답안 #134590

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
134590	2019-07-23T04:56:47 Z	송준혁(#3242)	Telegraph (JOI16_telegraph)	C++14	10 / 100	5 ms	2708 KB

telegraph

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<int,int> pii;

int N;
LL ans, sum, S;
int P[101010], V[101010], chk[101010], C;
bool vis[101010];
vector<pii> adj[101010];

int FindCyc(int u){
	if (chk[u]) return chk[u];
	chk[u] = ++C, V[C] = u;
	FindCyc(P[u]);
}

void dfs(int u, int r){
	int Max = 0;
	vis[u] = true;
	for (pii v : adj[u]){
		if (v.first == r) continue;
		Max = max(Max, v.second);
		dfs(v.first, r);
	}
	S += Max;
}

int main(){
	scanf("%d", &N);
	for (int i=1; i<=N; i++){
		int x;
		scanf("%d %d", &P[i], &x);
		adj[P[i]].push_back(pii(i, x));
		sum += x;
	}
	for (int i=1; i<=N; i++){
		if (vis[i]) continue;
		C = 0, ans = 0, S = 0;
		int R = FindCyc(i);
		if (C == N){
			puts("0");
			return 0;
		}
		dfs(V[C], V[C]);
		ans = S, V[C+1] = V[R];
		for (C--; C>=R; C--){
			int pmax=0, nmax=0;
			for (pii v : adj[V[C+1]]){
				if (v.first != V[C]) nmax = max(nmax, v.second);
				pmax = max(pmax, v.second);
			}
			S += nmax - pmax, pmax = nmax = 0;

			for (pii v : adj[V[C+2]]){
				if (v.first != V[C+1]) pmax = max(pmax, v.second);
				nmax = max(nmax, v.second);
			}
			S += nmax - pmax;
			ans = max(ans, S);
		}
		sum -= ans;
	}
	printf("%lld\n", sum);
	return 0;
}
/*
6
2 3
5 7
2 2
3 4
4 1
4 6
*/

Compilation message

telegraph.cpp: In function 'int FindCyc(int)':
telegraph.cpp:16:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
telegraph.cpp: In function 'int main()':
telegraph.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
telegraph.cpp:33:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &P[i], &x);
   ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2680 KB	Output is correct
2	Correct	4 ms	2680 KB	Output is correct
3	Correct	4 ms	2680 KB	Output is correct
4	Correct	4 ms	2680 KB	Output is correct
5	Correct	4 ms	2680 KB	Output is correct
6	Correct	4 ms	2680 KB	Output is correct
7	Correct	4 ms	2684 KB	Output is correct
8	Correct	4 ms	2680 KB	Output is correct
9	Correct	4 ms	2680 KB	Output is correct
10	Correct	4 ms	2680 KB	Output is correct
11	Correct	4 ms	2680 KB	Output is correct
12	Correct	5 ms	2684 KB	Output is correct
13	Correct	5 ms	2684 KB	Output is correct
14	Correct	4 ms	2680 KB	Output is correct
15	Correct	4 ms	2680 KB	Output is correct
16	Correct	4 ms	2680 KB	Output is correct
17	Correct	4 ms	2680 KB	Output is correct
18	Correct	4 ms	2680 KB	Output is correct
19	Correct	5 ms	2680 KB	Output is correct
20	Correct	4 ms	2680 KB	Output is correct
21	Correct	5 ms	2680 KB	Output is correct
22	Correct	4 ms	2680 KB	Output is correct
23	Correct	4 ms	2680 KB	Output is correct
24	Correct	4 ms	2700 KB	Output is correct
25	Correct	4 ms	2680 KB	Output is correct
26	Correct	4 ms	2680 KB	Output is correct
27	Correct	4 ms	2680 KB	Output is correct
28	Correct	4 ms	2680 KB	Output is correct
29	Correct	4 ms	2680 KB	Output is correct
30	Correct	4 ms	2680 KB	Output is correct
31	Correct	4 ms	2680 KB	Output is correct
32	Correct	4 ms	2680 KB	Output is correct
33	Correct	4 ms	2680 KB	Output is correct
34	Correct	4 ms	2680 KB	Output is correct
35	Correct	4 ms	2680 KB	Output is correct
36	Correct	4 ms	2684 KB	Output is correct
37	Correct	4 ms	2680 KB	Output is correct
38	Correct	4 ms	2680 KB	Output is correct
39	Correct	4 ms	2680 KB	Output is correct
40	Correct	4 ms	2680 KB	Output is correct
41	Correct	4 ms	2680 KB	Output is correct
42	Correct	4 ms	2680 KB	Output is correct
43	Correct	4 ms	2680 KB	Output is correct
44	Correct	4 ms	2680 KB	Output is correct
45	Correct	4 ms	2680 KB	Output is correct
46	Correct	4 ms	2684 KB	Output is correct
47	Correct	4 ms	2680 KB	Output is correct
48	Correct	4 ms	2680 KB	Output is correct

