Submission #63170

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
63170	2018-08-01T02:34:57 Z	kjp4155	None (KOI18_robot)	C++17	100 / 100	171 ms	11644 KB

robot

#include <stdio.h>
#include <algorithm>
#include <utility>
#include <vector>
using namespace std;

int N,A,B;
vector<pair<int,int>> E[100500];

// dist는 루트로부터 해당 정점까지 거리를 저장하는 배열
// mx는 루트로부터 해당 정점까지 경로상 가장 긴 통로의 길이를 저장하는 배열
int dist[100500], mx[100500];
bool vis[100500];
void dfs(int node, int d, int m){
	dist[node] = d;
	mx[node] = m;
	vis[node] = true;
	for(pair<int,int> e : E[node]){
		if( !vis[e.first] ) dfs(e.first, d + e.second, max(m, e.second) );
	}
}


int main(){
	scanf("%d%d%d",&N,&A,&B);
	for(int i=1;i<=N-1;i++){
		int x,y,z; scanf("%d%d%d",&x,&y,&z);
		E[x].push_back(make_pair(y,z));
		E[y].push_back(make_pair(x,z));
	}

	dfs(A,0,0);

	printf("%d\n",dist[B]-mx[B]);
}

Compilation message

robot.cpp: In function 'int main()':
robot.cpp:25:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&N,&A,&B);
  ~~~~~^~~~~~~~~~~~~~~~~~~
robot.cpp:27:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int x,y,z; scanf("%d%d%d",&x,&y,&z);
              ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
17.0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	59 ms	11384 KB	Output is correct
2	Correct	74 ms	11384 KB	Output is correct
3	Correct	58 ms	11384 KB	Output is correct
4	Correct	5 ms	11384 KB	Output is correct
5	Correct	11 ms	11384 KB	Output is correct
6	Correct	17 ms	11384 KB	Output is correct
7	Correct	5 ms	11384 KB	Output is correct
8	Correct	16 ms	11384 KB	Output is correct
9	Correct	6 ms	11384 KB	Output is correct
10	Correct	19 ms	11384 KB	Output is correct
11	Correct	5 ms	11384 KB	Output is correct
12	Correct	5 ms	11384 KB	Output is correct
13	Correct	28 ms	11384 KB	Output is correct
14	Correct	28 ms	11384 KB	Output is correct
15	Correct	8 ms	11384 KB	Output is correct
16	Correct	43 ms	11384 KB	Output is correct
17	Correct	38 ms	11384 KB	Output is correct
18	Correct	43 ms	11384 KB	Output is correct
19	Correct	8 ms	11384 KB	Output is correct
20	Correct	49 ms	11384 KB	Output is correct
21	Correct	58 ms	11384 KB	Output is correct
22	Correct	82 ms	11384 KB	Output is correct
23	Correct	10 ms	11384 KB	Output is correct
24	Correct	55 ms	11384 KB	Output is correct

Subtask #2
19.0 / 19.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	137 ms	11384 KB	Output is correct
2	Correct	61 ms	11384 KB	Output is correct
3	Correct	5 ms	11384 KB	Output is correct
4	Correct	8 ms	11384 KB	Output is correct
5	Correct	18 ms	11384 KB	Output is correct
6	Correct	14 ms	11384 KB	Output is correct
7	Correct	6 ms	11384 KB	Output is correct
8	Correct	20 ms	11384 KB	Output is correct
9	Correct	29 ms	11384 KB	Output is correct
10	Correct	5 ms	11384 KB	Output is correct
11	Correct	37 ms	11384 KB	Output is correct
12	Correct	47 ms	11384 KB	Output is correct
13	Correct	8 ms	11384 KB	Output is correct
14	Correct	7 ms	11384 KB	Output is correct
15	Correct	71 ms	11384 KB	Output is correct
16	Correct	46 ms	11384 KB	Output is correct
17	Correct	52 ms	11384 KB	Output is correct
18	Correct	76 ms	11384 KB	Output is correct
19	Correct	57 ms	11384 KB	Output is correct
20	Correct	107 ms	11384 KB	Output is correct
21	Correct	10 ms	11384 KB	Output is correct
22	Correct	11 ms	11384 KB	Output is correct

Subtask #3
