Submission #145913

# Submission time Handle Problem Language Result Execution time Memory
145913 2019-08-21T11:00:11 Z nvmdava Triangles (CEOI18_tri) C++17
75 / 100
436 ms 66308 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;

bool get(ll a, ll b, ll c){
	ll en = a * 40001 * 40001 + b * 40001 + c;
	if(lol.find(en) != lol.end())
		return lol[en];
	return lol[en] = is_clockwise(a, b, c);
}

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:61:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 2; i < hull.size(); i++){
                  ~~^~~~~~~~~~~~~
tri.cpp:70:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i = 0; i < hull.size(); i++){
                   ~~^~~~~~~~~~~~~
tri.cpp:74:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(r == hull.size()) r = 0;
        ~~^~~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 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 376 KB Output is correct
6 Correct 2 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 2 ms 376 KB Output is correct
19 Correct 2 ms 380 KB Output is correct
20 Correct 2 ms 380 KB Output is correct
21 Correct 2 ms 380 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 2 ms 376 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 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 376 KB Output is correct
6 Correct 2 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 2 ms 376 KB Output is correct
19 Correct 2 ms 380 KB Output is correct
20 Correct 2 ms 380 KB Output is correct
21 Correct 2 ms 380 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 2 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 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 1 ms 376 KB Output is correct
32 Correct 4 ms 760 KB Output is correct
33 Correct 4 ms 788 KB Output is correct
34 Correct 4 ms 632 KB Output is correct
35 Correct 4 ms 632 KB Output is correct
36 Correct 4 ms 760 KB Output is correct
37 Correct 4 ms 632 KB Output is correct
38 Correct 4 ms 632 KB Output is correct
39 Correct 4 ms 632 KB Output is correct
40 Correct 4 ms 632 KB Output is correct
41 Correct 4 ms 760 KB Output is correct
42 Correct 4 ms 760 KB Output is correct
43 Correct 4 ms 760 KB Output is correct
44 Correct 4 ms 632 KB Output is correct
45 Correct 4 ms 632 KB Output is correct
46 Correct 4 ms 632 KB Output is correct
47 Correct 4 ms 760 KB Output is correct
48 Correct 4 ms 760 KB Output is correct
49 Correct 4 ms 760 KB Output is correct
50 Correct 4 ms 760 KB Output is correct
51 Correct 4 ms 760 KB Output is correct
52 Correct 4 ms 760 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 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 376 KB Output is correct
6 Correct 2 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 2 ms 376 KB Output is correct
19 Correct 2 ms 380 KB Output is correct
20 Correct 2 ms 380 KB Output is correct
21 Correct 2 ms 380 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 2 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 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 1 ms 376 KB Output is correct
32 Correct 4 ms 760 KB Output is correct
33 Correct 4 ms 788 KB Output is correct
34 Correct 4 ms 632 KB Output is correct
35 Correct 4 ms 632 KB Output is correct
36 Correct 4 ms 760 KB Output is correct
37 Correct 4 ms 632 KB Output is correct
38 Correct 4 ms 632 KB Output is correct
39 Correct 4 ms 632 KB Output is correct
40 Correct 4 ms 632 KB Output is correct
41 Correct 4 ms 760 KB Output is correct
42 Correct 4 ms 760 KB Output is correct
43 Correct 4 ms 760 KB Output is correct
44 Correct 4 ms 632 KB Output is correct
45 Correct 4 ms 632 KB Output is correct
46 Correct 4 ms 632 KB Output is correct
47 Correct 4 ms 760 KB Output is correct
48 Correct 4 ms 760 KB Output is correct
49 Correct 4 ms 760 KB Output is correct
50 Correct 4 ms 760 KB Output is correct
51 Correct 4 ms 760 KB Output is correct
52 Correct 4 ms 760 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 2 ms 380 KB Output is correct
56 Correct 2 ms 376 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 145 ms 16248 KB Output is correct
59 Correct 111 ms 16056 KB Output is correct
60 Correct 110 ms 16120 KB Output is correct
61 Correct 110 ms 16120 KB Output is correct
62 Correct 107 ms 15224 KB Output is correct
63 Correct 105 ms 15480 KB Output is correct
64 Correct 105 ms 15228 KB Output is correct
65 Correct 107 ms 15356 KB Output is correct
66 Correct 116 ms 16504 KB Output is correct
67 Correct 114 ms 16164 KB Output is correct
68 Correct 114 ms 16632 KB Output is correct
69 Correct 113 ms 16376 KB Output is correct
70 Correct 110 ms 16120 KB Output is correct
71 Correct 111 ms 15992 KB Output is correct
72 Correct 110 ms 16120 KB Output is correct
73 Correct 110 ms 16104 KB Output is correct
74 Correct 107 ms 16120 KB Output is correct
