#include <stdio.h>
#define N 1000000
#define INF 0x3f3f3f3f
unsigned int X = 12345;
int rand_() {
return (X *= 3) >> 1;
}
void sort(int *xx, int l, int r) {
while (l < r) {
int i = l, j = l, k = r, x = xx[l + rand_() % (r - l)], tmp;
while (j < k)
if (xx[j] == x)
j++;
else if (xx[j] < x) {
tmp = xx[i], xx[i] = xx[j], xx[j] = tmp;
i++, j++;
} else {
k--;
tmp = xx[j], xx[j] = xx[k], xx[k] = tmp;
}
sort(xx, l, i);
l = k;
}
}
int solve(int *xx, int n, int a, int b, int d) {
static char dp[N + 1];
int i, i_, j;
dp[0] = 1;
for (i = 0, i_ = -1, j = 1; j <= n; j++) {
if (j >= a && dp[j - a])
i_ = j - a;
while (i < n && (j - i > b || xx[j - 1] - xx[i] > d))
i++;
dp[j] = i_ >= i;
}
return dp[n];
}
int main() {
static int xx[N];
int n, a, b, i, lower, upper, d;
scanf("%d%d%d", &n, &a, &b);
for (i = 0; i < n; i++)
scanf("%d", &xx[i]);
sort(xx, 0, n);
lower = -1, upper = INF;
while (upper - lower > 1) {
d = (lower + upper) / 2;
if (solve(xx, n, a, b, d))
upper = d;
else
lower = d;
}
printf("%d\n", upper);
return 0;
}
Compilation message
plaukimo_varzybos.c: In function 'main':
plaukimo_varzybos.c:50:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
50 | scanf("%d%d%d", &n, &a, &b);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
plaukimo_varzybos.c:52:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
52 | scanf("%d", &xx[i]);
| ^~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
18 ms |
1360 KB |
Output is correct |
3 |
Correct |
4 ms |
340 KB |
Output is correct |
4 |
Correct |
291 ms |
11820 KB |
Output is correct |
5 |
Correct |
307 ms |
11852 KB |
Output is correct |
6 |
Correct |
39 ms |
1340 KB |
Output is correct |
7 |
Correct |
282 ms |
10632 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
292 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
292 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
0 ms |
296 KB |
Output is correct |
13 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
18 ms |
1360 KB |
Output is correct |
3 |
Correct |
4 ms |
340 KB |
Output is correct |
4 |
Correct |
291 ms |
11820 KB |
Output is correct |
5 |
Correct |
307 ms |
11852 KB |
Output is correct |
6 |
Correct |
39 ms |
1340 KB |
Output is correct |
7 |
Correct |
282 ms |
10632 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
292 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
212 KB |
Output is correct |
14 |
Correct |
0 ms |
212 KB |
Output is correct |
15 |
Correct |
0 ms |
212 KB |
Output is correct |
16 |
Correct |
1 ms |
212 KB |
Output is correct |
17 |
Correct |
1 ms |
212 KB |
Output is correct |
18 |
Correct |
0 ms |
212 KB |
Output is correct |
19 |
Correct |
0 ms |
296 KB |
Output is correct |
20 |
Correct |
0 ms |
212 KB |
Output is correct |
21 |
Correct |
9 ms |
564 KB |
Output is correct |
22 |
Correct |
9 ms |
684 KB |
Output is correct |
23 |
Correct |
15 ms |
764 KB |
Output is correct |
24 |
Correct |
27 ms |
1208 KB |
Output is correct |
25 |
Correct |
112 ms |
5692 KB |
Output is correct |
26 |
Correct |
266 ms |
9548 KB |
Output is correct |
27 |
Correct |
34 ms |
1200 KB |
Output is correct |
28 |
Correct |
15 ms |
852 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
375 ms |
11808 KB |
Output is correct |
31 |
Correct |
412 ms |
11980 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
18 ms |
1360 KB |
Output is correct |
3 |
Correct |
4 ms |
340 KB |
Output is correct |
4 |
Correct |
291 ms |
11820 KB |
Output is correct |
5 |
Correct |
307 ms |
11852 KB |
Output is correct |
6 |
Correct |
39 ms |
1340 KB |
Output is correct |
7 |
Correct |
282 ms |
10632 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
292 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
9 ms |
564 KB |
Output is correct |
12 |
Correct |
9 ms |
684 KB |
Output is correct |
13 |
Correct |
15 ms |
764 KB |
Output is correct |
14 |
Correct |
27 ms |
1208 KB |
Output is correct |
15 |
Correct |
112 ms |
5692 KB |
Output is correct |
16 |
Correct |
266 ms |
9548 KB |
Output is correct |
17 |
Correct |
34 ms |
1200 KB |
Output is correct |
18 |
Correct |
15 ms |
852 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
375 ms |
11808 KB |
Output is correct |
21 |
Correct |
412 ms |
11980 KB |
Output is correct |
22 |
Correct |
0 ms |
212 KB |
Output is correct |
23 |
Correct |
1 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
212 KB |
Output is correct |
25 |
Correct |
0 ms |
212 KB |
Output is correct |
26 |
Correct |
0 ms |
212 KB |
Output is correct |
27 |
Correct |
1 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
0 ms |
296 KB |
Output is correct |
31 |
Correct |
0 ms |
212 KB |
Output is correct |
32 |
Correct |
11 ms |
724 KB |
Output is correct |
33 |
Correct |
159 ms |
6256 KB |
Output is correct |
34 |
Correct |
150 ms |
5996 KB |
Output is correct |
35 |
Correct |
453 ms |
11892 KB |
Output is correct |
36 |
Correct |
430 ms |
11880 KB |
Output is correct |
37 |
Correct |
412 ms |
11820 KB |
Output is correct |
38 |
Correct |
175 ms |
7272 KB |
Output is correct |