| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 545904 |
2022-04-05T16:05:46 Z |
rainboy |
Match (CEOI16_match) |
C |
|
8 ms |
468 KB |
/* upsolve after reading analysis */
#include <stdio.h>
#include <string.h>
#define N 1234567
int sum(int n, int a, int b) {
int m = n * 2 + 1, d = (b - a + m) % m;
if (n % 2 == 0 && d % 2 == 0 && d < m - 1)
return (a + d / 2) % m;
if (n % 2 == 1 && (m - d) % 2 == 0 && d > 1)
return (b + (m - d) / 2) % m;
if (d == 1 || d == m - 1)
return a;
if (d == (n + 3) % m || d == (n - 1 + m) % m)
return (a - n + m) % m;
if (d == (n - 3 + m) % m || d == (n + 5) % m)
return (b - n - 1 + m) % m;
return -1;
}
int main() {
int t, r;
scanf("%d%d", &t, &r);
if (r != 3)
while (t--) {
static int aa[N];
static char used[N * 2 + 1];
int n, m, i, s, a, b;
scanf("%d", &n), m = n * 2 + 1;
s = 0;
for (i = 0; i < n; i++) {
scanf("%d", &aa[i]);
s = (s + aa[i]) % m;
}
memset(used, 0, m * sizeof *used);
for (i = 0; i < n; i++)
used[aa[i] = (aa[i] - s + m) % m] = 1;
a = -1, b = -1;
for (i = 1; i < n; i++)
if (used[i] && used[m - i]) {
if (n % 2 == 0)
a = (m - i + s) % m, b = (i + s) % m;
else
a = (i + s) % m, b = (m - i + s) % m;
break;
}
if (a == -1 && b == -1) {
if (used[0] && used[1])
a = (0 + s) % m, b = (1 + s) % m;
else if (used[0] && used[m - 1])
a = (0 + s) % m, b = (m - 1 + s) % m;
else if (used[n] && used[2])
a = (n + s) % m, b = (2 + s) % m;
else if (used[n] && used[m - 2])
a = (n + s) % m, b = (m - 2 + s) % m;
else if (used[4] && used[n + 1])
a = (4 + s) % m, b = (n + 1 + s) % m;
else if (used[m - 4] && used[n + 1])
a = (m - 4 + s) % m, b = (n + 1 + s) % m;
}
printf("%d %d\n", a, b);
}
else
while (t--) {
int n, m, a, b, c, d;
scanf("%d%d%d%d%d", &n, &a, &b, &c, &d), m = n * 2 + 1;
printf("%d\n", (m * 2 - sum(n, a, b) - sum(n, c, d)) % m);
}
return 0;
}
Compilation message
match.c: In function 'main':
match.c:26:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
26 | scanf("%d%d", &t, &r);
| ^~~~~~~~~~~~~~~~~~~~~
match.c:33:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | scanf("%d", &n), m = n * 2 + 1;
| ^~~~~~~~~~~~~~~
match.c:36:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
36 | scanf("%d", &aa[i]);
| ^~~~~~~~~~~~~~~~~~~
match.c:71:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
71 | scanf("%d%d%d%d%d", &n, &a, &b, &c, &d), m = n * 2 + 1;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
468 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
468 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
468 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
