oj.uz

Submission #1014944

# Submission time Handle Problem Language Result Execution time Memory
1014944 2024-07-05T18:51:13 Z rainboy Tiles (BOI24_tiles) C
46 / 100
 141 ms 15340 KB 
#include <stdio.h>
#include <string.h>
 
#define N	200000
#define N_	(1 << 18)	/* N_ = pow2(ceil(log2(N))) */
 
int max(int a, int b) { return a > b ? a : b; }
 
unsigned int Z = 12345;
 
int rand_() {
	return (Z *= 3) >> 1;
}
 
int xx[N], yy[N], n;
 
int compare_y(int i, int j) {
	return yy[i] - yy[j];
}
 
int compare_xy(int i, int j) {
	return xx[i] != xx[j] ? xx[i] - xx[j] : yy[i] - yy[j];
}
 
int (*compare)(int, int);
 
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) {
			int c = compare(ii[j], i_);
 
			if (c == 0)
				j++;
			else if (c < 0) {
				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;
	}
}
 
int yy1[N], n1;
 
int sz[N_ * 2];
int ss1[N_ * 2], ss2[N_ * 2];
int ccp[N_ * 2], ssp[N_ * 2];
int ccq[N_ * 2], ssq[N_ * 2];
char good[N_ * 2]; char lz[N_];
int h_, n_;
 
int flip(int c) {
	return c == 0 ? 0 : (c < 0 ? (c == -1 ? -2 : -1) : (c == 1 ? 2 : 1));
}
 
void put(int i, int x) {
	int tmp;
 
	if (x == -1) {
		tmp = ss1[i], ss1[i] = ss2[i], ss2[i] = tmp;
		ccp[i] = flip(ccp[i]), ccq[i] = flip(ccq[i]);
		if (i < n_)
			lz[i] = flip(lz[i]);
	} else if (x != -2) {
		if (x == 0)
			ss1[i] = ss2[i] = 0;
		else if (x == 1)
			ss1[i] = sz[i], ss2[i] = 0;
		else
			ss1[i] = 0, ss2[i] = sz[i];
		ccp[i] = ccq[i] = x, ssp[i] = ssq[i] = x == 0 ? 0 : sz[i];
		good[i] = 1;
		if (i < n_)
			lz[i] = x;
	}
}
 
void pus(int i) {
	if (lz[i] != -2)
		put(i << 1 | 0, lz[i]), put(i << 1 | 1, lz[i]), lz[i] = -2;
}
 
void pul(int i) {
	if (lz[i] == -2) {
		int l = i << 1, r = l | 1;
 
		ss1[i] = ss1[l] + ss1[r], ss2[i] = ss2[l] + ss2[r];
		ccp[i] = ccp[l];
		if (ccp[l] == 0)
			ssp[i] = 0;
		else
			ssp[i] = ssp[l] < sz[l] || ccp[r] != ccp[l] ? ssp[l] : sz[l] + ssp[r];
		ccq[i] = ccq[r];
		if (ccq[r] == 0)
			ssq[i] = 0;
		else
			ssq[i] = ssq[r] < sz[r] || ccq[l] != ccq[r] ? ssq[r] : ssq[l] + sz[r];
		good[i] = good[l] && good[r] && (ccq[l] != ccp[r] ? (ssq[l] == sz[l] || ssq[l] % 2 == 0) && (ssp[r] == sz[r] || ssp[r] % 2 == 0) : ssq[l] == sz[l] || ssp[r] == sz[r] || (ssq[l] + ssp[r]) % 2 == 0);
	}
}
 
void push(int i) {
	int h;
 
	for (h = h_; h > 0; h--)
		pus(i >> h);
}
 
void pull(int i) {
	while (i > 1)
		pul(i >>= 1);
}
 
void build() {
	int i;
 
	h_ = 0;
	while (1 << h_ < n1)
		h_++;
	n_ = 1 << h_;
	memset(lz, -2, n_ * sizeof *lz);
	memset(good, 1, n_ * 2 * sizeof *good);
	for (i = 0; i + 1 < n1; i++)
		sz[n_ + i] = yy1[i + 1] - yy1[i];
	for (i = n_ - 1; i > 0; i--)
		sz[i] = sz[i << 1 | 0] + sz[i << 1 | 1], pul(i);
}
 
void update(int l, int r, int x) {
	int l_ = l += n_, r_ = r += n_;
 
	push(l_), push(r_);
	for ( ; l <= r; l >>= 1, r >>= 1) {
		if ((l & 1) == 1)
			put(l++, x);
		if ((r & 1) == 0)
			put(r--, x);
	}
	pull(l_), pull(r_);
}
 
int query(int l, int r) {
	int s, s1, s2;
 
	push(l += n_), push(r += n_);
	s = 0, s1 = s2 = 0;
	for ( ; l <= r; l >>= 1, r >>= 1) {
		if ((l & 1) == 1)
			s += sz[l], s1 += ss1[l], s2 += ss2[l], l++;
		if ((r & 1) == 0)
			s += sz[r], s1 += ss1[r], s2 += ss2[r], r--;
	}
	return s1 == 0 && s2 == 0 ? 1 : (s1 == s ? 0 : -1);
}
 
int main() {
	static int ii[N], xx_[N], yy_[N];
	int i, j, x1, x2, y, y1, y2, ans, t;
 
