[i]);
	if (xl == INF) {
		for (h = h_; h < k; h++)
			xx[h] = 1, yy[h] = 1;
		for (h = 0; h < k; h++)
			printf("%lld %lld\n", xx[h], yy[h]);
		exit(0);
	} else if (h_ < k) {
		xx[h_] = xl, yy[h_] = yl, solve(h_ + 1);
		xx[h_] = xl, yy[h_] = yr, solve(h_ + 1);
		xx[h_] = xr, yy[h_] = yl, solve(h_ + 1);
		xx[h_] = xr, yy[h_] = yr, solve(h_ + 1);
	}
}

long long ll[N], rr[N], rr2[3][N]; int rr1[N];
int ii[3][N], nn[3], nn_[3], tt[3][N + 1]; long long xl, xr, yl, yr, z1, z2, z3, z4;

void query_(int g, long long l, long long r) {
	int lower, upper, l_, r_;

	lower = -1, upper = nn[g];
	while (upper - lower > 1) {
		int i = (lower + upper) / 2;

		if (ll[ii[g][i]] >= l)
			upper = i;
		else
			lower = i;
	}
	l_ = upper;
	lower = -1, upper = nn_[g];
	while (upper - lower > 1) {
		int i = (lower + upper) / 2;

		if (rr2[g][i] <= r)
			lower = i;
		else
			upper = i;
	}
	r_ = upper;
	query(tt[g][l_], 0, nn_[g], 0, r_);
}

void query1(long long *xx, int n, int g) {
	static int ii_[K + 2];
	int i;

	for (i = 0; i < n; i++)
		ii_[i] = i;
	zz = xx, sort(ii_, 0, n);
	for (i = 0; i + 1 < n; i++)
		query_(g, xx[ii_[i]] + 1, xx[ii_[i + 1]] - 1);
}

long long idx(long long x, long long y) {
	if (y == yl)
		return x - xl;
	if (x == xr)
		return z1 + y - yl;
	if (y == yr)
		return z2 + xr - x;
	if (x == xl)
		return z3 + yr - y;
	return -1;
}

void get_bounds(int h_) {
	static long long xx_[K + 2];
	int h;

	if (h_ == 0) {
		*xl1 = xl, *xr1 = xr, *yl1 = yl, *yr1 = yr;
		return;
	}
	*xl1 = INF, *xr1 = -1, *yl1 = INF, *yr1 = -1;
	xx_[0] = -1;
	for (h = 0; h < h_; h++)
		xx_[h + 1] = idx(xx[h], yy[h]);
	xx_[h_ + 1] = xx_[1] + z4;
	query1(xx_, h_ + 2, 0);
	xx_[0] = -1;
	for (h = 0; h < h_; h++)
		xx_[h + 1] = xx[h];
	xx_[h_ + 1] = INF;
	query1(xx_, h_ + 2, 1);
	xx_[0] = -1;
	for (h = 0; h < h_; h++)
		xx_[h + 1] = yy[h];
	xx_[h_ + 1] = INF;
	query1(xx_, h_ + 2, 2);
}

void solve_(int h_) {
	int h, i;
	long long xl_, yl_, xr_, yr_;

	if (h_ > 0 && idx(xx[h_ - 1], yy[h_ - 1]) == -1)
		return;
	xl1 = &xl_, xr1 = &xr_, yl1 = &yl_, yr1 = &yr_, get_bounds(h_);
	if (xl_ == INF) {
		for (h = h_; h < k; h++)
			xx[h] = 1, yy[h] = 1;
		for (h = 0; h < k; h++)
			printf("%lld %lld\n", xx[h], yy[h]);
		exit(0);
	} else if (h_ == 0) {
		xx[h_] = xl_;
		for (i = 0; i < n; i++)
			yy[h_] = yyl[i], solve_(h_ + 1);
	} else if (h_ < k) {
		xx[h_] = xl_, yy[h_] = yl_, solve_(h_ + 1);
		xx[h_] = xl_, yy[h_] = yr_, solve_(h_ + 1);
		xx[h_] = xr_, yy[h_] = yl_, solve_(h_ + 1);
		xx[h_] = xr_, yy[h_] = yr_, solve_(h_ + 1);
	}
}

int main() {
	int g, i, i_;
	long long l, r;

