#include <stdio.h>
#include <string.h>
#define N 200000
int main() {
static int aa[N * 2], bb[N * 2], pp[N * 2];
static char used[N];
int n, r, p, p_, i, i_, a;
scanf("%d%d", &n, &r);
if (n > 200) {
printf(":(\n");
return 0;
}
for (i = 0; i < n * 2; i++)
scanf("%d", &aa[i]), aa[i]--;
i_ = -1, p_ = n * 2;
for (i = 0; i < n * 2; i++) {
int tmp;
if (i > 0)
tmp = aa[i], aa[i] = aa[i - 1], aa[i - 1] = tmp;
memcpy(bb, aa, n * 2 * sizeof *aa);
for (p = 0; p < n * 2; p++)
pp[aa[p]] = p / 2;
if (aa[i] == 0)
p = 0;
else if (aa[i] >= n + 1) {
memset(used, 0, n * sizeof *used), used[0] = 1;
for (a = n * 2 - 1; a >= aa[i]; a--) {
p = pp[a];
while (used[p])
p = (p - 1 + n) % n;
used[p] = 1;
}
} else {
memset(used, 0, n * sizeof *used);
for (a = 1; a <= aa[i]; a++) {
p = pp[a];
while (used[p])
p = (p + 1) % n;
used[p] = 1;
}
p = (p - r % n + n) % n;
}
if (p_ >= p)
p_ = p, i_ = i / 2;
}
printf("%d\n", i_ + 1);
return 0;
}
Compilation message
archery.c: In function 'main':
archery.c:11:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
11 | scanf("%d%d", &n, &r);
| ^~~~~~~~~~~~~~~~~~~~~
archery.c:17:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
17 | scanf("%d", &aa[i]), aa[i]--;
| ^~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 3 |
Correct |
2 ms |
332 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 4 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 5 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 6 |
Correct |
7 ms |
204 KB |
Output is correct |
| 7 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 8 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 9 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 10 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 11 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 12 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 13 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 14 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 15 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 16 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 17 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 18 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 19 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 20 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 21 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 22 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 23 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 24 |
Correct |
7 ms |
308 KB |
Output is correct |
| 25 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 26 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 27 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 28 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 29 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 30 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 31 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 32 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 33 |
Correct |
5 ms |
204 KB |
Output is correct |
| 34 |
Correct |
1 ms |
204 KB |
Output is correct |
| 35 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 36 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 37 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 38 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 39 |
Correct |
8 ms |
300 KB |
Output is correct |
| 40 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 41 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 42 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 43 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 44 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 45 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 46 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 47 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
