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답안 #941455

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
941455 2024-03-09T01:06:40 Z Mike_Vu 경주 (Race) (IOI11_race) C++14
100 / 100
 218 ms 53324 KB 
#include<bits/stdc++.h>

using namespace std;

const int MAX = 1e6 + 5;
const int inf = 1e9;

int n, k, res = inf, sz[MAX], min_length[MAX];
bool deleted[MAX];
vector<int> undo_length;
vector<pair<int, int>> adj[MAX];
stack<pair<int, int>> updates;

int get_size(int u, int pre){
    sz[u] = 1;
    for(auto [v, w] : adj[u]) if(v != pre and !deleted[v]){
        sz[u] += get_size(v, u);
    }
    return sz[u];
}

int find_centroid(int u, int pre, int target){
    for(auto [v, w] : adj[u]) if(v != pre and !deleted[v] and sz[v] * 2 > target){
        return find_centroid(v, u, target);
    }
    return u;
}

void compute(int u, int pre, int len, int sum){
    if(sum > k) return;
    res = min(res, len + min_length[k - sum]);
    updates.push(make_pair(len, sum));
    for(auto [v, w] : adj[u]) if(v != pre and !deleted[v]){
        compute(v, u, len + 1, sum + w);
    }
}

void decompose(int u){
    int c = find_centroid(u, -1, get_size(u, -1));
    deleted[c] = true;

    undo_length.clear();
    for(auto [v, w] : adj[c]) if(!deleted[v]){
        compute(v, c, 1, w);
        while(!updates.empty()){
            int len, sum;
            tie(len, sum) = updates.top(); updates.pop();
            min_length[sum] = min(min_length[sum], len);
            undo_length.push_back(sum);
        }
    }

    for(auto v : undo_length) min_length[v] = inf;
    for(auto [v, w] : adj[c]) if(!deleted[v]){
        decompose(v);
    }
}

int best_path(int N, int K, int H[][2], int L[]){
    n = N; k = K;
    for(int i = 0; i < n - 1; ++i){
        int u = H[i][0], v = H[i][1], w = L[i];
        adj[u].push_back({v, w});
        adj[v].push_back({u, w});
    }

    fill(min_length + 1, min_length + 1 + k, inf);
    decompose(1);
    if(res >= inf) res = -1;
    return res;
}

//#define Zero_OP
#ifdef Zero_OP

void init(void){

}

void process(){
    int H[2][2];
    H[0][0] = 0;
    H[0][1] = 1;
    H[1][0] = 1;
    H[1][1] = 2;
    int L[2];
    L[0] = 1;
    L[1] = 1;
    cout << best_path(3, 3, H, L) << '\n';
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    init();
    process();

    return 0;
}
#endif

Compilation message

race.cpp: In function 'int get_size(int, int)':
race.cpp:16:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   16 |     for(auto [v, w] : adj[u]) if(v != pre and !deleted[v]){
      |              ^
race.cpp: In function 'int find_centroid(int, int, int)':
race.cpp:23:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   23 |     for(auto [v, w] : adj[u]) if(v != pre and !deleted[v] and sz[v] * 2 > target){
      |              ^
race.cpp: In function 'void compute(int, int, int, int)':
race.cpp:33:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   33 |     for(auto [v, w] : adj[u]) if(v != pre and !deleted[v]){
      |              ^
race.cpp: In function 'void decompose(int)':
race.cpp:43:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   43 |     for(auto [v, w] : adj[c]) if(!deleted[v]){
      |              ^
race.cpp:54:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   54 |     for(auto [v, w] : adj[c]) if(!deleted[v]){
      |              ^

