oj.uz

Submission #671288

# Submission time Handle Problem Language Result Execution time Memory
671288 2022-12-12T18:38:07 Z rainboy Hamburg Steak (JOI20_hamburg) C
15 / 100
 245 ms 6776 KB 
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>

#define N	200000
#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; }

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

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]; int ii0[N], ii1[N], ii2[N], n0, n1, n2; long long xl, xr, yl, yr, z1, z2, z3, z4;

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

long long xl_, yl_, xr_, yr_;

void get_min_max(int h_) {
	int h, i, i_, pierced;

	xl_ = INF, xr_ = -1, yl_ = INF, yr_ = -1;
	for (i = 0; i < n0; i++) {
		i_ = ii0[i], pierced = 0;
		for (h = 0; h < h_; h++) {
			long long z = idx(xx[h], yy[h]);

			if (ll[i_] <= z && z <= rr[i_] || ll[i_] <= z4 + z && rr[i_] <= z4 + z) {
				pierced = 1;
				break;
			}
		}
		if (!pierced)
			xl_ = min(xl_, xxr[i]), xr_ = max(xr_, xxl[i]), yl_ = min(yl_, yyr[i]), yr_ = max(yr_, yyl[i]);
	}
	for (i = 0; i < n1; i++) {
		i_ = ii1[i], pierced = 0;
		for (h = 0; h < h_; h++)
			if (ll[i_] <= xx[h] && xx[h] <= rr[i_]) {
				pierced = 1;
				break;
			}
		if (!pierced)
			xl_ = min(xl_, xxr[i]), xr_ = max(xr_, xxl[i]), yl_ = min(yl_, yyr[i]), yr_ = max(yr_, yyl[i]);
	}
	for (i = 0; i < n2; i++) {
		i_ = ii2[i], pierced = 0;
		for (h = 0; h < h_; h++)
			if (ll[i_] <= yy[h] && yy[h] <= rr[i_]) {
				pierced = 1;
				break;
			}
		if (!pierced)
			xl_ = min(xl_, xxr[i]), xr_ = max(xr_, xxl[i]), yl_ = min(yl_, yyr[i]), yr_ = max(yr_, yyl[i]);
	}
}

void solve_(int h_) {
	int h, i;

	if (h_ == 0 || idx(xx[h_ - 1], yy[h_ - 1]) == -1)
		return;
	get_min_max(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 {
			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 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], ii1[n1++] = i;
		else if (yl < yyl[i] && yyr[i] < yr && xxl[i] == xl && xxr[i] == xr)
			ll[i] = yyl[i], rr[i] = yyr[i], ii2[n2++] = i;
		else {
			l = INF, r = -1;
			if (yyl[i] == yl) {
				l = min(l, xxl[i] - xl), r = max(r, xxr[i] - xl);
				if (xxl[i] == xl)
					l += z4, r += z4;
			}
			if (xxr[i] == xr)
				l = min(l, z1 + yyl[i] - yl), r = max(r, z1 + yyr[i] - yl);
			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]);
			ll[i] = l, rr[i] = r, ii0[n0++] = i;
		}
	solve_(0);
	return 0;
}

Compilation message

hamburg.c: In function 'get_min_max':
hamburg.c:70:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   70 |    if (ll[i_] <= z && z <= rr[i_] || ll[i_] <= z4 + z && rr[i_] <= z4 + z) {
      |        ~~~~~~~~~~~~^~~~~~~~~~~~~~
hamburg.c: In function 'main':
hamburg.c:130:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  130 |  scanf("%d%d", &n, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~
hamburg.c:132:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  132 |   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 2 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 344 KB Output is correct
13 Correct 10 ms 320 KB Output is correct
14 Incorrect 10 ms 380 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 79 ms 6444 KB Output is correct
6 Correct 76 ms 6504 KB Output is correct
7 Correct 77 ms 6500 KB Output is correct
8 Correct 77 ms 6488 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 6476 KB Output is correct
6 Correct 88 ms 6532 KB Output is correct
7 Correct 81 ms 6472 KB Output is correct
8 Correct 89 ms 6476 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 83 ms 6776 KB Output is correct
14 Correct 82 ms 6420 KB Output is correct
15 Correct 80 ms 6452 KB Output is correct
16 Correct 83 ms 6476 KB Output is correct
17 Correct 83 ms 6452 KB Output is correct
18 Correct 79 ms 6512 KB Output is correct
19 Correct 87 ms 6608 KB Output is correct
20 Correct 95 ms 6448 KB Output is correct
21 Correct 245 ms 6532 KB Output is correct
22 Correct 168 ms 6424 KB Output is correct
23 Correct 133 ms 6532 KB Output is correct
24 Correct 149 ms 6536 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 2 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 344 KB Output is correct
13 Correct 10 ms 320 KB Output is correct
14 Incorrect 10 ms 380 KB Unexpected end of file - int32 expected
15 Halted 0 ms 0 KB -