oj.uz

Submission #145917

# Submission time Handle Problem Language Result Execution time Memory
145917 2019-08-21T11:05:56 Z nvmdava Triangles (CEOI18_tri) C++17
75 / 100
 3000 ms 207968 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;

unordered_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 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 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 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 2 ms 380 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 504 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 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 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 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 2 ms 380 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 504 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 10 ms 1784 KB Output is correct
33 Correct 9 ms 1784 KB Output is correct
34 Correct 9 ms 1784 KB Output is correct
35 Correct 9 ms 1788 KB Output is correct
36 Correct 9 ms 1784 KB Output is correct
37 Correct 10 ms 1784 KB Output is correct
38 Correct 9 ms 1784 KB Output is correct
39 Correct 8 ms 1400 KB Output is correct
40 Correct 9 ms 1784 KB Output is correct
41 Correct 9 ms 1784 KB Output is correct
42 Correct 9 ms 1788 KB Output is correct
43 Correct 10 ms 1788 KB Output is correct
44 Correct 10 ms 1728 KB Output is correct
45 Correct 9 ms 1784 KB Output is correct
46 Correct 9 ms 1784 KB Output is correct
47 Correct 10 ms 1832 KB Output is correct
48 Correct 9 ms 1784 KB Output is correct
49 Correct 9 ms 1784 KB Output is correct
50 Correct 9 ms 1788 KB Output is correct
51 Correct 11 ms 2088 KB Output is correct
52 Correct 11 ms 2088 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 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 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 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 2 ms 380 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 504 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 10 ms 1784 KB Output is correct
33 Correct 9 ms 1784 KB Output is correct
34 Correct 9 ms 1784 KB Output is correct
35 Correct 9 ms 1788 KB Output is correct
36 Correct 9 ms 1784 KB Output is correct
37 Correct 10 ms 1784 KB Output is correct
38 Correct 9 ms 1784 KB Output is correct
39 Correct 8 ms 1400 KB Output is correct
40 Correct 9 ms 1784 KB Output is correct
41 Correct 9 ms 1784 KB Output is correct
42 Correct 9 ms 1788 KB Output is correct
43 Correct 10 ms 1788 KB Output is correct
44 Correct 10 ms 1728 KB Output is correct
45 Correct 9 ms 1784 KB Output is correct
46 Correct 9 ms 1784 KB Output is correct
47 Correct 10 ms 1832 KB Output is correct
48 Correct 9 ms 1784 KB Output is correct
49 Correct 9 ms 1784 KB Output is correct
50 Correct 9 ms 1788 KB Output is correct
51 Correct 11 ms 2088 KB Output is correct
52 Correct 11 ms 2088 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 2 ms 256 KB Output is correct
55 Correct 2 ms 276 KB Output is correct
56 Correct 2 ms 256 KB Output is correct
57 Correct 2 ms 256 KB Output is correct
58 Correct 853 ms 59656 KB Output is correct
59 Correct 790 ms 57432 KB Output is correct
60 Correct 783 ms 57652 KB Output is correct
61 Correct 784 ms 57808 KB Output is correct
62 Correct 731 ms 54928 KB Output is correct
63 Correct 735 ms 56032 KB Output is correct
64 Correct 832 ms 56656 KB Output is correct
65 Correct 790 ms 54696 KB Output is correct
66 Correct 785 ms 58044 KB Output is correct
67 Correct 797 ms 57384 KB Output is correct
68 Correct 782 ms 58156 KB Output is correct
69 Correct 815 ms 58328 KB Output is correct
70 Correct 781 ms 57936 KB Output is correct
71 Correct 801 ms 58404 KB Output is correct
72 Correct 907 ms 57428 KB Output is correct
73 Correct 812 ms 57684 KB Output is correct
74 Correct 797 ms 57296 KB Output is correct
75 Correct 774 ms 57428 KB Output is correct
76 Correct 797 ms 57552 KB Output is correct
