답안 #122687

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
122687	2019-06-29T06:44:06 Z	김세빈(#2998)	Bulldozer (JOI17_bulldozer)	C++14	100 / 100	1091 ms	64088 KB

bulldozer

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair <ll, ll> pll;

struct point{
	ll x, y, c;
	point() {}
	point(ll x, ll y, ll c) : x(x), y(y), c(c) {}
};

struct node{
	ll mv, lv, rv, s;
	
	node() {}
	node(ll v) { s = v; mv = lv = rv = max(0ll, v); }
	
	node operator+ (node &n)
	{
		node ret;
		
		ret.s = s + n.s;
		ret.lv = max(lv, s + n.lv);
		ret.rv = max(n.rv, n.s + rv);
		ret.mv = max(max(mv, n.mv), rv + n.lv);
		
		return ret;
	}
};

node T[5050];
vector <point> P;
vector <pll> V;
ll K[2020];
ll sz = 1 << 11;
ll n, ans;

ll cross(pll va, pll vb)
{
	va = pll(P[va.second].x - P[va.first].x, P[va.second].y - P[va.first].y);
	vb = pll(P[vb.second].x - P[vb.first].x, P[vb.second].y - P[vb.first].y);
	return va.first * vb.second - vb.first * va.second;
}

void insert(ll p, ll v)
{
	p += sz; T[p] = node(v);
	
	for(p>>=1; p; p>>=1){
		T[p] = T[p << 1] + T[p << 1 | 1];
	}
}

ll get(ll l, ll r)
{
	node ls(0), rs(0);
	
	l += sz; r += sz;
	
	for(; l<=r; ){
		if(l & 1) ls = ls + T[l];
		if(~r & 1) rs = T[r] + rs;
		l = l + 1 >> 1;
		r = r - 1 >> 1;
	}
	
	return (ls + rs).mv;
}

int main()
{
	vector <ll> X;
	ll i, j, x, y, c;
	
	scanf("%lld", &n);
	
	for(i=0; i<n; i++){
		scanf("%lld%lld%lld", &x, &y, &c);
		P.emplace_back(x, y, c);
	}
	
	sort(P.begin(), P.end(), [&](point &pa, point &pb){
		if(pa.x != pb.x) return pa.x < pb.x;
		else return pa.y > pb.y;
	});
	
	for(i=0; i<n; i++){	
		K[i] = i;
		for(j=i+1; j<n; j++){
			V.emplace_back(i, j);
		}
	}
	
	sort(V.begin(), V.end(), [&](pll &va, pll &vb){
		return cross(va, vb) > 0;
	});
	
	for(i=0; i<n; i++){
		T[i + sz] = node(P[i].c);
	}
	
	for(i=sz-1; i; i--){
		T[i] = T[i << 1] + T[i << 1 | 1];
	}
	
	ans = get(0, n - 1);
	
	for(i=0; i<V.size(); i=j){
		X.clear();
		
		for(j=i; j<V.size() && cross(V[j], V[i]) == 0; j++){
			X.push_back(V[j].first); X.push_back(V[j].second);
			K[V[j].first] ++; K[V[j].second] --;
		}
		
		sort(X.begin(), X.end());
		X.erase(unique(X.begin(), X.end()), X.end());
		
		for(ll &x: X) insert(K[x], P[x].c);
		
		ans = max(ans, get(0, n - 1));
	}
	
	printf("%lld\n", ans);
	