23.0 / 23.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	11384 KB	Output is correct
2	Correct	5 ms	11384 KB	Output is correct
3	Correct	8 ms	11384 KB	Output is correct
4	Correct	4 ms	11384 KB	Output is correct
5	Correct	6 ms	11384 KB	Output is correct
6	Correct	7 ms	11384 KB	Output is correct
7	Correct	7 ms	11384 KB	Output is correct
8	Correct	6 ms	11384 KB	Output is correct
9	Correct	5 ms	11384 KB	Output is correct
10	Correct	8 ms	11384 KB	Output is correct
11	Correct	6 ms	11384 KB	Output is correct
12	Correct	9 ms	11384 KB	Output is correct
13	Correct	8 ms	11384 KB	Output is correct
14	Correct	8 ms	11384 KB	Output is correct
15	Correct	7 ms	11384 KB	Output is correct
16	Correct	7 ms	11384 KB	Output is correct

Subtask #4
41.0 / 41.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	171 ms	11384 KB	Output is correct
2	Correct	133 ms	11384 KB	Output is correct
3	Correct	68 ms	11608 KB	Output is correct
4	Correct	71 ms	11608 KB	Output is correct
5	Correct	65 ms	11608 KB	Output is correct
6	Correct	148 ms	11644 KB	Output is correct
7	Correct	4 ms	11644 KB	Output is correct
8	Correct	7 ms	11644 KB	Output is correct
9	Correct	7 ms	11644 KB	Output is correct
10	Correct	14 ms	11644 KB	Output is correct
11	Correct	8 ms	11644 KB	Output is correct
12	Correct	16 ms	11644 KB	Output is correct
13	Correct	26 ms	11644 KB	Output is correct
14	Correct	20 ms	11644 KB	Output is correct
15	Correct	5 ms	11644 KB	Output is correct
16	Correct	8 ms	11644 KB	Output is correct
17	Correct	18 ms	11644 KB	Output is correct
18	Correct	6 ms	11644 KB	Output is correct
19	Correct	18 ms	11644 KB	Output is correct
20	Correct	23 ms	11644 KB	Output is correct
21	Correct	18 ms	11644 KB	Output is correct
22	Correct	7 ms	11644 KB	Output is correct
23	Correct	4 ms	11644 KB	Output is correct
24	Correct	5 ms	11644 KB	Output is correct
25	Correct	7 ms	11644 KB	Output is correct
26	Correct	23 ms	11644 KB	Output is correct
27	Correct	6 ms	11644 KB	Output is correct
28	Correct	24 ms	11644 KB	Output is correct
29	Correct	40 ms	11644 KB	Output is correct
30	Correct	42 ms	11644 KB	Output is correct
31	Correct	7 ms	11644 KB	Output is correct
32	Correct	8 ms	11644 KB	Output is correct
33	Correct	8 ms	11644 KB	Output is correct
34	Correct	46 ms	11644 KB	Output is correct
35	Correct	9 ms	11644 KB	Output is correct
36	Correct	61 ms	11644 KB	Output is correct
37	Correct	48 ms	11644 KB	Output is correct
38	Correct	36 ms	11644 KB	Output is correct
39	Correct	8 ms	11644 KB	Output is correct
40	Correct	5 ms	11644 KB	Output is correct
41	Correct	36 ms	11644 KB	Output is correct
42	Correct	9 ms	11644 KB	Output is correct
43	Correct	42 ms	11644 KB	Output is correct
44	Correct	46 ms	11644 KB	Output is correct
45	Correct	44 ms	11644 KB	Output is correct
46	Correct	48 ms	11644 KB	Output is correct
47	Correct	53 ms	11644 KB	Output is correct
48	Correct	104 ms	11644 KB	Output is correct
49	Correct	102 ms	11644 KB	Output is correct
50	Correct	11 ms	11644 KB	Output is correct
51	Correct	11 ms	11644 KB	Output is correct
52	Correct	13 ms	11644 KB	Output is correct
53	Correct	57 ms	11644 KB	Output is correct

Submission #63170

Compilation message

Subtask #1 17.0 / 17.0

Subtask #2 19.0 / 19.0

Subtask #3 23.0 / 23.0

Subtask #4 41.0 / 41.0

Subtask #1
17.0 / 17.0

Subtask #2
19.0 / 19.0

Subtask #3
23.0 / 23.0

Subtask #4
41.0 / 41.0