# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
960565 |
2024-04-10T15:54:10 Z |
vjudge1 |
Triangles (CEOI18_tri) |
C++14 |
|
19 ms |
2956 KB |
#include "trilib.h"
#include<bits/stdc++.h>
using namespace std;
int n;
vector<int> convex_hull(vector<int> v){
vector<int> v2;
for (int i:v){
while ((int)v2.size()>=2 && is_clockwise(v2.end()[-2], v2.end()[-1], i)) v2.pop_back();
v2.push_back(i);
}
return v2;
}
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
n=get_n();
vector<int> v(n);
iota(v.begin(), v.end(), 1);
vector<vector<int>> vv(2);
for (int i=2; i<n; ++i) vv[is_clockwise(v[0], v[1], v[i])].push_back(v[i]);
vv[0].push_back(v[1]);
vv[1].push_back(v[1]);
auto cmp=[&](int x, int y){
return !is_clockwise(v[0], x, y);
};
function<void(vector<int> &)> merge_sort=[&](vector<int> &v) -> void {
if ((int)v.size()<=1) return;
vector<int> vl(v.begin(), v.begin()+(int)v.size()/2);
vector<int> vr(v.begin()+(int)v.size()/2, v.end());
merge_sort(vl);
merge_sort(vr);
merge(vl.begin(), vl.end(), vr.begin(), vr.end(), v.begin(), cmp);
};
merge_sort(vv[0]);
merge_sort(vv[1]);
vv[0].insert(vv[0].begin(), v[0]);
vv[1].insert(vv[1].begin(), v[0]);
vv[0]=convex_hull(vv[0]);
vv[1]=convex_hull(vv[1]);
bool rev=0;
if (vv[0].back()!=v[1]) reverse(vv[0].begin()+1, vv[0].end()), rev=1;
if (vv[1].back()!=v[1]) reverse(vv[1].begin()+1, vv[0].end());
else rev=1;
v.swap(vv[0]);
v.insert(v.end(), vv[1].rbegin()+1, vv[1].rend()-1);
if (rev) reverse(v.begin()+1, v.end());
vector<int> v2;
for (int i:v){
while ((int)v2.size()>=2 && is_clockwise(v2.end()[-2], v2.end()[-1], i)) v2.pop_back();
v2.push_back(i);
}
for (int i:v){
while ((int)v2.size()>=2 && is_clockwise(v2.end()[-2], v2.end()[-1], i)) v2.pop_back();
v2.push_back(i);
}
vector<int> cnt(n+1);
for (int i:v2) ++cnt[i];
while (cnt[v2.back()]==1) v2.pop_back();
reverse(v2.begin(), v2.end());
while (cnt[v2.back()]==1) v2.pop_back();
give_answer((int)v2.size()/2);
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
424 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
360 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
344 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
424 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
360 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
344 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
460 KB |
Output is correct |
32 |
Correct |
1 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
1 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
1 ms |
344 KB |
Output is correct |
37 |
Correct |
1 ms |
344 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
1 ms |
344 KB |
Output is correct |
41 |
Correct |
1 ms |
344 KB |
Output is correct |
42 |
Correct |
1 ms |
348 KB |
Output is correct |
43 |
Correct |
0 ms |
348 KB |
Output is correct |
44 |
Correct |
1 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
1 ms |
344 KB |
Output is correct |
48 |
Correct |
1 ms |
348 KB |
Output is correct |
49 |
Correct |
1 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
344 KB |
Output is correct |
51 |
Correct |
1 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
424 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
360 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
344 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
460 KB |
Output is correct |
32 |
Correct |
1 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
1 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
1 ms |
344 KB |
Output is correct |
37 |
Correct |
1 ms |
344 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