	return 0;
}

Compilation message

bulldozer.cpp: In function 'll get(ll, ll)':
bulldozer.cpp:65:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   l = l + 1 >> 1;
       ~~^~~
bulldozer.cpp:66:9: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   r = r - 1 >> 1;
       ~~^~~
bulldozer.cpp: In function 'int main()':
bulldozer.cpp:110:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0; i<V.size(); i=j){
           ~^~~~~~~~~
bulldozer.cpp:113:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=i; j<V.size() && cross(V[j], V[i]) == 0; j++){
            ~^~~~~~~~~
bulldozer.cpp:77:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld", &n);
  ~~~~~^~~~~~~~~~~~
bulldozer.cpp:80:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%lld", &x, &y, &c);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	760 KB	Output is correct
2	Correct	3 ms	760 KB	Output is correct
3	Correct	3 ms	632 KB	Output is correct
4	Correct	3 ms	628 KB	Output is correct
5	Correct	3 ms	760 KB	Output is correct
6	Correct	3 ms	760 KB	Output is correct
7	Correct	3 ms	632 KB	Output is correct
8	Correct	3 ms	760 KB	Output is correct
9	Correct	3 ms	760 KB	Output is correct
10	Correct	3 ms	632 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

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	660 KB	Output is correct
2	Correct	4 ms	632 KB	Output is correct
3	Correct	4 ms	632 KB	Output is correct
4	Correct	4 ms	632 KB	Output is correct
5	Correct	4 ms	632 KB	Output is correct
6	Correct	4 ms	632 KB	Output is correct
7	Correct	4 ms	632 KB	Output is correct
8	Correct	4 ms	632 KB	Output is correct
9	Correct	4 ms	632 KB	Output is correct
10	Correct	4 ms	632 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	376 KB	Output is correct
20	Correct	2 ms	376 KB	Output is correct
21	Correct	4 ms	632 KB	Output is correct
22	Correct	4 ms	632 KB	Output is correct
23	Correct	4 ms	636 KB	Output is correct
24	Correct	4 ms	632 KB	Output is correct
25	Correct	4 ms	632 KB	Output is correct
26	Correct	4 ms	632 KB	Output is correct
27	Correct	4 ms	636 KB	Output is correct
28	Correct	4 ms	632 KB	Output is correct
29	Correct	4 ms	632 KB	Output is correct
30	Correct	4 ms	632 KB	Output is correct
31	Correct	4 ms	632 KB	Output is correct
32	Correct	4 ms	632 KB	Output is correct

Subtask #3
35.0 / 35.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	660 KB	Output is correct
2	Correct	4 ms	632 KB	Output is correct
3	Correct	4 ms	632 KB	Output is correct
4	Correct	4 ms	632 KB	Output is correct
5	Correct	4 ms	632 KB	Output is correct
6	Correct	4 ms	632 KB	Output is correct
7	Correct	4 ms	632 KB	Output is correct
8	Correct	4 ms	632 KB	Output is correct
9	Correct	4 ms	632 KB	Output is correct
10	Correct	4 ms	632 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	376 KB	Output is correct
20	Correct	2 ms	376 KB	Output is correct
21	Correct	4 ms	632 KB	Output is correct
22	Correct	4 ms	632 KB	Output is correct
23	Correct	4 ms	636 KB	Output is correct
24	Correct	4 ms	632 KB	Output is correct
25	Correct	4 ms	632 KB	Output is correct
26	Correct	4 ms	632 KB	Output is correct
27	Correct	4 ms	636 KB	Output is correct
28	Correct	4 ms	632 KB	Output is correct
29	Correct	4 ms	632 KB	Output is correct
30	Correct	4 ms	632 KB	Output is correct
