oj.uz

Submission #145916

# Submission time Handle Problem Language Result Execution time Memory
145916 2019-08-21T11:04:56 Z nvmdava Triangles (CEOI18_tri) C++17
75 / 100
 3000 ms 247712 KB 
#include <bits/stdc++.h>
#include "trilib.h"
 
#define ff first
#define ss second
#define ll long long
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
int n, root, t;

map<ll, bool> lol;

ll enc(ll a, ll b, ll c){
	return a * 40001 * 40001 + b * 40001 + c;
}

bool get(ll a, ll b, ll c){
	ll en = enc(a, b, c);
	if(lol.find(en) != lol.end())
		return lol[en];
	int res = is_clockwise(a, b, c);
	lol[enc(a, b, c)] = lol[enc(b, c, a)] = lol[enc(c, a, b)] = res;
	lol[enc(c, b, a)] = lol[enc(b, a, c)] = lol[enc(a, c, b)] = res ^ 1;
	return res;
}

class Compare{
	public:
		bool operator()(const int& lhs, const int& rhs){
			return get(root, lhs, rhs);
		}
};


set<int, Compare> le, ri;
vector<int> hull, hull2;
int main() {
 
	n = get_n();
 
 	root = rng() % n + 1;
 	t = rng() % n + 1;
 	while(root == t){
 		root = rng() % n + 1;
 		t = rng() % n + 1;
 	}
 	
 	for(int i = 1; i <= n; i++){
 		if(root == i || t == i) continue;
 		if(get(t, root, i))
 		 	ri.insert(i);
 		else 
 			le.insert(i);
 	}
 	
 	for(int x : le)
 		hull.push_back(x);
 	hull.push_back(root);
 	for(int x : ri)
 		hull.push_back(x);
 	hull.push_back(t);

 	int v1 = hull[0];
 	int v2 = hull[1];
 	hull2.push_back(v1);
 	hull2.push_back(v2);
 	for(int i = 2; i < hull.size(); i++){
 		while(hull2.size() > 2 && get(hull2[hull2.size() - 2], hull2[hull2.size() - 1], hull[i]) == 0) hull2.pop_back();
 		hull2.push_back(hull[i]);
 	}

 	swap(hull2, hull);
 	hull2.clear();

 	while(true){
 		for(int i = 0; i < hull.size(); i++){
 			int l = i - 1;
 			int r = i + 1;
 			if(l == -1) l = hull.size() - 1;
 			if(r == hull.size()) r = 0;
 			l = hull[l];
 			r = hull[r];
 			if(!hull2.empty())
 				l = hull2.back();

 			if(get(l, hull[i], r))
 				hull2.push_back(hull[i]);
 		}
 		swap(hull2, hull);
 		if(hull.size() == hull2.size()) break;
 		hull2.clear();
 	}
 	give_answer(hull.size());
}