Subtask #2
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2680 KB	Output is correct
2	Correct	4 ms	2680 KB	Output is correct
3	Correct	4 ms	2680 KB	Output is correct
4	Correct	4 ms	2680 KB	Output is correct
5	Correct	4 ms	2680 KB	Output is correct
6	Correct	4 ms	2680 KB	Output is correct
7	Correct	4 ms	2684 KB	Output is correct
8	Correct	4 ms	2680 KB	Output is correct
9	Correct	4 ms	2680 KB	Output is correct
10	Correct	4 ms	2680 KB	Output is correct
11	Correct	4 ms	2680 KB	Output is correct
12	Correct	5 ms	2684 KB	Output is correct
13	Correct	5 ms	2684 KB	Output is correct
14	Correct	4 ms	2680 KB	Output is correct
15	Correct	4 ms	2680 KB	Output is correct
16	Correct	4 ms	2680 KB	Output is correct
17	Correct	4 ms	2680 KB	Output is correct
18	Correct	4 ms	2680 KB	Output is correct
19	Correct	5 ms	2680 KB	Output is correct
20	Correct	4 ms	2680 KB	Output is correct
21	Correct	5 ms	2680 KB	Output is correct
22	Correct	4 ms	2680 KB	Output is correct
23	Correct	4 ms	2680 KB	Output is correct
24	Correct	4 ms	2700 KB	Output is correct
25	Correct	4 ms	2680 KB	Output is correct
26	Correct	4 ms	2680 KB	Output is correct
27	Correct	4 ms	2680 KB	Output is correct
28	Correct	4 ms	2680 KB	Output is correct
29	Correct	4 ms	2680 KB	Output is correct
30	Correct	4 ms	2680 KB	Output is correct
31	Correct	4 ms	2680 KB	Output is correct
32	Correct	4 ms	2680 KB	Output is correct
33	Correct	4 ms	2680 KB	Output is correct
34	Correct	4 ms	2680 KB	Output is correct
35	Correct	4 ms	2680 KB	Output is correct
36	Correct	4 ms	2684 KB	Output is correct
37	Correct	4 ms	2680 KB	Output is correct
38	Correct	4 ms	2680 KB	Output is correct
39	Correct	4 ms	2680 KB	Output is correct
40	Correct	4 ms	2680 KB	Output is correct
41	Correct	4 ms	2680 KB	Output is correct
42	Correct	4 ms	2680 KB	Output is correct
43	Correct	4 ms	2680 KB	Output is correct
44	Correct	4 ms	2680 KB	Output is correct
45	Correct	4 ms	2680 KB	Output is correct
46	Correct	4 ms	2684 KB	Output is correct
47	Correct	4 ms	2680 KB	Output is correct
48	Correct	4 ms	2680 KB	Output is correct
49	Correct	4 ms	2680 KB	Output is correct
50	Correct	4 ms	2680 KB	Output is correct
51	Correct	4 ms	2708 KB	Output is correct
52	Correct	4 ms	2680 KB	Output is correct
53	Correct	4 ms	2684 KB	Output is correct
54	Correct	4 ms	2680 KB	Output is correct
55	Correct	4 ms	2680 KB	Output is correct
56	Correct	4 ms	2680 KB	Output is correct
57	Correct	4 ms	2680 KB	Output is correct
58	Correct	4 ms	2680 KB	Output is correct
59	Correct	4 ms	2680 KB	Output is correct
60	Correct	4 ms	2680 KB	Output is correct
61	Correct	4 ms	2680 KB	Output is correct
62	Correct	4 ms	2680 KB	Output is correct
63	Correct	4 ms	2680 KB	Output is correct
64	Correct	5 ms	2680 KB	Output is correct
65	Correct	5 ms	2684 KB	Output is correct
66	Correct	4 ms	2680 KB	Output is correct
67	Correct	4 ms	2680 KB	Output is correct
68	Correct	4 ms	2680 KB	Output is correct
69	Correct	4 ms	2680 KB	Output is correct
70	Correct	4 ms	2680 KB	Output is correct
71	Correct	5 ms	2680 KB	Output is correct
72	Correct	4 ms	2680 KB	Output is correct
73	Correct	4 ms	2680 KB	Output is correct
74	Correct	4 ms	2680 KB	Output is correct
75	Correct	4 ms	2680 KB	Output is correct
76	Correct	4 ms	2680 KB	Output is correct
77	Correct	4 ms	2680 KB	Output is correct
78	Correct	5 ms	2680 KB	Output is correct
79	Correct	4 ms	2680 KB	Output is correct
80	Correct	4 ms	2680 KB	Output is correct
81	Correct	5 ms	2680 KB	Output is correct
82	Correct	4 ms	2680 KB	Output is correct
83	Incorrect	5 ms	2680 KB	Output isn't correct
84	Halted	0 ms	0 KB	-

