oj.uz

Submission #382611

# Submission time Handle Problem Language Result Execution time Memory
382611 2021-03-27T21:46:46 Z rainboy Strange Device (APIO19_strange_device) C
100 / 100
 1869 ms 106728 KB 
#include <stdio.h>

#define N	1000000

unsigned int X = 12345;

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

long long gcd(long long a, long long b) {
	return b == 0 ? a : gcd(b, a % b);
}

long long xx[N * 2], yy[N * 4], ll_[N * 2], rr_[N * 2];

int compare_x(int i, int j) {
	return xx[i] == xx[j] ? 0 : (xx[i] < xx[j] ? -1 : 1);
}

int compare_y(int i, int j) {
	return yy[i] == yy[j] ? 0 : (yy[i] < yy[j] ? -1 : 1);
}

int compare_l(int i, int j) {
	return ll_[i] == ll_[j] ? 0 : (ll_[i] < ll_[j] ? -1 : 1);
}

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 main() {
	static long long ll[N], rr[N];
	static int ii_[N * 4], ii1[N * 2], kk[N * 2];
	int n, n_, n1, i, j, x, cnt;
	long long a, b, l, r, ans;

	scanf("%d%lld%lld", &n, &a, &b), a /= gcd(a, b + 1);
	for (i = 0; i < n; i++)
		scanf("%lld%lld", &ll[i], &rr[i]);
	n_ = 0, n1 = 0;
	for (i = 0; i < n; i++) {
		l = ll[i] / b, r = rr[i] / b;
		if (l == r)
			xx[n_] = l % a, yy[n_ << 1 | 0] = ll[i] % b, yy[n_ << 1 | 1] = rr[i] % b + 1, n_++;
		else {
			xx[n_] = l % a, yy[n_ << 1 | 0] = ll[i] % b, yy[n_ << 1 | 1] = b, n_++;
			xx[n_] = r % a, yy[n_ << 1 | 0] = 0, yy[n_ << 1 | 1] = rr[i] % b + 1, n_++;
			if (r - l > 1) {
				l++, r--;
				if (r - l + 1 >= a) {
					printf("%lld\n", a * b);
					return 0;
				}
				l %= a, r %= a;
				if (l <= r)
					ll_[n1] = l, rr_[n1] = r, n1++;
				else {
					ll_[n1] = l, rr_[n1] = a - 1, n1++;
					ll_[n1] = 0, rr_[n1] = r, n1++;
				}
			}
		}
	}
	for (i = 0; i < n_; i++)
		ii_[i] = i;
	compare = compare_x, sort(ii_, 0, n_);
	for (i = 0; i < n1; i++)
		ii1[i] = i;
	compare = compare_l, sort(ii1, 0, n1);
	ans = 0;
	for (i = 0, j = 0, r = -1, x = 0; i <= n_; i++) {
		while (j < n1 && (i == n_ || ll_[ii1[j]] <= xx[ii_[i]])) {
			int i1 = ii1[j++];

			if (r < ll_[i1])
				ans += rr_[i1] - ll_[i1] + 1, r = rr_[i1];
			else if (r < rr_[i1])
				ans += rr_[i1] - r, r = rr_[i1];
		}
		if (i < n_)
			xx[ii_[i]] = r >= xx[ii_[i]] ? -1 : (i + 1 == n_ || xx[ii_[i + 1]] != xx[ii_[i]] ? x++ : x);
	}
	ans *= b;
	for (i = 0; i < n_ * 2; i++)
		ii_[i] = i;
	compare = compare_y, sort(ii_, 0, n_ * 2);
	cnt = 0;
	for (i = 0; i + 1 < n_ * 2; i++) {
		int i_ = ii_[i];

		x = xx[i_ >> 1];
		if ((i_ & 1) == 0) {
			if (x != -1 && kk[x]++ == 0)
				cnt++;
		} else {
			if (x != -1 && --kk[x] == 0)
				cnt--;
		}
		ans += (yy[ii_[i + 1]] - yy[ii_[i]]) * cnt;
	}
	printf("%lld\n", ans);
	return 0;
}

