oj.uz

답안 #742239

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
742239 2023-05-16T00:05:07 Z beaboss 경주 (Race) (IOI11_race) C++14
100 / 100
 493 ms 107516 KB 
// #include <bits/stdc++.h>

// using namespace std;

// #define s second
// #define f first
// #define pb push_back

// typedef long long ll;

// typedef pair<ll, ll> pii;
// typedef vector<pii> vpii;

// typedef vector<ll> vi;

// #define FOR(i, a, b) for (ll i = (a); i<b; i++)

// const ll MN = 3e5 + 10;

// vpii adj[MN];
// ll d[MN]; // from root in highways
// ll d2[MN]; // from root in distance
// ll k;
// map<ll, ll> small[MN];
// void dfs(ll cur = 0, ll dist = 0, ll dist2 = 0, ll p = -1) {
//   // cout << cur << endl;
//   d[cur]=dist;
//   d2[cur]=dist2;

//   small[cur][dist2]=dist;

//   for (auto val: adj[cur]) {
//     if (val.f != p) {
//       dfs(val.f, dist + 1ll, dist2 + val.s, cur);
//     }
//   }
// }



// ll ans = 1e9;

// void solve(ll cur, ll p=-1) {
//   ll target = k + 2*d2[cur];
//   for (auto val: adj[cur]) {
//     if (val.f != p) {
//       solve(val.f, cur);

//       if (small[val.f].size() > small[cur].size()) swap(small[val.f], small[cur]);

//       for (pii nx: small[val.f]) {
//         if (small[cur].find(target - nx.f) != small[cur].end()) {
//           ans = min(ans, small[cur][target - nx.f] + nx.s - 2*d[cur]);
//         }
//       }

//       for (pii nx: small[val.f]) {
//         if (small[cur].find(nx.f) == small[cur].end()) small[cur].insert(nx);
//         else small[cur][nx.f]=min(small[cur][nx.f], nx.s);
//       }
//     }

//   }


  
// }



// int best_path(int N, int K, int H[][2], int L[])
// {

//   k = K;
//   FOR(i, 0, N-1) {
//     adj[H[i][0]].pb({H[i][1], L[i]});
//   }

//   dfs();
//   solve(0);
//   if (ans == 1e9) ans = -1;
//   return ans;
// }

#include <bits/stdc++.h>

using namespace std;

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

#define pb push_back

#define f first
#define s second

const int maxn = 2e5 + 1;
vector<pii> adj[maxn];
map<ll, ll> info[maxn];
ll dist[maxn], sum[maxn];  // define these relative to root
int N, K;
ll ret;

void precomp(int u, int p, ll c, int h) {
	info[u][c] = h;
	sum[u] = c;
	dist[u] = h;
	for (auto n : adj[u]) {
		if (p == n.f) { continue; }
		precomp(n.f, u, c + n.s, h + 1);
	}
}

void small_to_large_merge(int u, int p) {
	ll target = K + 2 * sum[u];
	for (auto n : adj[u]) {
		if (n.f == p) { continue; }
		small_to_large_merge(n.f, u);
		if (info[n.f].size() > info[u].size()) { swap(info[n.f], info[u]); }
		for (auto i : info[n.f]) {
			if (info[u].find(target - i.f) != info[u].end()) {
				ret = min(ret, info[u][target - i.f] + i.s - 2 * dist[u]);
			}
		}
		for (auto i : info[n.f]) {
			if (info[u].find(i.f) == info[u].end()) {
				info[u].insert(i);
			} else {
				info[u][i.f] = min(info[u][i.f], i.s);
			}
		}
	}
}

