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답안 #31083

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
31083 2017-08-06T17:00:23 Z WhipppedCream 경주 (Race) (IOI11_race) C++14
100 / 100
 1327 ms 38380 KB 
#include <bits/stdc++.h>
#include "race.h"
#define ii pair<int, int>
#define X first
#define Y second
#define pb push_back
#define vi vector<int>
#define vii vector< pair<int, int> >
#define iii pair< ii, int >
typedef long long ll;
using namespace std;
vector< ii > adj[200005];
int use[200005];
int deg[200005];
int maxnow[200005];
int mic[200005];
void memsetNode(int u, int par)
{
    mic[u] = -1;
    maxnow[u] = 0;
    //printf("set 0 at %d\n", u);
    for(int i = 0; i< (int) adj[u].size(); i++)
    {
        int v = adj[u][i].X;
        if(use[v]) continue;
        if(v == par) continue;
        memsetNode(v, u);
    }
}
int cnt(int u, int par)
{
    if(mic[u] != -1) return mic[u];
    int sum = 1;
    for(int i = 0; i< (int) adj[u].size(); i++)
    {
        int v = adj[u][i].X;
        if(use[v]) continue;
        if(v == par) continue;
        sum += cnt(v, u);
    }
    //printf("computed %d %d\n", u, par);
    return mic[u] = sum;
}
void update(int u, int par, int book)
{
    //printf("update %d %d %d\n", u, par, book);
    maxnow[u] = max(maxnow[u], book);
    int sm = 1;
    for(int i = 0; i< (int) adj[u].size(); i++)
    {
        ii k = adj[u][i];
        if(k.X == par) continue;
        if(use[k.X]) continue;
        maxnow[k.X] = max(maxnow[k.X], 1+book);
        maxnow[u] = max(maxnow[u], cnt(k.X, u));
        //printf("added (%d, %d)", k.X, u);
        sm += cnt(k.X, u);
    }
    sm += book;
    //printf("sm is %d for %d\n", sm, u);
    for(int i = 0; i< (int) adj[u].size(); i++)
    {
        ii k = adj[u][i];
        if(k.X == par) continue;
        if(use[k.X]) continue;
        update(k.X, u, sm - cnt(k.X, u));
    }
}
int findBest(int u, int par)
{
    int best = -1;
    //printf("%d: %d\n", u, maxnow[u]);
    for(int i = 0; i< (int) adj[u].size(); i++)
    {
        int v = adj[u][i].X;
        if(use[v]) continue;
        if(v == par) continue;
        int here = findBest(v, u);
        if(best == -1 || maxnow[here]< maxnow[best]) best = here;
    }
    int res;
    if(best == -1) res = u;
    else if(maxnow[best]< maxnow[u]) res = best;
    else res = u;
    //printf("of size %d\n", maxnow[res]);
    return res;
}
int memsetcnt = 0;
void findNode(int u, int par)
{
    //printf("its me\n");
    int st = u;
    //printf("--------memsetting %d %d\n", u, par);
    memsetcnt++;
    //if(memsetcnt % 10000 == 0) printf("%d\n", memsetcnt/1000);
    memsetNode(u, par);
    update(st, par, 0);
    //printf("kuy\n");
}
int bestPath[1000005];
vii joe;
void diep(int u, int par, int dist, int len)
{
    if(dist > 1000000) return;
    joe.pb(ii(dist, len));
    //printf("%d %d %d %d\n", u, par, dist, len);
    for(int i = 0; i< (int) adj[u].size(); i++)
    {
        int v = adj[u][i].X;
        int w = adj[u][i].Y;
        if(v == par) continue;
        if(use[v]) continue;
        diep(v, u, dist+w, len+1);
    }
}
int k;
int n;
int solve(int u, int par)
{
    //memset maxnow 0
    //memset mic
    //printf("hello\n");
    findNode(u, par);
    int root = findBest(u, par);
    //printf("--------------root is %d\n", root);
    vector<int> Set;
    int best = 1e9;
    bestPath[0] = 0;
    for(int i = 0; i< (int) adj[root].size(); i++)
    {
        joe.clear();
        int v = adj[root][i].X;
        if(v == par) continue;
        if(use[v]) continue;
        diep(v, root, adj[root][i].Y, 1);
        for(int j = 0; j< (int) joe.size(); j++)
        {
            Set.pb(joe[j].X);
            if(k-joe[j].X >= 0 && bestPath[k-joe[j].X] != -1)
            {
                best = min(best, bestPath[k-joe[j].X] + joe[j].Y);
            }
        }
        for(int j = 0; j< (int) joe.size(); j++)
        {
            if(bestPath[joe[j].X] == -1 || bestPath[joe[j].X] > joe[j].Y) bestPath[joe[j].X] = joe[j].Y;