Subtask #3
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2680 KB	Output is correct
2	Correct	4 ms	2680 KB	Output is correct
3	Correct	4 ms	2680 KB	Output is correct
4	Correct	4 ms	2680 KB	Output is correct
5	Correct	4 ms	2680 KB	Output is correct
6	Correct	4 ms	2680 KB	Output is correct
7	Correct	4 ms	2684 KB	Output is correct
8	Correct	4 ms	2680 KB	Output is correct
9	Correct	4 ms	2680 KB	Output is correct
10	Correct	4 ms	2680 KB	Output is correct
11	Correct	4 ms	2680 KB	Output is correct
12	Correct	5 ms	2684 KB	Output is correct
13	Correct	5 ms	2684 KB	Output is correct
14	Correct	4 ms	2680 KB	Output is correct
15	Correct	4 ms	2680 KB	Output is correct
16	Correct	4 ms	2680 KB	Output is correct
17	Correct	4 ms	2680 KB	Output is correct
18	Correct	4 ms	2680 KB	Output is correct
19	Correct	5 ms	2680 KB	Output is correct
20	Correct	4 ms	2680 KB	Output is correct
21	Correct	5 ms	2680 KB	Output is correct
22	Correct	4 ms	2680 KB	Output is correct
23	Correct	4 ms	2680 KB	Output is correct
24	Correct	4 ms	2700 KB	Output is correct
25	Correct	4 ms	2680 KB	Output is correct
26	Correct	4 ms	2680 KB	Output is correct
27	Correct	4 ms	2680 KB	Output is correct
28	Correct	4 ms	2680 KB	Output is correct
29	Correct	4 ms	2680 KB	Output is correct
30	Correct	4 ms	2680 KB	Output is correct
31	Correct	4 ms	2680 KB	Output is correct
32	Correct	4 ms	2680 KB	Output is correct
33	Correct	4 ms	2680 KB	Output is correct
34	Correct	4 ms	2680 KB	Output is correct
35	Correct	4 ms	2680 KB	Output is correct
36	Correct	4 ms	2684 KB	Output is correct
37	Correct	4 ms	2680 KB	Output is correct
38	Correct	4 ms	2680 KB	Output is correct
39	Correct	4 ms	2680 KB	Output is correct
40	Correct	4 ms	2680 KB	Output is correct
41	Correct	4 ms	2680 KB	Output is correct
42	Correct	4 ms	2680 KB	Output is correct
43	Correct	4 ms	2680 KB	Output is correct
44	Correct	4 ms	2680 KB	Output is correct
45	Correct	4 ms	2680 KB	Output is correct
46	Correct	4 ms	2684 KB	Output is correct
47	Correct	4 ms	2680 KB	Output is correct
48	Correct	4 ms	2680 KB	Output is correct
49	Correct	4 ms	2680 KB	Output is correct
50	Correct	4 ms	2680 KB	Output is correct
51	Correct	4 ms	2708 KB	Output is correct
52	Correct	4 ms	2680 KB	Output is correct
53	Correct	4 ms	2684 KB	Output is correct
54	Correct	4 ms	2680 KB	Output is correct
55	Correct	4 ms	2680 KB	Output is correct
56	Correct	4 ms	2680 KB	Output is correct
57	Correct	4 ms	2680 KB	Output is correct
58	Correct	4 ms	2680 KB	Output is correct
59	Correct	4 ms	2680 KB	Output is correct
60	Correct	4 ms	2680 KB	Output is correct
61	Correct	4 ms	2680 KB	Output is correct
62	Correct	4 ms	2680 KB	Output is correct
63	Correct	4 ms	2680 KB	Output is correct
64	Correct	5 ms	2680 KB	Output is correct
65	Correct	5 ms	2684 KB	Output is correct
66	Correct	4 ms	2680 KB	Output is correct
67	Correct	4 ms	2680 KB	Output is correct
68	Correct	4 ms	2680 KB	Output is correct
69	Correct	4 ms	2680 KB	Output is correct
70	Correct	4 ms	2680 KB	Output is correct
71	Correct	5 ms	2680 KB	Output is correct
72	Correct	4 ms	2680 KB	Output is correct
73	Correct	4 ms	2680 KB	Output is correct
74	Correct	4 ms	2680 KB	Output is correct
75	Correct	4 ms	2680 KB	Output is correct
76	Correct	4 ms	2680 KB	Output is correct
77	Correct	4 ms	2680 KB	Output is correct
78	Correct	5 ms	2680 KB	Output is correct
79	Correct	4 ms	2680 KB	Output is correct
80	Correct	4 ms	2680 KB	Output is correct
81	Correct	5 ms	2680 KB	Output is correct
82	Correct	4 ms	2680 KB	Output is correct
83	Incorrect	5 ms	2680 KB	Output isn't correct
84	Halted	0 ms	0 KB	-