1 ms |
344 KB |
Output is correct |
41 |
Correct |
1 ms |
344 KB |
Output is correct |
42 |
Correct |
1 ms |
348 KB |
Output is correct |
43 |
Correct |
0 ms |
348 KB |
Output is correct |
44 |
Correct |
1 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
1 ms |
344 KB |
Output is correct |
48 |
Correct |
1 ms |
348 KB |
Output is correct |
49 |
Correct |
1 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
344 KB |
Output is correct |
51 |
Correct |
1 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
348 KB |
Output is correct |
53 |
Correct |
0 ms |
348 KB |
Output is correct |
54 |
Correct |
0 ms |
348 KB |
Output is correct |
55 |
Correct |
0 ms |
348 KB |
Output is correct |
56 |
Correct |
1 ms |
344 KB |
Output is correct |
57 |
Correct |
0 ms |
348 KB |
Output is correct |
58 |
Correct |
6 ms |
892 KB |
Output is correct |
59 |
Correct |
6 ms |
860 KB |
Output is correct |
60 |
Correct |
6 ms |
860 KB |
Output is correct |
61 |
Correct |
6 ms |
860 KB |
Output is correct |
62 |
Correct |
6 ms |
1112 KB |
Output is correct |
63 |
Correct |
6 ms |
1112 KB |
Output is correct |
64 |
Correct |
6 ms |
1112 KB |
Output is correct |
65 |
Correct |
6 ms |
1116 KB |
Output is correct |
66 |
Correct |
6 ms |
860 KB |
Output is correct |
67 |
Correct |
6 ms |
860 KB |
Output is correct |
68 |
Correct |
6 ms |
860 KB |
Output is correct |
69 |
Correct |
6 ms |
860 KB |
Output is correct |
70 |
Correct |
6 ms |
860 KB |
Output is correct |
71 |
Correct |
6 ms |
860 KB |
Output is correct |
72 |
Correct |
6 ms |
880 KB |
Output is correct |
73 |
Correct |
6 ms |
844 KB |
Output is correct |
74 |
Correct |
7 ms |
860 KB |
Output is correct |
75 |
Correct |
6 ms |
860 KB |
Output is correct |
76 |
Correct |
6 ms |
860 KB |
Output is correct |
77 |
Correct |
4 ms |
1116 KB |
Output is correct |
78 |
Correct |
4 ms |
1116 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
344 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
424 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
424 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
360 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
344 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
460 KB |
Output is correct |
32 |
Correct |
1 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
1 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
1 ms |
344 KB |
Output is correct |
37 |
Correct |
1 ms |
344 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
1 ms |
344 KB |
Output is correct |
41 |
Correct |
1 ms |
344 KB |
Output is correct |
42 |
Correct |
1 ms |
348 KB |
Output is correct |
43 |
Correct |
0 ms |
348 KB |
Output is correct |
44 |
Correct |
1 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
1 ms |
344 KB |
Output is correct |
48 |
Correct |
1 ms |
348 KB |
Output is correct |
49 |
Correct |
1 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
344 KB |
Output is correct |
51 |
Correct |
1 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
348 KB |
Output is correct |
53 |
Correct |
0 ms |
348 KB |
Output is correct |
54 |
Correct |
0 ms |
348 KB |
Output is correct |
55 |
Correct |
0 ms |
348 KB |
Output is correct |
56 |
Correct |
1 ms |
344 KB |
Output is correct |
57 |
Correct |
0 ms |
348 KB |
Output is correct |
58 |
Correct |
6 ms |
892 KB |
Output is correct |
59 |
Correct |
6 ms |
860 KB |
Output is correct |
60 |
Correct |
6 ms |
860 KB |
Output is correct |
61 |
Correct |
6 ms |
860 KB |
Output is correct |
62 |
Correct |
6 ms |
1112 KB |
Output is correct |
