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답안 #720145

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
720145 2023-04-07T13:49:41 Z ooo 경주 (Race) (IOI11_race) C++14
100 / 100
 559 ms 50092 KB 
#include <bits/stdc++.h>
#include "race.h"

using namespace std;
#define ll long long
const int nu = 3e5+5;
const int nuu = 1e6+6;
typedef pair<ll, ll> cap;
ll n, k, s[nu], f[nu], ans = 1e9, hh[nu], ms[nuu], pre[nuu];
bool r[nu];
vector< vector<cap> > g;
int dfs(int u, int t)
{
    s[u] = 1;
    for(cap x : g[u])
    {
        int v = x.first;
        if(r[v] || v == t) continue;
        s[u] += dfs(v, u);
    }
    return s[u];
}
int get_centroid(int u, int t, int sum)
{
    for(cap x : g[u])
    {
        int v = x.first;
        if(r[v] || v == t) continue;
        if(s[v]*2 > sum) return get_centroid(v, u, sum);
    }
    return u;
}
void dfs2(int u, int t, int w, int ok, int c)
{
    f[u] = f[t]+w; hh[u] = hh[t]+1;
    if(f[u] > k) return ;
    if(ok == 1)
    {
        if(pre[f[u]] != c) pre[f[u]] = c, ms[f[u]] = hh[u];
        else ms[f[u]] = min(ms[f[u]], hh[u]);
    }
    else
    {
        if(pre[k-f[u]] == c) ans = min(ans, hh[u]+ms[k-f[u]]);
    }
    for(cap x : g[u])
    {
        int v = x.first;
        ll l = x.second;
        if(v == t || r[v]) continue;
        dfs2(v, u, l, ok, c);
    }
}
void centroid(int u)
{
    int cnt = dfs(u, 0);
    int c = get_centroid(u, 0, cnt);
    r[c] = true;

    pre[0] = c; ms[0] = 0;
    for(cap x : g[c])
    {
        int v = x.first;
        ll l = x.second;
        if(r[v]) continue;
        dfs2(v, 0, l, 0, c); dfs2(v, 0, l, 1, c);
    }

    for(cap x : g[c])
    {
        int v = x.first;
        if(!r[v]) centroid(v);
    }
}
int best_path(int x, int y, int H[][2], int L[])
{
    n = x; k = y;
    g.resize(n+1);
    for(int i = 0; i < n-1; ++i)
    {
        ll u = H[i][0]; ll v = H[i][1]; ll c = L[i];
        u++; v++;
        g[u].push_back({v, c});
        g[v].push_back({u, c});
    }
    centroid(1);
    if(ans == 1e9) ans = -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 4 ms 7124 KB Output is correct
23 Correct 5 ms 6100 KB Output is correct
24 Correct 7 ms 8596 KB Output is correct
25 Correct 5 ms 6740 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 3 ms 3540 KB Output is correct
29 Correct 3 ms 5332 KB Output is correct
30 Correct 4 ms 5844 KB Output is correct
31 Correct 4 ms 6996 KB Output is correct
32 Correct 7 ms 6996 KB Output is correct
33 Correct 6 ms 9940 KB Output is correct
34 Correct 6 ms 8404 KB Output is correct
35 Correct 7 ms 10324 KB Output is correct
36 Correct 10 ms 11140 KB Output is correct
37 Correct 6 ms 6868 KB Output is correct
38 Correct 4 ms 4692 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 137 ms 11420 KB Output is correct
20 Correct 141 ms 12768 KB Output is correct
21 Correct 136 ms 12688 KB Output is correct
22 Correct 176 ms 12748 KB Output is correct
23 Correct 75 ms 13176 KB Output is correct
24 Correct 59 ms 12444 KB Output is correct
25 Correct 129 ms 15656 KB Output is correct
26 Correct 110 ms 18492 KB Output is correct
27 Correct 202 ms 25840 KB Output is correct
28 Correct 265 ms 37228 KB Output is correct
29 Correct 313 ms 36416 KB Output is correct
30 Correct 157 ms 25840 KB Output is correct
31 Correct 169 ms 25756 KB Output is correct
32 Correct 211 ms 25860 KB Output is correct
33 Correct 215 ms 24596 KB Output is correct
34 Correct 256 ms 25468 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 4 ms 7124 KB Output is correct
23 Correct 5 ms 6100 KB Output is correct
24 Correct 7 ms 8596 KB Output is correct
25 Correct 5 ms 6740 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 3 ms 3540 KB Output is correct
29 Correct 3 ms 5332 KB Output is correct
30 Correct 4 ms 5844 KB Output is correct
31 Correct 4 ms 6996 KB Output is correct
32 Correct 7 ms 6996 KB Output is correct
33 Correct 6 ms 9940 KB Output is correct
34 Correct 6 ms 8404 KB Output is correct
35 Correct 7 ms 10324 KB Output is correct
36 Correct 10 ms 11140 KB Output is correct
37 Correct 6 ms 6868 KB Output is correct
38 Correct 4 ms 4692 KB Output is correct
39 Correct 137 ms 11420 KB Output is correct
40 Correct 141 ms 12768 KB Output is correct
41 Correct 136 ms 12688 KB Output is correct
42 Correct 176 ms 12748 KB Output is correct
43 Correct 75 ms 13176 KB Output is correct
44 Correct 59 ms 12444 KB Output is correct
45 Correct 129 ms 15656 KB Output is correct
46 Correct 110 ms 18492 KB Output is correct
47 Correct 202 ms 25840 KB Output is correct
48 Correct 265 ms 37228 KB Output is correct
49 Correct 313 ms 36416 KB Output is correct
50 Correct 157 ms 25840 KB Output is correct
51 Correct 169 ms 25756 KB Output is correct
52 Correct 211 ms 25860 KB Output is correct
53 Correct 215 ms 24596 KB Output is correct
54 Correct 256 ms 25468 KB Output is correct
55 Correct 9 ms 1608 KB Output is correct
56 Correct 10 ms 1492 KB Output is correct
57 Correct 77 ms 13096 KB Output is correct
58 Correct 36 ms 12092 KB Output is correct
59 Correct 106 ms 20176 KB Output is correct
60 Correct 531 ms 45892 KB Output is correct
61 Correct 196 ms 26000 KB Output is correct
62 Correct 242 ms 25940 KB Output is correct
63 Correct 256 ms 25948 KB Output is correct
64 Correct 559 ms 30248 KB Output is correct
65 Correct 255 ms 26532 KB Output is correct
66 Correct 447 ms 50092 KB Output is correct
67 Correct 116 ms 25108 KB Output is correct
68 Correct 255 ms 36368 KB Output is correct
69 Correct 240 ms 36556 KB Output is correct
70 Correct 225 ms 35004 KB Output is correct