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Submission #382585

# Submission time Handle Problem Language Result Execution time Memory
382585 2021-03-27T19:33:21 Z rainboy Strange Device (APIO19_strange_device) C
15 / 100
 546 ms 40044 KB 
#include <stdio.h>

#define N	1000000

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

unsigned int X = 12345;

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

long long xx[N], yy[N];

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) {
			long long c = xx[ii[j]] != xx[i_] ? xx[ii[j]] - xx[i_] : yy[ii[j]] - yy[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 int ii[N];
	int n, n_, i, ans;
	long long a, b;

	scanf("%d%lld%lld", &n, &a, &b);
	if (n == 1) {
		long long l, r, k;

		scanf("%lld%lld", &l, &r);
		k = a / gcd(a, b + 1);
		printf("%lld\n", k <= (r - l + 1) / b ? k * b : r - l + 1);
		return 0;
	}
	n_ = 0;
	while (n--) {
		long long l, r;

		scanf("%lld%lld", &l, &r);
		while (l <= r) {
			xx[n_] = (l + l / b) % a, yy[n_] = l % b, n_++;
			l++;
		}
	}
	n = n_;
	for (i = 0; i < n; i++)
		ii[i] = i;
	sort(ii, 0, n);
	ans = 1;
	for (i = 1; i < n; i++)
		if (xx[ii[i]] != xx[ii[i - 1]] || yy[ii[i]] != yy[ii[i - 1]])
			ans++;
	printf("%d\n", ans);
	return 0;
}

Compilation message

strange_device.c: In function 'main':
strange_device.c:44:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   44 |  scanf("%d%lld%lld", &n, &a, &b);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.c:48:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   48 |   scanf("%lld%lld", &l, &r);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.c:57:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   57 |   scanf("%lld%lld", &l, &r);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 48 ms 4076 KB Output is correct
3 Correct 73 ms 5952 KB Output is correct
4 Correct 3 ms 492 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 11 ms 1536 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 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 69 ms 6252 KB Output is correct
16 Correct 27 ms 2412 KB Output is correct
17 Correct 59 ms 2284 KB Output is correct
18 Correct 1 ms 364 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
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 129 ms 13036 KB Output is correct
3 Correct 185 ms 12780 KB Output is correct
4 Correct 163 ms 12524 KB Output is correct
5 Runtime error 42 ms 32364 KB Execution killed with signal 11

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Runtime error 546 ms 40044 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Runtime error 546 ms 40044 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Runtime error 546 ms 40044 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Runtime error 57 ms 32108 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 48 ms 4076 KB Output is correct
3 Correct 73 ms 5952 KB Output is correct
4 Correct 3 ms 492 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 11 ms 1536 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 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 69 ms 6252 KB Output is correct
16 Correct 27 ms 2412 KB Output is correct
17 Correct 59 ms 2284 KB Output is correct
18 Correct 1 ms 364 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 129 ms 13036 KB Output is correct
26 Correct 185 ms 12780 KB Output is correct
27 Correct 163 ms 12524 KB Output is correct
28 Runtime error 42 ms 32364 KB Execution killed with signal 11