	scanf("%d%d", &n, &k);
	for (i = 0; i < n; i++)
		scanf("%lld%lld%lld%lld", &xxl[i], &yyl[i], &xxr[i], &yyr[i]);
	solve(0);
	xl = INF, xr = -1, yl = INF, yr = -1;
	for (i = 0; i < n; i++)
		xl = min(xl, xxr[i]), xr = max(xr, xxl[i]), yl = min(yl, yyr[i]), yr = max(yr, yyl[i]);
	assert(k == 4 && xl < xr && yl < yr);
	z1 = xr - xl, z2 = z1 + yr - yl, z3 = z2 + xr - xl, z4 = z3 + yr - yl;
	for (i = 0; i < n; i++)
		xxl[i] = max(xxl[i], xl), xxr[i] = min(xxr[i], xr), yyl[i] = max(yyl[i], yl), yyr[i] = min(yyr[i], yr);
	for (i = 0; i < n; i++)
		if (xl < xxl[i] && xxr[i] < xr && yyl[i] == yl && yyr[i] == yr)
			ll[i] = xxl[i], rr[i] = xxr[i], ii[1][nn[1]++] = i;
		else if (yl < yyl[i] && yyr[i] < yr && xxl[i] == xl && xxr[i] == xr)
			ll[i] = yyl[i], rr[i] = yyr[i], ii[2][nn[2]++] = i;
		else {
			l = INF, r = -1;
			if (yyl[i] == yl)
				l = min(l, xxl[i] - xl), r = max(r, xxr[i] - xl);
			if (xxr[i] == xr)
				l = min(l, z1 + yyl[i] - yl), r = max(r, z1 + yyr[i] - yl);
			if (xxl[i] == xl && yyl[i] == yl)
				l += z4, r += z4;
			if (yyr[i] == yr)
				l = min(l, z2 + xr - xxr[i]), r = max(r, z2 + xr - xxl[i]);
			if (xxl[i] == xl)
				l = min(l, z3 + yr - yyr[i]), r = max(r, z3 + yr - yyl[i]);
			if (l >= z4)
				l -= z4, r -= z4;
			ll[i] = l, rr[i] = r, ii[0][nn[0]++] = i;
		}
	xxl_[0] = INF, xxr_[0] = -1, yyl_[0] = INF, yyr_[0] = -1;
	for (g = 0; g < 3; g++) {
		zz = rr, sort(ii[g], 0, nn[g]);
		for (i = 0; i < nn[g]; i++) {
			i_ = ii[g][i];
			rr1[i_] = nn_[g];
			if (i + 1 == nn[g] || rr[ii[g][i + 1]] != rr[i_])
				rr2[g][nn_[g]++] = rr[i_];
		}
		zz = ll, sort(ii[g], 0, nn[g]);
		for (i = nn[g] - 1; i >= 0; i--) {
			i_ = ii[g][i];
			tt[g][i] = update(tt[g][i + 1], 0, nn_[g], rr1[i_], i_);
		}
	}
	solve_(0);
	return 0;
}

Compilation message

hamburg.c: In function 'main':
hamburg.c:214:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  214 |  scanf("%d%d", &n, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~
hamburg.c:216:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  216 |   scanf("%lld%lld%lld%lld", &xxl[i], &yyl[i], &xxr[i], &yyr[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 2 ms 340 KB Output is correct

Subtask #4
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 10 ms 340 KB Output is correct
14 Incorrect 90 ms 1364 KB Unexpected end of file - int32 expected
15 Halted 0 ms 0 KB -

Subtask #5
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 76 ms 6464 KB Output is correct
6 Correct 77 ms 6436 KB Output is correct
7 Correct 82 ms 6480 KB Output is correct
8 Correct 90 ms 6476 KB Output is correct

Subtask #6
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 79 ms 6460 KB Output is correct
6 Correct 95 ms 6444 KB Output is correct
7 Correct 82 ms 6512 KB Output is correct
8 Correct 91 ms 6516 KB Output is correct

Subtask #7
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 2 ms 340 KB Output is correct
13 Correct 85 ms 6452 KB Output is correct
14 Correct 81 ms 6452 KB Output is correct
15 Correct 81 ms 6476 KB Output is correct
16 Correct 80 ms 6500 KB Output is correct
17 Correct 105 ms 6492 KB Output is correct
18 Correct 81 ms 6468 KB Output is correct
19 Correct 81 ms 6524 KB Output is correct
20 Correct 97 ms 6416 KB Output is correct
21 Correct 247 ms 6532 KB Output is correct
22 Correct 164 ms 6424 KB Output is correct
23 Correct 138 ms 6492 KB Output is correct
24 Correct 151 ms 6444 KB Output is correct

Subtask #8
0 / 79.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 10 ms 340 KB Output is correct
14 Incorrect 90 ms 1364 KB Unexpected end of file - int32 expected
15 Halted 0 ms 0 KB -