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 31068 KB Output is correct
2 Correct 7 ms 31068 KB Output is correct
3 Correct 7 ms 31068 KB Output is correct
4 Correct 6 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31204 KB Output is correct
8 Correct 6 ms 31228 KB Output is correct
9 Correct 6 ms 31232 KB Output is correct
10 Correct 6 ms 31068 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 6 ms 31220 KB Output is correct
13 Correct 6 ms 31068 KB Output is correct
14 Correct 6 ms 31204 KB Output is correct
15 Correct 6 ms 31068 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31068 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 31068 KB Output is correct
2 Correct 7 ms 31068 KB Output is correct
3 Correct 7 ms 31068 KB Output is correct
4 Correct 6 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31204 KB Output is correct
8 Correct 6 ms 31228 KB Output is correct
9 Correct 6 ms 31232 KB Output is correct
10 Correct 6 ms 31068 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 6 ms 31220 KB Output is correct
13 Correct 6 ms 31068 KB Output is correct
14 Correct 6 ms 31204 KB Output is correct
15 Correct 6 ms 31068 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31068 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct
19 Correct 6 ms 31064 KB Output is correct
20 Correct 6 ms 31228 KB Output is correct
21 Correct 6 ms 31068 KB Output is correct
22 Correct 7 ms 33116 KB Output is correct
23 Correct 7 ms 33116 KB Output is correct
24 Correct 7 ms 33328 KB Output is correct
25 Correct 7 ms 33116 KB Output is correct
26 Correct 7 ms 33116 KB Output is correct
27 Correct 8 ms 33116 KB Output is correct
28 Correct 7 ms 33276 KB Output is correct
29 Correct 7 ms 33348 KB Output is correct
30 Correct 7 ms 33116 KB Output is correct
31 Correct 8 ms 33116 KB Output is correct
32 Correct 8 ms 33112 KB Output is correct
33 Correct 7 ms 33116 KB Output is correct
34 Correct 7 ms 33116 KB Output is correct
35 Correct 7 ms 33272 KB Output is correct
36 Correct 7 ms 33116 KB Output is correct
37 Correct 7 ms 33116 KB Output is correct
38 Correct 7 ms 33344 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 31068 KB Output is correct
2 Correct 7 ms 31068 KB Output is correct
3 Correct 7 ms 31068 KB Output is correct
4 Correct 6 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31204 KB Output is correct
8 Correct 6 ms 31228 KB Output is correct
9 Correct 6 ms 31232 KB Output is correct
10 Correct 6 ms 31068 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 6 ms 31220 KB Output is correct
13 Correct 6 ms 31068 KB Output is correct
14 Correct 6 ms 31204 KB Output is correct
15 Correct 6 ms 31068 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31068 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct
19 Correct 75 ms 37200 KB Output is correct
20 Correct 74 ms 37172 KB Output is correct
21 Correct 78 ms 37456 KB Output is correct
22 Correct 73 ms 38100 KB Output is correct
23 Correct 54 ms 37460 KB Output is correct
24 Correct 41 ms 37204 KB Output is correct
25 Correct 86 ms 42064 KB Output is correct
26 Correct 65 ms 43860 KB Output is correct
27 Correct 101 ms 41048 KB Output is correct
28 Correct 161 ms 51608 KB Output is correct
29 Correct 150 ms 46932 KB Output is correct
30 Correct 101 ms 41020 KB Output is correct
31 Correct 101 ms 41040 KB Output is correct
32 Correct 117 ms 40848 KB Output is correct
33 Correct 121 ms 39764 KB Output is correct
34 Correct 108 ms 39760 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 31068 KB Output is correct
2 Correct 7 ms 31068 KB Output is correct
3 Correct 7 ms 31068 KB Output is correct
4 Correct 6 ms 31068 KB Output is correct
5 Correct 6 ms 31068 KB Output is correct
6 Correct 6 ms 31068 KB Output is correct
7 Correct 6 ms 31204 KB Output is correct
8 Correct 6 ms 31228 KB Output is correct
9 Correct 6 ms 31232 KB Output is correct
10 Correct 6 ms 31068 KB Output is correct
11 Correct 6 ms 31068 KB Output is correct
12 Correct 6 ms 31220 KB Output is correct
13 Correct 6 ms 31068 KB Output is correct
14 Correct 6 ms 31204 KB Output is correct
15 Correct 6 ms 31068 KB Output is correct
16 Correct 6 ms 31068 KB Output is correct
17 Correct 6 ms 31068 KB Output is correct
18 Correct 6 ms 31068 KB Output is correct
19 Correct 6 ms 31064 KB Output is correct
20 Correct 6 ms 31228 KB Output is correct
21 Correct 6 ms 31068 KB Output is correct
22 Correct 7 ms 33116 KB Output is correct
23 Correct 7 ms 33116 KB Output is correct
24 Correct 7 ms 33328 KB Output is correct
25 Correct 7 ms 33116 KB Output is correct
26 Correct 7 ms 33116 KB Output is correct
27 Correct 8 ms 33116 KB Output is correct
28 Correct 7 ms 33276 KB Output is correct
29 Correct 7 ms 33348 KB Output is correct
30 Correct 7 ms 33116 KB Output is correct
31 Correct 8 ms 33116 KB Output is correct
32 Correct 8 ms 33112 KB Output is correct
33 Correct 7 ms 33116 KB Output is correct
34 Correct 7 ms 33116 KB Output is correct
35 Correct 7 ms 33272 KB Output is correct
36 Correct 7 ms 33116 KB Output is correct
37 Correct 7 ms 33116 KB Output is correct
38 Correct 7 ms 33344 KB Output is correct
39 Correct 75 ms 37200 KB Output is correct
40 Correct 74 ms 37172 KB Output is correct
41 Correct 78 ms 37456 KB Output is correct
42 Correct 73 ms 38100 KB Output is correct
43 Correct 54 ms 37460 KB Output is correct
44 Correct 41 ms 37204 KB Output is correct
45 Correct 86 ms 42064 KB Output is correct
46 Correct 65 ms 43860 KB Output is correct
47 Correct 101 ms 41048 KB Output is correct
48 Correct 161 ms 51608 KB Output is correct
49 Correct 150 ms 46932 KB Output is correct
50 Correct 101 ms 41020 KB Output is correct
51 Correct 101 ms 41040 KB Output is correct
52 Correct 117 ms 40848 KB Output is correct
53 Correct 121 ms 39764 KB Output is correct
54 Correct 108 ms 39760 KB Output is correct
55 Correct 11 ms 31576 KB Output is correct
56 Correct 12 ms 31776 KB Output is correct
57 Correct 53 ms 38364 KB Output is correct
58 Correct 33 ms 39120 KB Output is correct
59 Correct 65 ms 46676 KB Output is correct
60 Correct 202 ms 53324 KB Output is correct
61 Correct 111 ms 42712 KB Output is correct
62 Correct 121 ms 46420 KB Output is correct
63 Correct 167 ms 46064 KB Output is correct
64 Correct 202 ms 45632 KB Output is correct
65 Correct 143 ms 44116 KB Output is correct
66 Correct 218 ms 52312 KB Output is correct
67 Correct 78 ms 48228 KB Output is correct
68 Correct 137 ms 46208 KB Output is correct
69 Correct 143 ms 43988 KB Output is correct
70 Correct 128 ms 46220 KB Output is correct