31	Correct	4 ms	632 KB	Output is correct
32	Correct	4 ms	632 KB	Output is correct
33	Correct	1080 ms	33412 KB	Output is correct
34	Correct	1058 ms	33340 KB	Output is correct
35	Correct	1025 ms	33340 KB	Output is correct
36	Correct	1020 ms	33472 KB	Output is correct
37	Correct	1040 ms	33340 KB	Output is correct
38	Correct	1008 ms	33340 KB	Output is correct
39	Correct	1035 ms	33340 KB	Output is correct
40	Correct	1024 ms	33340 KB	Output is correct
41	Correct	1040 ms	33468 KB	Output is correct
42	Correct	1020 ms	33340 KB	Output is correct
43	Correct	1068 ms	33340 KB	Output is correct
44	Correct	1002 ms	33340 KB	Output is correct
45	Correct	1006 ms	33340 KB	Output is correct
46	Correct	1041 ms	33360 KB	Output is correct
47	Correct	1018 ms	33340 KB	Output is correct
48	Correct	1016 ms	33340 KB	Output is correct
49	Correct	1010 ms	33340 KB	Output is correct
50	Correct	1035 ms	33340 KB	Output is correct
51	Correct	1008 ms	33340 KB	Output is correct
52	Correct	1038 ms	33340 KB	Output is correct
53	Correct	1035 ms	33340 KB	Output is correct
54	Correct	1004 ms	33340 KB	Output is correct

Subtask #4
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	660 KB	Output is correct
2	Correct	4 ms	632 KB	Output is correct
3	Correct	4 ms	632 KB	Output is correct
4	Correct	4 ms	632 KB	Output is correct
5	Correct	4 ms	632 KB	Output is correct
6	Correct	4 ms	632 KB	Output is correct
7	Correct	4 ms	632 KB	Output is correct
8	Correct	4 ms	632 KB	Output is correct
9	Correct	4 ms	632 KB	Output is correct
10	Correct	4 ms	632 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	376 KB	Output is correct
20	Correct	2 ms	376 KB	Output is correct
21	Correct	4 ms	632 KB	Output is correct
22	Correct	4 ms	632 KB	Output is correct
23	Correct	4 ms	636 KB	Output is correct
24	Correct	4 ms	632 KB	Output is correct
25	Correct	4 ms	632 KB	Output is correct
26	Correct	4 ms	632 KB	Output is correct
27	Correct	4 ms	636 KB	Output is correct
28	Correct	4 ms	632 KB	Output is correct
29	Correct	4 ms	632 KB	Output is correct
30	Correct	4 ms	632 KB	Output is correct
31	Correct	4 ms	632 KB	Output is correct
32	Correct	4 ms	632 KB	Output is correct
33	Correct	1080 ms	33412 KB	Output is correct
34	Correct	1058 ms	33340 KB	Output is correct
35	Correct	1025 ms	33340 KB	Output is correct
36	Correct	1020 ms	33472 KB	Output is correct
37	Correct	1040 ms	33340 KB	Output is correct
38	Correct	1008 ms	33340 KB	Output is correct
39	Correct	1035 ms	33340 KB	Output is correct
40	Correct	1024 ms	33340 KB	Output is correct
41	Correct	1040 ms	33468 KB	Output is correct
42	Correct	1020 ms	33340 KB	Output is correct
43	Correct	1068 ms	33340 KB	Output is correct
44	Correct	1002 ms	33340 KB	Output is correct
45	Correct	1006 ms	33340 KB	Output is correct
46	Correct	1041 ms	33360 KB	Output is correct
47	Correct	1018 ms	33340 KB	Output is correct
48	Correct	1016 ms	33340 KB	Output is correct
49	Correct	1010 ms	33340 KB	Output is correct
50	Correct	1035 ms	33340 KB	Output is correct
51	Correct	1008 ms	33340 KB	Output is correct
52	Correct	1038 ms	33340 KB	Output is correct
53	Correct	1035 ms	33340 KB	Output is correct
54	Correct	1004 ms	33340 KB	Output is correct
55	Correct	1010 ms	33340 KB	Output is correct
56	Correct	1020 ms	33340 KB	Output is correct