Compilation message

tri.cpp: In function 'int main()':
tri.cpp:68:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 2; i < hull.size(); i++){
                  ~~^~~~~~~~~~~~~
tri.cpp:77:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i = 0; i < hull.size(); i++){
                   ~~^~~~~~~~~~~~~
tri.cpp:81:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(r == hull.size()) r = 0;
        ~~^~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 476 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 3 ms 504 KB Output is correct
22 Correct 3 ms 504 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 3 ms 504 KB Output is correct
26 Correct 3 ms 376 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 476 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 3 ms 504 KB Output is correct
22 Correct 3 ms 504 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 3 ms 504 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 252 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 256 KB Output is correct
32 Correct 12 ms 2168 KB Output is correct
33 Correct 12 ms 2168 KB Output is correct
34 Correct 12 ms 2168 KB Output is correct
35 Correct 13 ms 2268 KB Output is correct
36 Correct 11 ms 2040 KB Output is correct
37 Correct 11 ms 2040 KB Output is correct
38 Correct 12 ms 2168 KB Output is correct
39 Correct 12 ms 2168 KB Output is correct
40 Correct 12 ms 2168 KB Output is correct
41 Correct 12 ms 2168 KB Output is correct
42 Correct 12 ms 2168 KB Output is correct
43 Correct 12 ms 2296 KB Output is correct
44 Correct 12 ms 2296 KB Output is correct
45 Correct 12 ms 2172 KB Output is correct
46 Correct 12 ms 2168 KB Output is correct
47 Correct 12 ms 2232 KB Output is correct
48 Correct 12 ms 2168 KB Output is correct
49 Correct 12 ms 2168 KB Output is correct
50 Correct 12 ms 2168 KB Output is correct
51 Correct 13 ms 2936 KB Output is correct
52 Correct 14 ms 2936 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 476 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 3 ms 504 KB Output is correct
22 Correct 3 ms 504 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 3 ms 504 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 252 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 256 KB Output is correct
32 Correct 12 ms 2168 KB Output is correct
33 Correct 12 ms 2168 KB Output is correct
34 Correct 12 ms 2168 KB Output is correct
35 Correct 13 ms 2268 KB Output is correct
36 Correct 11 ms 2040 KB Output is correct
37 Correct 11 ms 2040 KB Output is correct
38 Correct 12 ms 2168 KB Output is correct
39 Correct 12 ms 2168 KB Output is correct
40 Correct 12 ms 2168 KB Output is correct
41 Correct 12 ms 2168 KB Output is correct
42 Correct 12 ms 2168 KB Output is correct
43 Correct 12 ms 2296 KB Output is correct
44 Correct 12 ms 2296 KB Output is correct
45 Correct 12 ms 2172 KB Output is correct
46 Correct 12 ms 2168 KB Output is correct
47 Correct 12 ms 2232 KB Output is correct
48 Correct 12 ms 2168 KB Output is correct
49 Correct 12 ms 2168 KB Output is correct
50 Correct 12 ms 2168 KB Output is correct
51 Correct 13 ms 2936 KB Output is correct
52 Correct 14 ms 2936 KB Output is correct
53 Correct 2 ms 380 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 3 ms 256 KB Output is correct
56 Correct 2 ms 256 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 1095 ms 87220 KB Output is correct
59 Correct 1044 ms 84892 KB Output is correct
60 Correct 1016 ms 85352 KB Output is correct
61 Correct 1002 ms 84456 KB Output is correct
62 Correct 1008 ms 79980 KB Output is correct
63 Correct 1037 ms 79372 KB Output is correct
64 Correct 1136 ms 80276 KB Output is correct
65 Correct 1018 ms 81548 KB Output is correct
66 Correct 972 ms 84472 KB Output is correct
67 Correct 1010 ms 85440 KB Output is correct
68 Correct 1004 ms 86884 KB Output is correct
69 Correct 993 ms 87928 KB Output is correct
70 Correct 1077 ms 84440 KB Output is correct
71 Correct 962 ms 83452 KB Output is correct
72 Correct 975 ms 84600 KB Output is correct
73 Correct 949 ms 85172 KB Output is correct
