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답안 #709942

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
709942 2023-03-15T00:19:22 Z Ozy 경주 (Race) (IOI11_race) C++17
100 / 100
 1332 ms 55428 KB 
#include "race.h"
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#define rep(i,a,b) for(int i = (a); i <= (b); i++)
#define repa(i,a,b) for(int i = (a); i >= (b); i--)
#define pll pair<lli,lli>

#define MAX 200000

#define des first
#define d second

vector<pll> hijos[MAX+2];
lli n,k,res,act,padre,mitad;
//centroid
lli tam[MAX+2],vis[MAX+2];
queue<lli> cola;
bool cond;
map<lli,lli> abso,rama;

void dfs(lli pos, lli p) {
    tam[pos] = 1;
    for(auto h : hijos[pos]) {
        if (vis[h.des] == 1 || h.des == p) continue;
        dfs(h.des,pos);
        tam[pos] += tam[h.des];
    }
}

void sub(lli pos, lli p,lli cam, lli sum) {

    //checa contra abso
    if (sum > k) return;
    lli x,a = k-sum;

    if (abso.find(a) != abso.end()) {
        x = abso[a] + cam;
        if (res == -1 || res > x) res = x;
    }

    //me meto a rama
    if (rama.find(sum) != rama.end()) rama[sum] = min(rama[sum],cam);
    else rama[sum] = cam;

    //sigo procesando el subarbol
    for(auto h : hijos[pos]) {
        if (h.des == p || vis[h.des] == 1) continue;
        sub(h.des,pos,cam+1,sum+h.d);
    }
}

void solve(lli raiz) {

    abso.clear();
    abso[0] = 0;

    for(auto h : hijos[raiz]) {
        if (vis[h.des] == 1) continue;
        rama.clear();
        sub(h.des,raiz,1,h.d);

        if (rama.size() > abso.size()) swap(abso,rama);
        for (auto act : rama) {
            if (abso.find(act.first) != abso.end()) abso[act.first] = min(abso[act.first], act.second);
            else abso[act.first] = act.second;
        }
    }

}

int best_path(int N, int K, int H[][2], int L[])
{
    n = N;
    k = K;
    res = -1;
    rep(i,0,n-2) {
        hijos[H[i][0]+1].push_back({H[i][1]+1, L[i]});
        hijos[H[i][1]+1].push_back({H[i][0]+1, L[i]});
    }

    cola.push(1);
    while(!cola.empty()){
        act = cola.front();
        cola.pop();

        dfs(act,0);                     //obtengo el centroide
        mitad = tam[act]/2;
        padre = 0;
        do{
            cond = false;
            for(auto h : hijos[act]) {
                if (h.des == padre || vis[h.des] == 1 || tam[h.des] <= mitad) continue;
                padre = act;
                act = h.des;
                cond = true;
                break;
            }
        }while(cond);

        solve(act);

        vis[act] = 1;
        for(auto h : hijos[act]) {
            if (vis[h.des] == 1) continue;
            cola.push(h.des);
        }
    }