            //lprintf("%d\n", joe[j].X);
        }
    }
    use[root] = 1;
    for(int i = 0; i< (int) Set.size(); i++)
    {
        bestPath[Set[i]] = -1;
    }
    for(int i = 0; i< (int) adj[root].size(); i++)
    {
        int v = adj[root][i].X;
        if(v == par) continue;
        if(use[v]) continue;
        best = min(best, solve(v, root));
    }
    return best;
}
int best_path(int N, int K, int H[][2], int L[])
{
    memset(bestPath, -1, sizeof bestPath);
    memset(mic, -1, sizeof mic);
    //freopen("grader.in.16", "r", stdin);
	n = N; k = K;
    for(int i = 0; i< n-1; i++)
    {
        int a, b, w;
		a = H[i][0], b = H[i][1], w = L[i];
        adj[a].pb(ii(b, w));
        adj[b].pb(ii(a, w));
        deg[a]++; deg[b]++;
    }
    int res = solve(0, -1);
    if(res == 1e9) return -1;
    return res;
	return 0;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9848 KB Output is correct
2 Correct 11 ms 9848 KB Output is correct
3 Correct 10 ms 9892 KB Output is correct
4 Correct 10 ms 10016 KB Output is correct
5 Correct 10 ms 10016 KB Output is correct
6 Correct 10 ms 10016 KB Output is correct
7 Correct 10 ms 10016 KB Output is correct
8 Correct 9 ms 10016 KB Output is correct
9 Correct 9 ms 10016 KB Output is correct
10 Correct 10 ms 10016 KB Output is correct
11 Correct 11 ms 10016 KB Output is correct
12 Correct 10 ms 10016 KB Output is correct
13 Correct 10 ms 10016 KB Output is correct
14 Correct 10 ms 10016 KB Output is correct
15 Correct 10 ms 10016 KB Output is correct
16 Correct 10 ms 10092 KB Output is correct
17 Correct 9 ms 10092 KB Output is correct
18 Correct 10 ms 10092 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9848 KB Output is correct
2 Correct 11 ms 9848 KB Output is correct
3 Correct 10 ms 9892 KB Output is correct
4 Correct 10 ms 10016 KB Output is correct
5 Correct 10 ms 10016 KB Output is correct
6 Correct 10 ms 10016 KB Output is correct
7 Correct 10 ms 10016 KB Output is correct
8 Correct 9 ms 10016 KB Output is correct
9 Correct 9 ms 10016 KB Output is correct
10 Correct 10 ms 10016 KB Output is correct
11 Correct 11 ms 10016 KB Output is correct
12 Correct 10 ms 10016 KB Output is correct
13 Correct 10 ms 10016 KB Output is correct
14 Correct 10 ms 10016 KB Output is correct
15 Correct 10 ms 10016 KB Output is correct
16 Correct 10 ms 10092 KB Output is correct
17 Correct 9 ms 10092 KB Output is correct
18 Correct 10 ms 10092 KB Output is correct
19 Correct 10 ms 10092 KB Output is correct
20 Correct 9 ms 10092 KB Output is correct
21 Correct 11 ms 10092 KB Output is correct
22 Correct 10 ms 10108 KB Output is correct
23 Correct 12 ms 10108 KB Output is correct
24 Correct 10 ms 10108 KB Output is correct
25 Correct 13 ms 10108 KB Output is correct
26 Correct 11 ms 10108 KB Output is correct
27 Correct 11 ms 10108 KB Output is correct
28 Correct 10 ms 10108 KB Output is correct
29 Correct 12 ms 10108 KB Output is correct
30 Correct 10 ms 10108 KB Output is correct
31 Correct 11 ms 10108 KB Output is correct
32 Correct 11 ms 10108 KB Output is correct
33 Correct 11 ms 10108 KB Output is correct
34 Correct 12 ms 10108 KB Output is correct
35 Correct 11 ms 10108 KB Output is correct
36 Correct 10 ms 10108 KB Output is correct
37 Correct 11 ms 10108 KB Output is correct
38 Correct 10 ms 10108 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9848 KB Output is correct
2 Correct 11 ms 9848 KB Output is correct
3 Correct 10 ms 9892 KB Output is correct
4 Correct 10 ms 10016 KB Output is correct
5 Correct 10 ms 10016 KB Output is correct
6 Correct 10 ms 10016 KB Output is correct
7 Correct 10 ms 10016 KB Output is correct
8 Correct 9 ms 10016 KB Output is correct
9 Correct 9 ms 10016 KB Output is correct
10 Correct 10 ms 10016 KB Output is correct
11 Correct 11 ms 10016 KB Output is correct
12 Correct 10 ms 10016 KB Output is correct
13 Correct 10 ms 10016 KB Output is correct
14 Correct 10 ms 10016 KB Output is correct
15 Correct 10 ms 10016 KB Output is correct