57	Correct	1056 ms	33340 KB	Output is correct
58	Correct	1030 ms	33340 KB	Output is correct
59	Correct	1041 ms	33340 KB	Output is correct
60	Correct	1018 ms	33344 KB	Output is correct
61	Correct	1022 ms	33340 KB	Output is correct
62	Correct	1091 ms	33340 KB	Output is correct
63	Correct	1018 ms	33340 KB	Output is correct
64	Correct	1037 ms	33344 KB	Output is correct
65	Correct	1006 ms	33340 KB	Output is correct
66	Correct	1018 ms	33348 KB	Output is correct
67	Correct	1037 ms	33340 KB	Output is correct
68	Correct	1047 ms	33344 KB	Output is correct
69	Correct	1032 ms	33340 KB	Output is correct
70	Correct	1016 ms	33340 KB	Output is correct
71	Correct	1010 ms	33340 KB	Output is correct
72	Correct	1038 ms	33340 KB	Output is correct
73	Correct	1020 ms	33340 KB	Output is correct
74	Correct	1018 ms	33468 KB	Output is correct

Subtask #5
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	760 KB	Output is correct
2	Correct	3 ms	760 KB	Output is correct
3	Correct	3 ms	632 KB	Output is correct
4	Correct	3 ms	628 KB	Output is correct
5	Correct	3 ms	760 KB	Output is correct
6	Correct	3 ms	760 KB	Output is correct
7	Correct	3 ms	632 KB	Output is correct
8	Correct	3 ms	760 KB	Output is correct
9	Correct	3 ms	760 KB	Output is correct
10	Correct	3 ms	632 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	4 ms	660 KB	Output is correct
17	Correct	4 ms	632 KB	Output is correct
18	Correct	4 ms	632 KB	Output is correct
19	Correct	4 ms	632 KB	Output is correct
20	Correct	4 ms	632 KB	Output is correct
21	Correct	4 ms	632 KB	Output is correct
22	Correct	4 ms	632 KB	Output is correct
23	Correct	4 ms	632 KB	Output is correct
24	Correct	4 ms	632 KB	Output is correct
25	Correct	4 ms	632 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	2 ms	376 KB	Output is correct
32	Correct	2 ms	376 KB	Output is correct
33	Correct	2 ms	376 KB	Output is correct
34	Correct	2 ms	376 KB	Output is correct
35	Correct	2 ms	376 KB	Output is correct
36	Correct	4 ms	632 KB	Output is correct
37	Correct	4 ms	632 KB	Output is correct
38	Correct	4 ms	636 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	632 KB	Output is correct
42	Correct	4 ms	636 KB	Output is correct
43	Correct	4 ms	632 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	632 KB	Output is correct
48	Correct	1080 ms	33412 KB	Output is correct
49	Correct	1058 ms	33340 KB	Output is correct
50	Correct	1025 ms	33340 KB	Output is correct
51	Correct	1020 ms	33472 KB	Output is correct
52	Correct	1040 ms	33340 KB	Output is correct
53	Correct	1008 ms	33340 KB	Output is correct
54	Correct	1035 ms	33340 KB	Output is correct
55	Correct	1024 ms	33340 KB	Output is correct
56	Correct	1040 ms	33468 KB	Output is correct
57	Correct	1020 ms	33340 KB	Output is correct
58	Correct	1068 ms	33340 KB	Output is correct
59	Correct	1002 ms	33340 KB	Output is correct
60	Correct	1006 ms	33340 KB	Output is correct
61	Correct	1041 ms	33360 KB	Output is correct
62	Correct	1018 ms	33340 KB	Output is correct
63	Correct	1016 ms	33340 KB	Output is correct
64	Correct	1010 ms	33340 KB	Output is correct
65	Correct	1035 ms	33340 KB	Output is correct
66	Correct	1008 ms	33340 KB	Output is correct
67	Correct	1038 ms	33340 KB	Output is correct
68	Correct	1035 ms	33340 KB	Output is correct