	scanf("%d%*d", &n);
	for (i = 0; i < n; i++)
		scanf("%d%d", &xx[i], &yy[i]);
	n1 = 0;
	for (i = 0; i < n; i++)
		if ((xx[i] != xx[(i + 1) % n]) != (xx[i] != xx[(i - 1 + n) % n]))
			xx_[n1] = xx[i], yy_[n1] = yy[i], n1++;
	memcpy(xx, xx_, n1 * sizeof *xx_), memcpy(yy, yy_, n1 * sizeof *yy_), n = n1;
	for (i = 0; i < n; i++)
		ii[i] = i;
	compare = compare_y, sort(ii, 0, n);
	n1 = 0;
	for (i = 0; i < n; i = j) {
		j = i, y = yy[ii[i]];
		while (j < n && yy[ii[j]] == y)
			yy[ii[j++]] = n1;
		yy1[n1++] = y;
	}
	build();
	compare = compare_xy, sort(ii, 0, n);
	ans = 0;
	for (i = 0; i + 1 < n; i += 2) {
		y1 = yy[ii[i]], y2 = yy[ii[i + 1]];
		t = query(y1, y2 - 1);
		if (t == -1)
			break;
		update(y1, y2 - 1, t);
		if (i + 2 < n && xx[ii[i + 2]] != xx[ii[i + 1]]) {
			if (!good[1] || ssp[1] % 2 != 0 || ssq[1] % 2 != 0)
				break;
			x1 = xx[ii[i + 1]], x2 = xx[ii[i + 2]];
			if (ss2[1] == 0)
				ans = max(ans, x1 + (x2 - x1) / 2 * 2);
			if (ss1[1] == 0)
				ans = max(ans, x1 + 1 + (x2 - x1 - 1) / 2 * 2);
			if ((x2 - x1) % 2 != 0)
				put(1, -1);
		}
	}
	printf("%d\n", ans);
	return 0;
}

Compilation message

Main.c: In function 'main':
Main.c:166:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  166 |  scanf("%d%*d", &n);
      |  ^~~~~~~~~~~~~~~~~~
Main.c:168:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  168 |   scanf("%d%d", &xx[i], &yy[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 11 ms 2140 KB Output is correct
3 Correct 104 ms 10804 KB Output is correct
4 Correct 78 ms 5736 KB Output is correct
5 Correct 48 ms 5456 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 92 ms 10092 KB Output is correct
9 Correct 64 ms 6264 KB Output is correct
10 Correct 61 ms 9120 KB Output is correct
11 Correct 52 ms 5460 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 115 ms 11856 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 53 ms 4388 KB Output is correct
6 Correct 78 ms 4188 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 88 ms 4380 KB Output is correct
18 Correct 75 ms 4344 KB Output is correct
19 Incorrect 1 ms 344 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #5
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 64 ms 7764 KB Output is correct
3 Correct 50 ms 7508 KB Output is correct
4 Correct 55 ms 5716 KB Output is correct
5 Correct 79 ms 5808 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 68 ms 8016 KB Output is correct
9 Correct 70 ms 8272 KB Output is correct
10 Correct 102 ms 8272 KB Output is correct
11 Correct 103 ms 8276 KB Output is correct
12 Correct 123 ms 14932 KB Output is correct
13 Correct 126 ms 15292 KB Output is correct
14 Correct 81 ms 13396 KB Output is correct
15 Correct 78 ms 8016 KB Output is correct
16 Correct 141 ms 15184 KB Output is correct
17 Correct 112 ms 8528 KB Output is correct
18 Correct 140 ms 11604 KB Output is correct
19 Correct 101 ms 8476 KB Output is correct
20 Correct 106 ms 8272 KB Output is correct
21 Correct 88 ms 8028 KB Output is correct
22 Correct 97 ms 8436 KB Output is correct
23 Correct 112 ms 14672 KB Output is correct
24 Correct 126 ms 14676 KB Output is correct
25 Correct 109 ms 14672 KB Output is correct
26 Correct 129 ms 13648 KB Output is correct
27 Correct 114 ms 13652 KB Output is correct
28 Correct 114 ms 14420 KB Output is correct
29 Correct 85 ms 8020 KB Output is correct
30 Correct 117 ms 8272 KB Output is correct
31 Correct 77 ms 7920 KB Output is correct
32 Correct 106 ms 8484 KB Output is correct
33 Correct 63 ms 12876 KB Output is correct
34 Correct 62 ms 7184 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 428 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 428 KB Output is correct
49 Correct 128 ms 11600 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 103 ms 10064 KB Output is correct
53 Correct 86 ms 5932 KB Output is correct
54 Correct 83 ms 5944 KB Output is correct
55 Correct 79 ms 5724 KB Output is correct
56 Correct 77 ms 5724 KB Output is correct
57 Correct 1 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct

Subtask #6
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 14644 KB Output is correct
2 Correct 54 ms 7704 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 134 ms 15340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 11 ms 2140 KB Output is correct
34 Correct 104 ms 10804 KB Output is correct
35 Correct 78 ms 5736 KB Output is correct
36 Correct 48 ms 5456 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 92 ms 10092 KB Output is correct
40 Correct 64 ms 6264 KB Output is correct
41 Correct 61 ms 9120 KB Output is correct
42 Correct 52 ms 5460 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 115 ms 11856 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 1 ms 344 KB Output is correct
53 Correct 53 ms 4388 KB Output is correct
54 Correct 78 ms 4188 KB Output is correct
55 Correct 1 ms 344 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 1 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 0 ms 344 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 88 ms 4380 KB Output is correct
66 Correct 75 ms 4344 KB Output is correct
67 Incorrect 1 ms 344 KB Output isn't correct
68 Halted 0 ms 0 KB -