77 Correct 1310 ms 102164 KB Output is correct
78 Correct 1329 ms 102240 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 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 256 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 424 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 3 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 3 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 3 ms 632 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 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 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 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 2 ms 380 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 504 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 10 ms 1784 KB Output is correct
33 Correct 9 ms 1784 KB Output is correct
34 Correct 9 ms 1784 KB Output is correct
35 Correct 9 ms 1788 KB Output is correct
36 Correct 9 ms 1784 KB Output is correct
37 Correct 10 ms 1784 KB Output is correct
38 Correct 9 ms 1784 KB Output is correct
39 Correct 8 ms 1400 KB Output is correct
40 Correct 9 ms 1784 KB Output is correct
41 Correct 9 ms 1784 KB Output is correct
42 Correct 9 ms 1788 KB Output is correct
43 Correct 10 ms 1788 KB Output is correct
44 Correct 10 ms 1728 KB Output is correct
45 Correct 9 ms 1784 KB Output is correct
46 Correct 9 ms 1784 KB Output is correct
47 Correct 10 ms 1832 KB Output is correct
48 Correct 9 ms 1784 KB Output is correct
49 Correct 9 ms 1784 KB Output is correct
50 Correct 9 ms 1788 KB Output is correct
51 Correct 11 ms 2088 KB Output is correct
52 Correct 11 ms 2088 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 2 ms 256 KB Output is correct
55 Correct 2 ms 276 KB Output is correct
56 Correct 2 ms 256 KB Output is correct
57 Correct 2 ms 256 KB Output is correct
58 Correct 853 ms 59656 KB Output is correct
59 Correct 790 ms 57432 KB Output is correct
60 Correct 783 ms 57652 KB Output is correct
61 Correct 784 ms 57808 KB Output is correct
62 Correct 731 ms 54928 KB Output is correct
63 Correct 735 ms 56032 KB Output is correct
64 Correct 832 ms 56656 KB Output is correct
65 Correct 790 ms 54696 KB Output is correct
66 Correct 785 ms 58044 KB Output is correct
67 Correct 797 ms 57384 KB Output is correct
68 Correct 782 ms 58156 KB Output is correct
69 Correct 815 ms 58328 KB Output is correct
70 Correct 781 ms 57936 KB Output is correct
71 Correct 801 ms 58404 KB Output is correct
72 Correct 907 ms 57428 KB Output is correct
73 Correct 812 ms 57684 KB Output is correct
74 Correct 797 ms 57296 KB Output is correct
75 Correct 774 ms 57428 KB Output is correct
76 Correct 797 ms 57552 KB Output is correct
77 Correct 1310 ms 102164 KB Output is correct
78 Correct 1329 ms 102240 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 376 KB Output is correct
83 Correct 2 ms 256 KB Output is correct
84 Correct 2 ms 256 KB Output is correct
85 Correct 2 ms 376 KB Output is correct
86 Correct 2 ms 508 KB Output is correct
87 Correct 2 ms 256 KB Output is correct
88 Correct 2 ms 376 KB Output is correct
89 Correct 2 ms 376 KB Output is correct
90 Correct 3 ms 424 KB Output is correct
91 Correct 2 ms 376 KB Output is correct
92 Correct 2 ms 376 KB Output is correct
93 Correct 2 ms 376 KB Output is correct
94 Correct 2 ms 376 KB Output is correct
95 Correct 2 ms 376 KB Output is correct
96 Correct 2 ms 376 KB Output is correct
97 Correct 3 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 3 ms 376 KB Output is correct
101 Correct 2 ms 376 KB Output is correct
102 Correct 3 ms 376 KB Output is correct
103 Correct 2 ms 376 KB Output is correct
104 Correct 3 ms 632 KB Output is correct
105 Correct 2 ms 256 KB Output is correct
106 Correct 2 ms 256 KB Output is correct
107 Correct 2 ms 256 KB Output is correct
108 Correct 2 ms 256 KB Output is correct
109 Correct 2 ms 256 KB Output is correct
110 Execution timed out 3054 ms 207968 KB Time limit exceeded
111 Halted 0 ms 0 KB -