Submission #134590

# Submission time Handle Problem Language Result Execution time Memory
134590 2019-07-23T04:56:47 Z 송준혁(#3242) Telegraph (JOI16_telegraph) C++14
10 / 100
5 ms 2708 KB
#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);
   ~~~~~^~~~~~~~~~~~~~~~~~~~
# Verdict Execution time Memory 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
# Verdict Execution time Memory 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 -
# Verdict Execution time Memory 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 -
# Verdict Execution time Memory 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 -