75 Correct 104 ms 16248 KB Output is correct
76 Correct 113 ms 16760 KB Output is correct
77 Correct 111 ms 22392 KB Output is correct
78 Correct 145 ms 23416 KB Output is correct
# 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 256 KB Output is correct
4 Correct 2 ms 256 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 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 252 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 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 3 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 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 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 376 KB Output is correct
6 Correct 2 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 2 ms 376 KB Output is correct
19 Correct 2 ms 380 KB Output is correct
20 Correct 2 ms 380 KB Output is correct
21 Correct 2 ms 380 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 2 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 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 1 ms 376 KB Output is correct
32 Correct 4 ms 760 KB Output is correct
33 Correct 4 ms 788 KB Output is correct
34 Correct 4 ms 632 KB Output is correct
35 Correct 4 ms 632 KB Output is correct
36 Correct 4 ms 760 KB Output is correct
37 Correct 4 ms 632 KB Output is correct
38 Correct 4 ms 632 KB Output is correct
39 Correct 4 ms 632 KB Output is correct
40 Correct 4 ms 632 KB Output is correct
41 Correct 4 ms 760 KB Output is correct
42 Correct 4 ms 760 KB Output is correct
43 Correct 4 ms 760 KB Output is correct
44 Correct 4 ms 632 KB Output is correct
45 Correct 4 ms 632 KB Output is correct
46 Correct 4 ms 632 KB Output is correct
47 Correct 4 ms 760 KB Output is correct
48 Correct 4 ms 760 KB Output is correct
49 Correct 4 ms 760 KB Output is correct
50 Correct 4 ms 760 KB Output is correct
51 Correct 4 ms 760 KB Output is correct
52 Correct 4 ms 760 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 2 ms 380 KB Output is correct
56 Correct 2 ms 376 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 145 ms 16248 KB Output is correct
59 Correct 111 ms 16056 KB Output is correct
60 Correct 110 ms 16120 KB Output is correct
61 Correct 110 ms 16120 KB Output is correct
62 Correct 107 ms 15224 KB Output is correct
63 Correct 105 ms 15480 KB Output is correct
64 Correct 105 ms 15228 KB Output is correct
65 Correct 107 ms 15356 KB Output is correct
66 Correct 116 ms 16504 KB Output is correct
67 Correct 114 ms 16164 KB Output is correct
68 Correct 114 ms 16632 KB Output is correct
69 Correct 113 ms 16376 KB Output is correct
70 Correct 110 ms 16120 KB Output is correct
71 Correct 111 ms 15992 KB Output is correct
72 Correct 110 ms 16120 KB Output is correct
73 Correct 110 ms 16104 KB Output is correct
74 Correct 107 ms 16120 KB Output is correct
75 Correct 104 ms 16248 KB Output is correct
76 Correct 113 ms 16760 KB Output is correct
77 Correct 111 ms 22392 KB Output is correct
78 Correct 145 ms 23416 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 256 KB Output is correct
82 Correct 2 ms 256 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 256 KB Output is correct
87 Correct 2 ms 256 KB Output is correct
88 Correct 2 ms 252 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 376 KB Output is correct
92 Correct 2 ms 376 KB Output is correct
93 Correct 3 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 256 KB Output is correct
97 Correct 2 ms 256 KB Output is correct
98 Correct 2 ms 256 KB Output is correct
99 Correct 2 ms 256 KB Output is correct
100 Correct 2 ms 256 KB Output is correct
101 Correct 2 ms 376 KB Output is correct
102 Correct 2 ms 348 KB Output is correct
103 Correct 2 ms 376 KB Output is correct
104 Correct 2 ms 376 KB Output is correct
105 Correct 2 ms 376 KB Output is correct
106 Correct 2 ms 376 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 Correct 373 ms 47108 KB Output is correct
111 Correct 363 ms 46716 KB Output is correct
112 Correct 389 ms 46052 KB Output is correct
113 Correct 368 ms 46488 KB Output is correct
114 Correct 365 ms 44388 KB Output is correct
115 Correct 359 ms 44532 KB Output is correct
116 Correct 384 ms 43888 KB Output is correct
117 Correct 348 ms 43860 KB Output is correct
118 Correct 383 ms 45940 KB Output is correct
119 Correct 424 ms 47732 KB Output is correct
120 Correct 382 ms 46868 KB Output is correct
121 Correct 366 ms 46324 KB Output is correct
122 Correct 388 ms 46684 KB Output is correct
123 Correct 383 ms 46104 KB Output is correct
124 Correct 368 ms 46072 KB Output is correct
125 Correct 356 ms 46748 KB Output is correct
126 Correct 370 ms 46888 KB Output is correct
127 Correct 374 ms 46148 KB Output is correct
128 Correct 436 ms 46068 KB Output is correct
129 Incorrect 355 ms 66308 KB Output isn't correct
130 Halted 0 ms 0 KB -