Subtask #4
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2680 KB	Output is correct
2	Correct	4 ms	2680 KB	Output is correct
3	Correct	4 ms	2680 KB	Output is correct
4	Correct	4 ms	2680 KB	Output is correct
5	Correct	4 ms	2680 KB	Output is correct
6	Correct	4 ms	2680 KB	Output is correct
7	Correct	4 ms	2684 KB	Output is correct
8	Correct	4 ms	2680 KB	Output is correct
9	Correct	4 ms	2680 KB	Output is correct
10	Correct	4 ms	2680 KB	Output is correct
11	Correct	4 ms	2680 KB	Output is correct
12	Correct	5 ms	2684 KB	Output is correct
13	Correct	5 ms	2684 KB	Output is correct
14	Correct	4 ms	2680 KB	Output is correct
15	Correct	4 ms	2680 KB	Output is correct
16	Correct	4 ms	2680 KB	Output is correct
17	Correct	4 ms	2680 KB	Output is correct
18	Correct	4 ms	2680 KB	Output is correct
19	Correct	5 ms	2680 KB	Output is correct
20	Correct	4 ms	2680 KB	Output is correct
21	Correct	5 ms	2680 KB	Output is correct
22	Correct	4 ms	2680 KB	Output is correct
23	Correct	4 ms	2680 KB	Output is correct
24	Correct	4 ms	2700 KB	Output is correct
25	Correct	4 ms	2680 KB	Output is correct
26	Correct	4 ms	2680 KB	Output is correct
27	Correct	4 ms	2680 KB	Output is correct
28	Correct	4 ms	2680 KB	Output is correct
29	Correct	4 ms	2680 KB	Output is correct
30	Correct	4 ms	2680 KB	Output is correct
31	Correct	4 ms	2680 KB	Output is correct
32	Correct	4 ms	2680 KB	Output is correct
33	Correct	4 ms	2680 KB	Output is correct
34	Correct	4 ms	2680 KB	Output is correct
35	Correct	4 ms	2680 KB	Output is correct
36	Correct	4 ms	2684 KB	Output is correct
37	Correct	4 ms	2680 KB	Output is correct
38	Correct	4 ms	2680 KB	Output is correct
39	Correct	4 ms	2680 KB	Output is correct
40	Correct	4 ms	2680 KB	Output is correct
41	Correct	4 ms	2680 KB	Output is correct
42	Correct	4 ms	2680 KB	Output is correct
43	Correct	4 ms	2680 KB	Output is correct
44	Correct	4 ms	2680 KB	Output is correct