    return res;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 5016 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 4936 KB Output is correct
6 Correct 5 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 5012 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 5008 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4944 KB Output is correct
18 Correct 3 ms 5012 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 5016 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 4936 KB Output is correct
6 Correct 5 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 5012 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 5008 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4944 KB Output is correct
18 Correct 3 ms 5012 KB Output is correct
19 Correct 4 ms 5012 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 5 ms 5076 KB Output is correct
22 Correct 4 ms 5076 KB Output is correct
23 Correct 3 ms 5076 KB Output is correct
24 Correct 4 ms 5076 KB Output is correct
25 Correct 5 ms 5100 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 3 ms 5076 KB Output is correct
28 Correct 5 ms 5076 KB Output is correct
29 Correct 4 ms 5076 KB Output is correct
30 Correct 4 ms 5152 KB Output is correct
31 Correct 4 ms 5076 KB Output is correct
32 Correct 5 ms 5204 KB Output is correct
33 Correct 5 ms 5152 KB Output is correct
34 Correct 6 ms 5076 KB Output is correct
35 Correct 5 ms 5076 KB Output is correct
36 Correct 6 ms 5084 KB Output is correct
37 Correct 6 ms 5148 KB Output is correct
38 Correct 6 ms 5076 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 5016 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 4936 KB Output is correct
6 Correct 5 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 5012 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 5008 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4944 KB Output is correct
18 Correct 3 ms 5012 KB Output is correct
19 Correct 278 ms 14328 KB Output is correct
20 Correct 259 ms 14328 KB Output is correct
21 Correct 276 ms 14540 KB Output is correct
22 Correct 254 ms 14564 KB Output is correct
23 Correct 125 ms 14924 KB Output is correct
24 Correct 87 ms 14488 KB Output is correct
25 Correct 149 ms 18160 KB Output is correct
26 Correct 111 ms 21812 KB Output is correct
27 Correct 253 ms 24616 KB Output is correct
28 Correct 484 ms 39160 KB Output is correct
29 Correct 443 ms 37984 KB Output is correct
30 Correct 252 ms 24524 KB Output is correct
31 Correct 256 ms 24576 KB Output is correct
32 Correct 384 ms 24756 KB Output is correct
33 Correct 450 ms 23380 KB Output is correct
34 Correct 352 ms 24200 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 5016 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 4936 KB Output is correct
6 Correct 5 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 5012 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 5008 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4944 KB Output is correct
18 Correct 3 ms 5012 KB Output is correct
19 Correct 4 ms 5012 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 5 ms 5076 KB Output is correct
22 Correct 4 ms 5076 KB Output is correct
23 Correct 3 ms 5076 KB Output is correct
24 Correct 4 ms 5076 KB Output is correct
25 Correct 5 ms 5100 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 3 ms 5076 KB Output is correct
28 Correct 5 ms 5076 KB Output is correct
29 Correct 4 ms 5076 KB Output is correct
30 Correct 4 ms 5152 KB Output is correct
31 Correct 4 ms 5076 KB Output is correct
32 Correct 5 ms 5204 KB Output is correct
33 Correct 5 ms 5152 KB Output is correct
34 Correct 6 ms 5076 KB Output is correct
35 Correct 5 ms 5076 KB Output is correct
36 Correct 6 ms 5084 KB Output is correct
37 Correct 6 ms 5148 KB Output is correct
38 Correct 6 ms 5076 KB Output is correct
39 Correct 278 ms 14328 KB Output is correct
40 Correct 259 ms 14328 KB Output is correct
41 Correct 276 ms 14540 KB Output is correct
42 Correct 254 ms 14564 KB Output is correct
43 Correct 125 ms 14924 KB Output is correct
44 Correct 87 ms 14488 KB Output is correct
45 Correct 149 ms 18160 KB Output is correct
46 Correct 111 ms 21812 KB Output is correct
47 Correct 253 ms 24616 KB Output is correct
48 Correct 484 ms 39160 KB Output is correct
49 Correct 443 ms 37984 KB Output is correct
50 Correct 252 ms 24524 KB Output is correct
51 Correct 256 ms 24576 KB Output is correct
52 Correct 384 ms 24756 KB Output is correct
53 Correct 450 ms 23380 KB Output is correct
54 Correct 352 ms 24200 KB Output is correct
55 Correct 23 ms 6096 KB Output is correct
56 Correct 16 ms 5864 KB Output is correct
57 Correct 150 ms 14912 KB Output is correct
58 Correct 54 ms 14388 KB Output is correct
59 Correct 364 ms 29424 KB Output is correct
60 Correct 1239 ms 55428 KB Output is correct
61 Correct 345 ms 24804 KB Output is correct
62 Correct 366 ms 24684 KB Output is correct
63 Correct 509 ms 24684 KB Output is correct
64 Correct 1332 ms 32948 KB Output is correct
65 Correct 372 ms 25008 KB Output is correct
66 Correct 830 ms 35480 KB Output is correct
67 Correct 151 ms 24948 KB Output is correct
68 Correct 513 ms 29028 KB Output is correct
69 Correct 514 ms 29004 KB Output is correct
70 Correct 519 ms 27908 KB Output is correct