#include <stdio.h>
#include <algorithm>
using namespace std;
const double inf = 1e9;
int n;
struct P {
double x, y, g;
int idx;
} p[999];
inline bool cmp(P a, P b) {
return a.g < b.g;
}
int main() {
scanf("%d", &n);
for (int i = 1; i <= 3 * n; i++) {
scanf("%lf%lf", &p[i].x, &p[i].y);
p[i].g = (p[i].y - inf) / (p[i].x - 2 * inf);
p[i].idx = i;
}
sort(p + 1, p + 3 * n + 1, cmp);
for (int i = 1; i <= 3 * n; i += 3) printf("%d %d %d\n", p[i].idx, p[i + 1].idx, p[i + 2].idx);
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
1112 KB |
Output is correct |
2 |
Correct |
0 ms |
1112 KB |
Output is correct |
3 |
Correct |
0 ms |
1112 KB |
Output is correct |
4 |
Correct |
0 ms |
1112 KB |
Output is correct |
5 |
Correct |
0 ms |
1112 KB |
Output is correct |
6 |
Correct |
0 ms |
1112 KB |
Output is correct |
7 |
Correct |
0 ms |
1112 KB |
Output is correct |
8 |
Correct |
0 ms |
1112 KB |
Output is correct |
9 |
Correct |
1 ms |
1112 KB |
Output is correct |
10 |
Correct |
0 ms |
1112 KB |
Output is correct |
11 |
Correct |
0 ms |
1112 KB |
Output is correct |
12 |
Correct |
0 ms |
1112 KB |
Output is correct |
13 |
Correct |
0 ms |
1112 KB |
Output is correct |
14 |
Correct |
0 ms |
1112 KB |
Output is correct |
15 |
Correct |
0 ms |
1112 KB |
Output is correct |
16 |
Correct |
0 ms |
1112 KB |
Output is correct |
17 |
Correct |
0 ms |
1112 KB |
Output is correct |
18 |
Correct |
0 ms |
1112 KB |
Output is correct |
19 |
Correct |
0 ms |
1112 KB |
Output is correct |
20 |
Correct |
0 ms |
1112 KB |
Output is correct |