16 Correct 10 ms 10092 KB Output is correct
17 Correct 9 ms 10092 KB Output is correct
18 Correct 10 ms 10092 KB Output is correct
19 Correct 346 ms 17248 KB Output is correct
20 Correct 306 ms 17264 KB Output is correct
21 Correct 371 ms 17264 KB Output is correct
22 Correct 352 ms 17264 KB Output is correct
23 Correct 338 ms 17276 KB Output is correct
24 Correct 155 ms 17276 KB Output is correct
25 Correct 346 ms 20856 KB Output is correct
26 Correct 186 ms 24496 KB Output is correct
27 Correct 411 ms 24496 KB Output is correct
28 Correct 1061 ms 37448 KB Output is correct
29 Correct 1154 ms 37448 KB Output is correct
30 Correct 364 ms 37448 KB Output is correct
31 Correct 372 ms 37448 KB Output is correct
32 Correct 531 ms 37448 KB Output is correct
33 Correct 835 ms 37448 KB Output is correct
34 Correct 705 ms 37448 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9848 KB Output is correct
2 Correct 11 ms 9848 KB Output is correct
3 Correct 10 ms 9892 KB Output is correct
4 Correct 10 ms 10016 KB Output is correct
5 Correct 10 ms 10016 KB Output is correct
6 Correct 10 ms 10016 KB Output is correct
7 Correct 10 ms 10016 KB Output is correct
8 Correct 9 ms 10016 KB Output is correct
9 Correct 9 ms 10016 KB Output is correct
10 Correct 10 ms 10016 KB Output is correct
11 Correct 11 ms 10016 KB Output is correct
12 Correct 10 ms 10016 KB Output is correct
13 Correct 10 ms 10016 KB Output is correct
14 Correct 10 ms 10016 KB Output is correct
15 Correct 10 ms 10016 KB Output is correct
16 Correct 10 ms 10092 KB Output is correct
17 Correct 9 ms 10092 KB Output is correct
18 Correct 10 ms 10092 KB Output is correct
19 Correct 10 ms 10092 KB Output is correct
20 Correct 9 ms 10092 KB Output is correct
21 Correct 11 ms 10092 KB Output is correct
22 Correct 10 ms 10108 KB Output is correct
23 Correct 12 ms 10108 KB Output is correct
24 Correct 10 ms 10108 KB Output is correct
25 Correct 13 ms 10108 KB Output is correct
26 Correct 11 ms 10108 KB Output is correct
27 Correct 11 ms 10108 KB Output is correct
28 Correct 10 ms 10108 KB Output is correct
29 Correct 12 ms 10108 KB Output is correct
30 Correct 10 ms 10108 KB Output is correct
31 Correct 11 ms 10108 KB Output is correct
32 Correct 11 ms 10108 KB Output is correct
33 Correct 11 ms 10108 KB Output is correct
34 Correct 12 ms 10108 KB Output is correct
35 Correct 11 ms 10108 KB Output is correct
36 Correct 10 ms 10108 KB Output is correct
37 Correct 11 ms 10108 KB Output is correct
38 Correct 10 ms 10108 KB Output is correct
39 Correct 346 ms 17248 KB Output is correct
40 Correct 306 ms 17264 KB Output is correct
41 Correct 371 ms 17264 KB Output is correct
42 Correct 352 ms 17264 KB Output is correct
43 Correct 338 ms 17276 KB Output is correct
44 Correct 155 ms 17276 KB Output is correct
45 Correct 346 ms 20856 KB Output is correct
46 Correct 186 ms 24496 KB Output is correct
47 Correct 411 ms 24496 KB Output is correct
48 Correct 1061 ms 37448 KB Output is correct
49 Correct 1154 ms 37448 KB Output is correct
50 Correct 364 ms 37448 KB Output is correct
51 Correct 372 ms 37448 KB Output is correct
52 Correct 531 ms 37448 KB Output is correct
53 Correct 835 ms 37448 KB Output is correct
54 Correct 705 ms 37448 KB Output is correct
55 Correct 28 ms 37448 KB Output is correct
56 Correct 27 ms 37448 KB Output is correct
57 Correct 161 ms 37448 KB Output is correct
58 Correct 60 ms 37448 KB Output is correct
59 Correct 194 ms 37448 KB Output is correct
60 Correct 1327 ms 38380 KB Output is correct
61 Correct 375 ms 38380 KB Output is correct
62 Correct 323 ms 38380 KB Output is correct
63 Correct 556 ms 38380 KB Output is correct
64 Correct 1062 ms 38380 KB Output is correct
65 Correct 565 ms 38380 KB Output is correct
66 Correct 857 ms 38380 KB Output is correct
67 Correct 197 ms 38380 KB Output is correct
68 Correct 492 ms 38380 KB Output is correct
69 Correct 528 ms 38380 KB Output is correct
70 Correct 501 ms 38380 KB Output is correct