74 Correct 993 ms 86360 KB Output is correct
75 Correct 978 ms 84516 KB Output is correct
76 Correct 953 ms 84736 KB Output is correct
77 Correct 893 ms 126968 KB Output is correct
78 Correct 919 ms 128504 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 380 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 3 ms 504 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 476 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 3 ms 504 KB Output is correct
22 Correct 3 ms 504 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 3 ms 504 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 252 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 256 KB Output is correct
32 Correct 12 ms 2168 KB Output is correct
33 Correct 12 ms 2168 KB Output is correct
34 Correct 12 ms 2168 KB Output is correct
35 Correct 13 ms 2268 KB Output is correct
36 Correct 11 ms 2040 KB Output is correct
37 Correct 11 ms 2040 KB Output is correct
38 Correct 12 ms 2168 KB Output is correct
39 Correct 12 ms 2168 KB Output is correct
40 Correct 12 ms 2168 KB Output is correct
41 Correct 12 ms 2168 KB Output is correct
42 Correct 12 ms 2168 KB Output is correct
43 Correct 12 ms 2296 KB Output is correct
44 Correct 12 ms 2296 KB Output is correct
45 Correct 12 ms 2172 KB Output is correct
46 Correct 12 ms 2168 KB Output is correct
47 Correct 12 ms 2232 KB Output is correct
48 Correct 12 ms 2168 KB Output is correct
49 Correct 12 ms 2168 KB Output is correct
50 Correct 12 ms 2168 KB Output is correct
51 Correct 13 ms 2936 KB Output is correct
52 Correct 14 ms 2936 KB Output is correct
53 Correct 2 ms 380 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 3 ms 256 KB Output is correct
56 Correct 2 ms 256 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 1095 ms 87220 KB Output is correct
59 Correct 1044 ms 84892 KB Output is correct
60 Correct 1016 ms 85352 KB Output is correct
61 Correct 1002 ms 84456 KB Output is correct
62 Correct 1008 ms 79980 KB Output is correct
63 Correct 1037 ms 79372 KB Output is correct
64 Correct 1136 ms 80276 KB Output is correct
65 Correct 1018 ms 81548 KB Output is correct
66 Correct 972 ms 84472 KB Output is correct
67 Correct 1010 ms 85440 KB Output is correct
68 Correct 1004 ms 86884 KB Output is correct
69 Correct 993 ms 87928 KB Output is correct
70 Correct 1077 ms 84440 KB Output is correct
71 Correct 962 ms 83452 KB Output is correct
72 Correct 975 ms 84600 KB Output is correct
73 Correct 949 ms 85172 KB Output is correct
74 Correct 993 ms 86360 KB Output is correct
75 Correct 978 ms 84516 KB Output is correct
76 Correct 953 ms 84736 KB Output is correct
77 Correct 893 ms 126968 KB Output is correct
78 Correct 919 ms 128504 KB Output is correct
79 Correct 2 ms 256 KB Output is correct
80 Correct 2 ms 256 KB Output is correct
81 Correct 2 ms 376 KB Output is correct
82 Correct 2 ms 256 KB Output is correct
83 Correct 2 ms 256 KB Output is correct
84 Correct 5 ms 256 KB Output is correct
85 Correct 2 ms 256 KB Output is correct
86 Correct 2 ms 256 KB Output is correct
87 Correct 2 ms 256 KB Output is correct
88 Correct 2 ms 380 KB Output is correct
89 Correct 2 ms 256 KB Output is correct
90 Correct 2 ms 376 KB Output is correct
91 Correct 2 ms 256 KB Output is correct
92 Correct 2 ms 256 KB Output is correct
93 Correct 2 ms 376 KB Output is correct
94 Correct 2 ms 256 KB Output is correct
95 Correct 2 ms 376 KB Output is correct
96 Correct 2 ms 376 KB Output is correct
97 Correct 2 ms 256 KB Output is correct
98 Correct 2 ms 376 KB Output is correct
99 Correct 2 ms 256 KB Output is correct
100 Correct 2 ms 376 KB Output is correct
101 Correct 2 ms 376 KB Output is correct
102 Correct 2 ms 376 KB Output is correct
103 Correct 2 ms 376 KB Output is correct
104 Correct 3 ms 504 KB Output is correct
105 Correct 2 ms 376 KB Output is correct
106 Correct 2 ms 256 KB Output is correct
107 Correct 2 ms 376 KB Output is correct
108 Correct 2 ms 256 KB Output is correct
109 Correct 2 ms 376 KB Output is correct
110 Execution timed out 3060 ms 247712 KB Time limit exceeded
111 Halted 0 ms 0 KB -