int best_path(int n, int k, int edges[][2], int weights[]) {
	if (k == 1) { return 0; }
	N = n;
	K = k;
	ret = INT_MAX;
	for (int i = 0; i < n - 1; i++) {
		int u = edges[i][0];
		int v = edges[i][1];
		adj[u].pb(pii(v, weights[i]));
		adj[v].pb(pii(u, weights[i]));
	}
	precomp(0, -1, 0, 0);
	small_to_large_merge(0, -1);
	return ret == INT_MAX ? -1 : ret;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14440 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14360 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 9 ms 14456 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 9 ms 14420 KB Output is correct
11 Correct 9 ms 14452 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 8 ms 14416 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14440 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14360 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 9 ms 14456 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 9 ms 14420 KB Output is correct
11 Correct 9 ms 14452 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 8 ms 14416 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 8 ms 14420 KB Output is correct
20 Correct 9 ms 14432 KB Output is correct
21 Correct 10 ms 14632 KB Output is correct
22 Correct 9 ms 14676 KB Output is correct
23 Correct 11 ms 14668 KB Output is correct
24 Correct 10 ms 14676 KB Output is correct
25 Correct 8 ms 14676 KB Output is correct
26 Correct 9 ms 14704 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 10 ms 14664 KB Output is correct
29 Correct 9 ms 14668 KB Output is correct
30 Correct 9 ms 14668 KB Output is correct
31 Correct 10 ms 14716 KB Output is correct
32 Correct 9 ms 14672 KB Output is correct
33 Correct 10 ms 14728 KB Output is correct
34 Correct 10 ms 14676 KB Output is correct
35 Correct 9 ms 14628 KB Output is correct
36 Correct 9 ms 14664 KB Output is correct
37 Correct 9 ms 14584 KB Output is correct
38 Correct 9 ms 14680 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14440 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14360 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 9 ms 14456 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 9 ms 14420 KB Output is correct
11 Correct 9 ms 14452 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 8 ms 14416 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 145 ms 37808 KB Output is correct
20 Correct 167 ms 39120 KB Output is correct
21 Correct 143 ms 38948 KB Output is correct
22 Correct 145 ms 38548 KB Output is correct
23 Correct 214 ms 51324 KB Output is correct
24 Correct 145 ms 41344 KB Output is correct
25 Correct 133 ms 39956 KB Output is correct
26 Correct 74 ms 48240 KB Output is correct
27 Correct 234 ms 52576 KB Output is correct
28 Correct 361 ms 93936 KB Output is correct
29 Correct 359 ms 92980 KB Output is correct
30 Correct 229 ms 52704 KB Output is correct
31 Correct 225 ms 52584 KB Output is correct
32 Correct 316 ms 52752 KB Output is correct
33 Correct 298 ms 57548 KB Output is correct
34 Correct 453 ms 90304 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14440 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 7 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14360 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 9 ms 14456 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 9 ms 14420 KB Output is correct
11 Correct 9 ms 14452 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 8 ms 14420 KB Output is correct
15 Correct 8 ms 14420 KB Output is correct
16 Correct 8 ms 14416 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 8 ms 14420 KB Output is correct
19 Correct 8 ms 14420 KB Output is correct
20 Correct 9 ms 14432 KB Output is correct
21 Correct 10 ms 14632 KB Output is correct
22 Correct 9 ms 14676 KB Output is correct
23 Correct 11 ms 14668 KB Output is correct
24 Correct 10 ms 14676 KB Output is correct
25 Correct 8 ms 14676 KB Output is correct
26 Correct 9 ms 14704 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 10 ms 14664 KB Output is correct
29 Correct 9 ms 14668 KB Output is correct
30 Correct 9 ms 14668 KB Output is correct
31 Correct 10 ms 14716 KB Output is correct
32 Correct 9 ms 14672 KB Output is correct
33 Correct 10 ms 14728 KB Output is correct
34 Correct 10 ms 14676 KB Output is correct
35 Correct 9 ms 14628 KB Output is correct
36 Correct 9 ms 14664 KB Output is correct
37 Correct 9 ms 14584 KB Output is correct
38 Correct 9 ms 14680 KB Output is correct
39 Correct 145 ms 37808 KB Output is correct
40 Correct 167 ms 39120 KB Output is correct
41 Correct 143 ms 38948 KB Output is correct
42 Correct 145 ms 38548 KB Output is correct
43 Correct 214 ms 51324 KB Output is correct
44 Correct 145 ms 41344 KB Output is correct
45 Correct 133 ms 39956 KB Output is correct
46 Correct 74 ms 48240 KB Output is correct
47 Correct 234 ms 52576 KB Output is correct
48 Correct 361 ms 93936 KB Output is correct
49 Correct 359 ms 92980 KB Output is correct
50 Correct 229 ms 52704 KB Output is correct
51 Correct 225 ms 52584 KB Output is correct
52 Correct 316 ms 52752 KB Output is correct
53 Correct 298 ms 57548 KB Output is correct
54 Correct 453 ms 90304 KB Output is correct
55 Correct 22 ms 17752 KB Output is correct
56 Correct 16 ms 16516 KB Output is correct
57 Correct 80 ms 36756 KB Output is correct
58 Correct 57 ms 29184 KB Output is correct
59 Correct 109 ms 54552 KB Output is correct
60 Correct 367 ms 93492 KB Output is correct
61 Correct 251 ms 55852 KB Output is correct
62 Correct 219 ms 52752 KB Output is correct
63 Correct 314 ms 52728 KB Output is correct
64 Correct 493 ms 107516 KB Output is correct
65 Correct 472 ms 105616 KB Output is correct
66 Correct 347 ms 88908 KB Output is correct
67 Correct 213 ms 45488 KB Output is correct
68 Correct 389 ms 69052 KB Output is correct
69 Correct 409 ms 73884 KB Output is correct
70 Correct 405 ms 64600 KB Output is correct