| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 503334 |
2022-01-07T16:35:39 Z |
rainboy |
Kućice (COCI21_kucice) |
C |
|
157 ms |
300 KB |
#include <stdio.h>
#define N 1000
#define MD 1000000007
unsigned int X = 12345;
int rand_() {
return (X *= 3) >> 1;
}
int pp2[N + 1];
void init() {
int i;
pp2[0] = 1;
for (i = 1; i <= N; i++)
pp2[i] = pp2[i - 1] * 2 % MD;
}
int xx[N], yy[N];
long long cross(int i, int j, int k) {
return (long long) (xx[j] - xx[i]) * (yy[k] - yy[i]) - (long long) (xx[k] - xx[i]) * (yy[j] - yy[i]);
}
int o;
int compare(int i, int j) {
int sgni = xx[i] < xx[o] || xx[i] == xx[o] && yy[i] < yy[o] ? -1 : 1;
int sgnj = xx[j] < xx[o] || xx[j] == xx[o] && yy[j] < yy[o] ? -1 : 1;
long long c;
if (sgni != sgnj)
return sgni - sgnj;
c = cross(o, i, j);
return c == 0 ? 0 : (c < 0 ? -1 : 1);
}
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 int ii[N];
int n, i, j, k, ans;
init();
scanf("%d", &n);
for (i = 0; i < n; i++)
scanf("%d%d", &xx[i], &yy[i]);
ans = (long long) (pp2[n] - 1) * n % MD;
if (n > 1)
for (i = 0; i < n; i++) {
for (j = 0; j < n; j++)
if (j != i)
ii[j < i ? j : j - 1] = j;
o = i, sort(ii, 0, n - 1);
for (j = 0, k = 0; j < n - 1; j++) {
while (k < n - 1 + j && cross(i, ii[j], ii[k % (n - 1)]) <= 0)
k++;
ans = (ans - pp2[k - 1 - j] + MD) % MD;
}
}
printf("%d\n", ans);
return 0;
}
Compilation message
Main.c: In function 'compare':
Main.c:31:45: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
31 | int sgni = xx[i] < xx[o] || xx[i] == xx[o] && yy[i] < yy[o] ? -1 : 1;
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
Main.c:32:45: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
32 | int sgnj = xx[j] < xx[o] || xx[j] == xx[o] && yy[j] < yy[o] ? -1 : 1;
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
Main.c: In function 'main':
Main.c:68:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
68 | scanf("%d", &n);
| ^~~~~~~~~~~~~~~
Main.c:70:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
70 | scanf("%d%d", &xx[i], &yy[i]);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Correct |
0 ms |
204 KB |
Output is correct |
| 6 |
Correct |
125 ms |
204 KB |
Output is correct |
| 7 |
Correct |
138 ms |
268 KB |
Output is correct |
| 8 |
Correct |
121 ms |
292 KB |
Output is correct |
| 9 |
Correct |
140 ms |
204 KB |
Output is correct |
| 10 |
Correct |
114 ms |
264 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Correct |
0 ms |
204 KB |
Output is correct |
| 6 |
Correct |
139 ms |
204 KB |
Output is correct |
| 7 |
Correct |
140 ms |
300 KB |
Output is correct |
| 8 |
Correct |
117 ms |
272 KB |
Output is correct |
| 9 |
Correct |
143 ms |
276 KB |
Output is correct |
| 10 |
Correct |
114 ms |
280 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Correct |
0 ms |
204 KB |
Output is correct |
| 6 |
Correct |
0 ms |
204 KB |
Output is correct |
| 7 |
Correct |
0 ms |
204 KB |
Output is correct |
| 8 |
Correct |
0 ms |
204 KB |
Output is correct |
| 9 |
Correct |
0 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
248 KB |
Output is correct |
| 11 |
Correct |
0 ms |
204 KB |
Output is correct |
| 12 |
Correct |
0 ms |
204 KB |
Output is correct |
| 13 |
Correct |
1 ms |
204 KB |
Output is correct |
| 14 |
Correct |
0 ms |
204 KB |
Output is correct |
| 15 |
Correct |
0 ms |
204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Correct |
0 ms |
204 KB |
Output is correct |
| 6 |
Correct |
0 ms |
204 KB |
Output is correct |
| 7 |
Correct |
0 ms |
204 KB |
Output is correct |
| 8 |
Correct |
0 ms |
204 KB |
Output is correct |
| 9 |
Correct |
0 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
248 KB |
Output is correct |
| 11 |
Correct |
0 ms |
204 KB |
Output is correct |
| 12 |
Correct |
0 ms |
204 KB |
Output is correct |
| 13 |
Correct |
1 ms |
204 KB |
Output is correct |
| 14 |
Correct |
0 ms |
204 KB |
Output is correct |
| 15 |
Correct |
0 ms |
204 KB |
Output is correct |
| 16 |
Correct |
0 ms |
204 KB |
Output is correct |
| 17 |
Correct |
0 ms |
204 KB |