45	Correct	4 ms	2680 KB	Output is correct
46	Correct	4 ms	2684 KB	Output is correct
47	Correct	4 ms	2680 KB	Output is correct
48	Correct	4 ms	2680 KB	Output is correct
49	Correct	4 ms	2680 KB	Output is correct
50	Correct	4 ms	2680 KB	Output is correct
51	Correct	4 ms	2708 KB	Output is correct
52	Correct	4 ms	2680 KB	Output is correct
53	Correct	4 ms	2684 KB	Output is correct
54	Correct	4 ms	2680 KB	Output is correct
55	Correct	4 ms	2680 KB	Output is correct
56	Correct	4 ms	2680 KB	Output is correct
57	Correct	4 ms	2680 KB	Output is correct
58	Correct	4 ms	2680 KB	Output is correct
59	Correct	4 ms	2680 KB	Output is correct
60	Correct	4 ms	2680 KB	Output is correct
61	Correct	4 ms	2680 KB	Output is correct
62	Correct	4 ms	2680 KB	Output is correct
63	Correct	4 ms	2680 KB	Output is correct
64	Correct	5 ms	2680 KB	Output is correct
65	Correct	5 ms	2684 KB	Output is correct
66	Correct	4 ms	2680 KB	Output is correct
67	Correct	4 ms	2680 KB	Output is correct
68	Correct	4 ms	2680 KB	Output is correct
69	Correct	4 ms	2680 KB	Output is correct
70	Correct	4 ms	2680 KB	Output is correct
71	Correct	5 ms	2680 KB	Output is correct
72	Correct	4 ms	2680 KB	Output is correct
73	Correct	4 ms	2680 KB	Output is correct
74	Correct	4 ms	2680 KB	Output is correct
75	Correct	4 ms	2680 KB	Output is correct
76	Correct	4 ms	2680 KB	Output is correct
77	Correct	4 ms	2680 KB	Output is correct
78	Correct	5 ms	2680 KB	Output is correct
79	Correct	4 ms	2680 KB	Output is correct
80	Correct	4 ms	2680 KB	Output is correct
81	Correct	5 ms	2680 KB	Output is correct
82	Correct	4 ms	2680 KB	Output is correct
83	Incorrect	5 ms	2680 KB	Output isn't correct
84	Halted	0 ms	0 KB	-

답안 #134590

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 0 / 30.0

Subtask #3 0 / 30.0

Subtask #4 0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
0 / 30.0

Subtask #3
0 / 30.0

Subtask #4
0 / 30.0