69	Correct	1004 ms	33340 KB	Output is correct
70	Correct	1010 ms	33340 KB	Output is correct
71	Correct	1020 ms	33340 KB	Output is correct
72	Correct	1056 ms	33340 KB	Output is correct
73	Correct	1030 ms	33340 KB	Output is correct
74	Correct	1041 ms	33340 KB	Output is correct
75	Correct	1018 ms	33344 KB	Output is correct
76	Correct	1022 ms	33340 KB	Output is correct
77	Correct	1091 ms	33340 KB	Output is correct
78	Correct	1018 ms	33340 KB	Output is correct
79	Correct	1037 ms	33344 KB	Output is correct
80	Correct	1006 ms	33340 KB	Output is correct
81	Correct	1018 ms	33348 KB	Output is correct
82	Correct	1037 ms	33340 KB	Output is correct
83	Correct	1047 ms	33344 KB	Output is correct
84	Correct	1032 ms	33340 KB	Output is correct
85	Correct	1016 ms	33340 KB	Output is correct
86	Correct	1010 ms	33340 KB	Output is correct
87	Correct	1038 ms	33340 KB	Output is correct
88	Correct	1020 ms	33340 KB	Output is correct
89	Correct	1018 ms	33468 KB	Output is correct
90	Correct	1033 ms	33328 KB	Output is correct
91	Correct	1038 ms	33468 KB	Output is correct
92	Correct	1036 ms	33340 KB	Output is correct
93	Correct	1036 ms	33340 KB	Output is correct
94	Correct	1043 ms	33340 KB	Output is correct
95	Correct	1025 ms	33340 KB	Output is correct
96	Correct	1024 ms	33340 KB	Output is correct
97	Correct	1024 ms	33340 KB	Output is correct
98	Correct	1043 ms	33312 KB	Output is correct
99	Correct	1042 ms	33340 KB	Output is correct
100	Correct	703 ms	63996 KB	Output is correct
101	Correct	708 ms	63896 KB	Output is correct
102	Correct	699 ms	64088 KB	Output is correct
103	Correct	702 ms	64000 KB	Output is correct
104	Correct	697 ms	63860 KB	Output is correct
105	Correct	807 ms	58648 KB	Output is correct
106	Correct	780 ms	58776 KB	Output is correct
107	Correct	788 ms	58776 KB	Output is correct
108	Correct	788 ms	58708 KB	Output is correct
109	Correct	789 ms	58904 KB	Output is correct
110	Correct	851 ms	33340 KB	Output is correct
111	Correct	874 ms	33340 KB	Output is correct
112	Correct	866 ms	33340 KB	Output is correct
113	Correct	864 ms	33388 KB	Output is correct
114	Correct	859 ms	33324 KB	Output is correct
115	Correct	864 ms	33312 KB	Output is correct
116	Correct	863 ms	33292 KB	Output is correct
117	Correct	861 ms	33340 KB	Output is correct
118	Correct	870 ms	33344 KB	Output is correct
119	Correct	849 ms	33340 KB	Output is correct
120	Correct	2 ms	376 KB	Output is correct
121	Correct	2 ms	376 KB	Output is correct
122	Correct	1020 ms	33340 KB	Output is correct
123	Correct	1008 ms	33340 KB	Output is correct
124	Correct	1020 ms	33468 KB	Output is correct
125	Correct	1047 ms	33340 KB	Output is correct
126	Correct	1026 ms	33340 KB	Output is correct
127	Correct	1014 ms	33340 KB	Output is correct
128	Correct	1016 ms	33340 KB	Output is correct
129	Correct	1016 ms	33344 KB	Output is correct
130	Correct	1032 ms	33340 KB	Output is correct
131	Correct	1032 ms	33464 KB	Output is correct
132	Correct	1037 ms	33340 KB	Output is correct
133	Correct	1006 ms	33340 KB	Output is correct

답안 #122687

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 20.0 / 20.0

Subtask #3 35.0 / 35.0

Subtask #4 20.0 / 20.0

Subtask #5 20.0 / 20.0

Subtask #1
5.0 / 5.0

Subtask #2
20.0 / 20.0

Subtask #3
35.0 / 35.0

Subtask #4
20.0 / 20.0

Subtask #5
20.0 / 20.0