Output is correct |
| 18 |
Correct |
0 ms |
204 KB |
Output is correct |
| 19 |
Correct |
0 ms |
204 KB |
Output is correct |
| 20 |
Correct |
0 ms |
204 KB |
Output is correct |
| 21 |
Correct |
0 ms |
204 KB |
Output is correct |
| 22 |
Correct |
2 ms |
204 KB |
Output is correct |
| 23 |
Correct |
1 ms |
204 KB |
Output is correct |
| 24 |
Correct |
2 ms |
204 KB |
Output is correct |
| 25 |
Correct |
2 ms |
204 KB |
Output is correct |
| 26 |
Correct |
2 ms |
284 KB |
Output is correct |
| 27 |
Correct |
1 ms |
204 KB |
Output is correct |
| 28 |
Correct |
2 ms |
204 KB |
Output is correct |
| 29 |
Correct |
2 ms |
204 KB |
Output is correct |
| 30 |
Correct |
2 ms |
204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Correct |
0 ms |
204 KB |
Output is correct |
| 6 |
Correct |
125 ms |
204 KB |
Output is correct |
| 7 |
Correct |
138 ms |
268 KB |
Output is correct |
| 8 |
Correct |
121 ms |
292 KB |
Output is correct |
| 9 |
Correct |
140 ms |
204 KB |
Output is correct |
| 10 |
Correct |
114 ms |
264 KB |
Output is correct |
| 11 |
Correct |
0 ms |
204 KB |
Output is correct |
| 12 |
Correct |
0 ms |
204 KB |
Output is correct |
| 13 |
Correct |
0 ms |
204 KB |
Output is correct |
| 14 |
Correct |
0 ms |
204 KB |
Output is correct |
| 15 |
Correct |
0 ms |
204 KB |
Output is correct |
| 16 |
Correct |
139 ms |
204 KB |
Output is correct |
| 17 |
Correct |
140 ms |
300 KB |
Output is correct |
| 18 |
Correct |
117 ms |
272 KB |
Output is correct |
| 19 |
Correct |
143 ms |
276 KB |
Output is correct |
| 20 |
Correct |
114 ms |
280 KB |
Output is correct |
| 21 |
Correct |
0 ms |
208 KB |
Output is correct |
| 22 |
Correct |
0 ms |
204 KB |
Output is correct |
| 23 |
Correct |
0 ms |
204 KB |
Output is correct |
| 24 |
Correct |
0 ms |
204 KB |
Output is correct |
| 25 |
Correct |
0 ms |
204 KB |
Output is correct |
| 26 |
Correct |
0 ms |
204 KB |
Output is correct |
| 27 |
Correct |
0 ms |
204 KB |
Output is correct |
| 28 |
Correct |
0 ms |
204 KB |
Output is correct |
| 29 |
Correct |
0 ms |
204 KB |
Output is correct |
| 30 |
Correct |
1 ms |
248 KB |
Output is correct |
| 31 |
Correct |
0 ms |
204 KB |
Output is correct |
| 32 |
Correct |
0 ms |
204 KB |
Output is correct |
| 33 |
Correct |
1 ms |
204 KB |
Output is correct |
| 34 |
Correct |
0 ms |
204 KB |
Output is correct |
| 35 |
Correct |
0 ms |
204 KB |
Output is correct |
| 36 |
Correct |
0 ms |
204 KB |
Output is correct |
| 37 |
Correct |
0 ms |
204 KB |
Output is correct |
| 38 |
Correct |
0 ms |
204 KB |
Output is correct |
| 39 |
Correct |
0 ms |
204 KB |
Output is correct |
| 40 |
Correct |
0 ms |
204 KB |
Output is correct |
| 41 |
Correct |
0 ms |
204 KB |
Output is correct |
| 42 |
Correct |
2 ms |
204 KB |
Output is correct |
| 43 |
Correct |
1 ms |
204 KB |
Output is correct |
| 44 |
Correct |
2 ms |
204 KB |
Output is correct |
| 45 |
Correct |
2 ms |
204 KB |
Output is correct |
| 46 |
Correct |
2 ms |
284 KB |
Output is correct |
| 47 |
Correct |
1 ms |
204 KB |
Output is correct |
| 48 |
Correct |
2 ms |
204 KB |
Output is correct |
| 49 |
Correct |
2 ms |
204 KB |
Output is correct |
| 50 |
Correct |
2 ms |
204 KB |
Output is correct |
| 51 |
Correct |
0 ms |
204 KB |
Output is correct |
| 52 |
Correct |
0 ms |
204 KB |
Output is correct |
| 53 |
Correct |
0 ms |
204 KB |
Output is correct |
| 54 |
Correct |
0 ms |
204 KB |
Output is correct |
| 55 |
Correct |
0 ms |
204 KB |
Output is correct |
| 56 |
Correct |
0 ms |
204 KB |
Output is correct |
| 57 |
Correct |
138 ms |
272 KB |
Output is correct |
| 58 |
Correct |
122 ms |
204 KB |
Output is correct |
| 59 |
Correct |
157 ms |
204 KB |
Output is correct |
| 60 |
Correct |
117 ms |
204 KB |
Output is correct |
| 61 |
Correct |
141 ms |
272 KB |
Output is correct |
| 62 |
Correct |
125 ms |
276 KB |
Output is correct |
| 63 |
Correct |
121 ms |
204 KB |
Output is correct |
| 64 |
Correct |
138 ms |
204 KB |
Output is correct |
| 65 |
Correct |
143 ms |
268 KB |
Output is correct |