63 |
Correct |
6 ms |
1112 KB |
Output is correct |
64 |
Correct |
6 ms |
1112 KB |
Output is correct |
65 |
Correct |
6 ms |
1116 KB |
Output is correct |
66 |
Correct |
6 ms |
860 KB |
Output is correct |
67 |
Correct |
6 ms |
860 KB |
Output is correct |
68 |
Correct |
6 ms |
860 KB |
Output is correct |
69 |
Correct |
6 ms |
860 KB |
Output is correct |
70 |
Correct |
6 ms |
860 KB |
Output is correct |
71 |
Correct |
6 ms |
860 KB |
Output is correct |
72 |
Correct |
6 ms |
880 KB |
Output is correct |
73 |
Correct |
6 ms |
844 KB |
Output is correct |
74 |
Correct |
7 ms |
860 KB |
Output is correct |
75 |
Correct |
6 ms |
860 KB |
Output is correct |
76 |
Correct |
6 ms |
860 KB |
Output is correct |
77 |
Correct |
4 ms |
1116 KB |
Output is correct |
78 |
Correct |
4 ms |
1116 KB |
Output is correct |
79 |
Correct |
1 ms |
348 KB |
Output is correct |
80 |
Correct |
0 ms |
348 KB |
Output is correct |
81 |
Correct |
0 ms |
348 KB |
Output is correct |
82 |
Correct |
0 ms |
348 KB |
Output is correct |
83 |
Correct |
0 ms |
348 KB |
Output is correct |
84 |
Correct |
0 ms |
348 KB |
Output is correct |
85 |
Correct |
0 ms |
348 KB |
Output is correct |
86 |
Correct |
0 ms |
348 KB |
Output is correct |
87 |
Correct |
0 ms |
348 KB |
Output is correct |
88 |
Correct |
0 ms |
348 KB |
Output is correct |
89 |
Correct |
0 ms |
348 KB |
Output is correct |
90 |
Correct |
0 ms |
348 KB |
Output is correct |
91 |
Correct |
0 ms |
348 KB |
Output is correct |
92 |
Correct |
1 ms |
348 KB |
Output is correct |
93 |
Correct |
1 ms |
348 KB |
Output is correct |
94 |
Correct |
0 ms |
348 KB |
Output is correct |
95 |
Correct |
1 ms |
348 KB |
Output is correct |
96 |
Correct |
1 ms |
344 KB |
Output is correct |
97 |
Correct |
0 ms |
348 KB |
Output is correct |
98 |
Correct |
0 ms |
348 KB |
Output is correct |
99 |
Correct |
1 ms |
348 KB |
Output is correct |
100 |
Correct |
0 ms |
348 KB |
Output is correct |
101 |
Correct |
0 ms |
348 KB |
Output is correct |
102 |
Correct |
1 ms |
424 KB |
Output is correct |
103 |
Correct |
0 ms |
348 KB |
Output is correct |
104 |
Correct |
1 ms |
348 KB |
Output is correct |
105 |
Correct |
0 ms |
348 KB |
Output is correct |
106 |
Correct |
0 ms |
348 KB |
Output is correct |
107 |
Correct |
1 ms |
348 KB |
Output is correct |
108 |
Correct |
1 ms |
504 KB |
Output is correct |
109 |
Correct |
0 ms |
348 KB |
Output is correct |
110 |
Correct |
16 ms |
1616 KB |
Output is correct |
111 |
Correct |
19 ms |
1628 KB |
Output is correct |
112 |
Correct |
16 ms |
1716 KB |
Output is correct |
113 |
Correct |
16 ms |
1532 KB |
Output is correct |
114 |
Correct |
16 ms |
2384 KB |
Output is correct |
115 |
Correct |
17 ms |
2300 KB |
Output is correct |
116 |
Correct |
17 ms |
2364 KB |
Output is correct |
117 |
Correct |
16 ms |
2172 KB |
Output is correct |
118 |
Correct |
16 ms |
1532 KB |
Output is correct |
119 |
Correct |
15 ms |
1880 KB |
Output is correct |
120 |
Correct |
16 ms |
1880 KB |
Output is correct |
121 |
Correct |
16 ms |
1628 KB |
Output is correct |
122 |
Correct |
15 ms |
1628 KB |
Output is correct |
123 |
Correct |
17 ms |
1628 KB |
Output is correct |
124 |
Correct |
16 ms |
1624 KB |
Output is correct |
125 |
Correct |
15 ms |
1628 KB |
Output is correct |
126 |
Correct |
16 ms |
1580 KB |
Output is correct |
127 |
Correct |
15 ms |
1628 KB |
Output is correct |
128 |
Correct |
15 ms |
1624 KB |
Output is correct |
129 |
Correct |
11 ms |
2236 KB |
Output is correct |
130 |
Correct |
12 ms |
2956 KB |
Output is correct |