Submission #140586

# Submission time Handle Problem Language Result Execution time Memory
140586 2019-08-03T15:58:36 Z khrbuddy03 None (KOI18_robot) C++14
100 / 100
395 ms 25592 KB
#include <bits/stdc++.h>

using namespace std;

const int inf = 1e5 + 9;
vector<pair<int, int>> tree[inf];
map<pair<int, int>, int> m;
int dist[inf];
int par[inf];
bool vis[inf];

void dfss(int here, int len) {
	dist[here] = len;
	for (auto i : tree[here]) {
		int there = i.first;
		int nlen = len + i.second;
		if (dist[there] == -1) dfss(there, nlen);
	}
}

void dfsm(int here) {
	vis[here] = true;
	for (auto i : tree[here]) {
		if (vis[i.first]) continue;
		dfsm(i.first);
		par[i.first] = here;
	}
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n, x, y; cin >> n >> x >> y;
	for (int i = 0; i < n - 1; i++) {
		int a, b, c; cin >> a >> b >> c;
		tree[a].emplace_back(b, c);
		tree[b].emplace_back(a, c);
		m[make_pair(a, b)] = c;
		m[make_pair(b, a)] = c;
	}
	fill(&dist[1], &dist[n + 1], -1);
	dfss(x, 0);
	dfsm(x);
	int here = y;
	int mpath = 0;
	while (here != x) {
		mpath = max(mpath, m[make_pair(here, par[here])]);
		here = par[here];
	}
	cout << dist[y] - mpath << '\n';
	
}

# Verdict Execution time Memory Grader output
1 Correct 154 ms 25592 KB Output is correct
2 Correct 133 ms 24396 KB Output is correct
3 Correct 136 ms 22944 KB Output is correct
4 Correct 5 ms 2936 KB Output is correct
5 Correct 17 ms 5368 KB Output is correct
6 Correct 20 ms 5880 KB Output is correct
7 Correct 4 ms 2684 KB Output is correct
8 Correct 26 ms 7160 KB Output is correct
9 Correct 6 ms 3192 KB Output is correct
10 Correct 32 ms 7800 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 39 ms 9464 KB Output is correct
14 Correct 44 ms 10616 KB Output is correct
15 Correct 7 ms 3448 KB Output is correct
16 Correct 54 ms 11768 KB Output is correct
17 Correct 68 ms 13148 KB Output is correct
18 Correct 72 ms 14328 KB Output is correct
19 Correct 10 ms 4160 KB Output is correct
20 Correct 79 ms 15864 KB Output is correct
21 Correct 97 ms 17592 KB Output is correct
22 Correct 113 ms 20728 KB Output is correct
23 Correct 13 ms 4484 KB Output is correct
24 Correct 120 ms 21440 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 300 ms 21872 KB Output is correct
2 Correct 129 ms 22892 KB Output is correct
3 Correct 5 ms 2936 KB Output is correct
4 Correct 5 ms 2936 KB Output is correct
5 Correct 29 ms 5752 KB Output is correct
6 Correct 20 ms 5880 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 32 ms 7788 KB Output is correct
9 Correct 40 ms 7440 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 45 ms 10616 KB Output is correct
12 Correct 70 ms 9304 KB Output is correct
13 Correct 8 ms 3416 KB Output is correct
14 Correct 8 ms 3448 KB Output is correct
15 Correct 99 ms 12024 KB Output is correct
16 Correct 63 ms 13176 KB Output is correct
17 Correct 83 ms 15964 KB Output is correct
18 Correct 121 ms 14708 KB Output is correct
19 Correct 113 ms 20728 KB Output is correct
20 Correct 222 ms 17656 KB Output is correct
21 Correct 13 ms 4600 KB Output is correct
22 Correct 16 ms 4344 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 5 ms 2940 KB Output is correct
2 Correct 5 ms 2812 KB Output is correct
3 Correct 6 ms 2936 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 6 ms 3064 KB Output is correct
6 Correct 6 ms 3192 KB Output is correct
7 Correct 7 ms 3192 KB Output is correct
8 Correct 4 ms 2808 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 8 ms 3320 KB Output is correct
11 Correct 9 ms 3448 KB Output is correct
12 Correct 8 ms 3452 KB Output is correct
13 Correct 8 ms 3448 KB Output is correct
14 Correct 10 ms 3576 KB Output is correct
15 Correct 10 ms 3704 KB Output is correct
16 Correct 5 ms 2808 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 304 ms 22032 KB Output is correct
2 Correct 307 ms 21948 KB Output is correct
3 Correct 155 ms 25464 KB Output is correct
4 Correct 136 ms 24484 KB Output is correct
5 Correct 156 ms 22904 KB Output is correct
6 Correct 395 ms 25464 KB Output is correct
7 Correct 5 ms 2936 KB Output is correct
8 Correct 5 ms 2936 KB Output is correct
9 Correct 5 ms 2808 KB Output is correct
10 Correct 17 ms 5368 KB Output is correct
11 Correct 6 ms 2936 KB Output is correct
12 Correct 30 ms 5752 KB Output is correct
13 Correct 29 ms 5748 KB Output is correct
14 Correct 20 ms 5880 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Correct 7 ms 3068 KB Output is correct
17 Correct 27 ms 7196 KB Output is correct
18 Correct 7 ms 3192 KB Output is correct
19 Correct 31 ms 7768 KB Output is correct
20 Correct 39 ms 7412 KB Output is correct
21 Correct 39 ms 7284 KB Output is correct
22 Correct 7 ms 3064 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 8 ms 3192 KB Output is correct
26 Correct 39 ms 9464 KB Output is correct
27 Correct 9 ms 3320 KB Output is correct
28 Correct 46 ms 10588 KB Output is correct
29 Correct 78 ms 9336 KB Output is correct
30 Correct 71 ms 9336 KB Output is correct
31 Correct 8 ms 3448 KB Output is correct
32 Correct 8 ms 3448 KB Output is correct
33 Correct 9 ms 3448 KB Output is correct
34 Correct 53 ms 11612 KB Output is correct
35 Correct 10 ms 3576 KB Output is correct
36 Correct 113 ms 12236 KB Output is correct
37 Correct 121 ms 11988 KB Output is correct
38 Correct 67 ms 13180 KB Output is correct
39 Correct 11 ms 3704 KB Output is correct
40 Correct 5 ms 2808 KB Output is correct
41 Correct 73 ms 14328 KB Output is correct
42 Correct 10 ms 4088 KB Output is correct
43 Correct 79 ms 15864 KB Output is correct
44 Correct 118 ms 14836 KB Output is correct
45 Correct 134 ms 14704 KB Output is correct
46 Correct 99 ms 17556 KB Output is correct
47 Correct 112 ms 20604 KB Output is correct
48 Correct 219 ms 17912 KB Output is correct
49 Correct 212 ms 17680 KB Output is correct
50 Correct 14 ms 4548 KB Output is correct
51 Correct 17 ms 4344 KB Output is correct
52 Correct 17 ms 4344 KB Output is correct
53 Correct 121 ms 21368 KB Output is correct