Compilation message

strange_device.c: In function 'main':
strange_device.c:59:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   59 |  scanf("%d%lld%lld", &n, &a, &b), a /= gcd(a, b + 1);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.c:61:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   61 |   scanf("%lld%lld", &ll[i], &rr[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 8 ms 1132 KB Output is correct
3 Correct 8 ms 1408 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 2 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 8 ms 1260 KB Output is correct
17 Correct 68 ms 8044 KB Output is correct
18 Correct 2 ms 492 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 2 ms 492 KB Output is correct
5 Correct 460 ms 99820 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 626 ms 53476 KB Output is correct
3 Correct 1014 ms 106024 KB Output is correct
4 Correct 987 ms 106392 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 626 ms 53476 KB Output is correct
3 Correct 1014 ms 106024 KB Output is correct
4 Correct 987 ms 106392 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 986 ms 102396 KB Output is correct
7 Correct 590 ms 48876 KB Output is correct
8 Correct 1036 ms 106728 KB Output is correct
9 Correct 968 ms 105836 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 626 ms 53476 KB Output is correct
3 Correct 1014 ms 106024 KB Output is correct
4 Correct 987 ms 106392 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 80 ms 11628 KB Output is correct
7 Correct 98 ms 13676 KB Output is correct
8 Correct 96 ms 12780 KB Output is correct
9 Correct 93 ms 12780 KB Output is correct
10 Correct 86 ms 10732 KB Output is correct
11 Correct 98 ms 12780 KB Output is correct
12 Correct 97 ms 13164 KB Output is correct
13 Correct 96 ms 12780 KB Output is correct
14 Correct 75 ms 8556 KB Output is correct
15 Correct 107 ms 12396 KB Output is correct
16 Correct 90 ms 7404 KB Output is correct
17 Correct 139 ms 14316 KB Output is correct
18 Correct 1397 ms 106468 KB Output is correct
19 Correct 1456 ms 105980 KB Output is correct
20 Correct 1468 ms 106148 KB Output is correct
21 Correct 109 ms 14316 KB Output is correct
22 Correct 106 ms 14316 KB Output is correct
23 Correct 194 ms 37228 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 80 ms 6124 KB Output is correct
3 Correct 92 ms 8172 KB Output is correct
4 Correct 1524 ms 64836 KB Output is correct
5 Correct 97 ms 7788 KB Output is correct
6 Correct 111 ms 7788 KB Output is correct
7 Correct 95 ms 8428 KB Output is correct
8 Correct 103 ms 8300 KB Output is correct
9 Correct 101 ms 8428 KB Output is correct
10 Correct 89 ms 8428 KB Output is correct
11 Correct 79 ms 8172 KB Output is correct
12 Correct 86 ms 7680 KB Output is correct
13 Correct 99 ms 7916 KB Output is correct
14 Correct 921 ms 50796 KB Output is correct
15 Correct 75 ms 7532 KB Output is correct
16 Correct 857 ms 51052 KB Output is correct
17 Correct 1136 ms 64256 KB Output is correct
18 Correct 1 ms 364 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 8 ms 1132 KB Output is correct
3 Correct 8 ms 1408 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 2 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 8 ms 1260 KB Output is correct
17 Correct 68 ms 8044 KB Output is correct
18 Correct 2 ms 492 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 2 ms 512 KB Output is correct
26 Correct 2 ms 492 KB Output is correct
27 Correct 2 ms 492 KB Output is correct
28 Correct 460 ms 99820 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 626 ms 53476 KB Output is correct
31 Correct 1014 ms 106024 KB Output is correct
32 Correct 987 ms 106392 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 986 ms 102396 KB Output is correct
35 Correct 590 ms 48876 KB Output is correct
36 Correct 1036 ms 106728 KB Output is correct
37 Correct 968 ms 105836 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 80 ms 11628 KB Output is correct
40 Correct 98 ms 13676 KB Output is correct
41 Correct 96 ms 12780 KB Output is correct
42 Correct 93 ms 12780 KB Output is correct
43 Correct 86 ms 10732 KB Output is correct
44 Correct 98 ms 12780 KB Output is correct
45 Correct 97 ms 13164 KB Output is correct
46 Correct 96 ms 12780 KB Output is correct
47 Correct 75 ms 8556 KB Output is correct
48 Correct 107 ms 12396 KB Output is correct
49 Correct 90 ms 7404 KB Output is correct
50 Correct 139 ms 14316 KB Output is correct
51 Correct 1397 ms 106468 KB Output is correct
52 Correct 1456 ms 105980 KB Output is correct
53 Correct 1468 ms 106148 KB Output is correct
54 Correct 109 ms 14316 KB Output is correct
55 Correct 106 ms 14316 KB Output is correct
56 Correct 194 ms 37228 KB Output is correct
57 Correct 1 ms 364 KB Output is correct
58 Correct 80 ms 6124 KB Output is correct
59 Correct 92 ms 8172 KB Output is correct
60 Correct 1524 ms 64836 KB Output is correct
61 Correct 97 ms 7788 KB Output is correct
62 Correct 111 ms 7788 KB Output is correct
63 Correct 95 ms 8428 KB Output is correct
64 Correct 103 ms 8300 KB Output is correct
65 Correct 101 ms 8428 KB Output is correct
66 Correct 89 ms 8428 KB Output is correct
67 Correct 79 ms 8172 KB Output is correct
68 Correct 86 ms 7680 KB Output is correct
69 Correct 99 ms 7916 KB Output is correct
70 Correct 921 ms 50796 KB Output is correct
71 Correct 75 ms 7532 KB Output is correct
72 Correct 857 ms 51052 KB Output is correct
73 Correct 1136 ms 64256 KB Output is correct
74 Correct 1 ms 364 KB Output is correct
75 Correct 1 ms 364 KB Output is correct
76 Correct 1 ms 364 KB Output is correct
77 Correct 1 ms 364 KB Output is correct
78 Correct 1 ms 364 KB Output is correct
79 Correct 10 ms 1388 KB Output is correct
80 Correct 1109 ms 52108 KB Output is correct
81 Correct 1567 ms 64492 KB Output is correct
82 Correct 1697 ms 103276 KB Output is correct
83 Correct 1869 ms 103232 KB Output is correct
84 Correct 1849 ms 102124 KB Output is correct
85 Correct 1795 ms 105068 KB Output is correct
86 Correct 194 ms 38252 KB Output is correct
87 Correct 1 ms 364 KB Output is correct