oj.uz

답안 #519024

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
519024 2022-01-25T11:28:39 Z fabijan_cikac 경주 (Race) (IOI11_race) C++17
100 / 100
 2875 ms 70440 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long int ll;
typedef pair<int, int> pp;
 
const int MAXN = 2 * 1e5 + 100;
const int INF = 2 * 1e9;
 
struct mapa{
    int val = INF;
};
 
int n; int k;
vector<pp> v[MAXN];
int p[MAXN] = { 0 };
int vel[MAXN] = { 0 };
map<int, mapa> m;
vector<int> s;
int sol = INF;
int cnt = 0;
int H[MAXN][2];
int L[MAXN];
 
int dfs(int x, int depth, ll sum, int val, int k){
    p[x] = 1; vel[x] = 0;
    if (val == 1 && sum <= k){
        int zb = depth + m[k - sum].val - 1;
        sol = min(sol, zb);
    }
    else if (val == 2 && sum <= k){
        s.push_back(sum);
        m[sum].val = min(m[sum].val, depth);
    }
    for (int i = 0; i < v[x].size(); ++i){
        int y = v[x][i].first;
        if (!p[y]){
            int rt = dfs(y, depth + 1, sum + v[x][i].second, val, k);
            if (val == 0)
                vel[x] += rt;
        }
    }
    if (val == 0)
        ++vel[x];
    p[x] = 0;
    if (val == 0)
        return vel[x];
    return 0;
}
 
int centr(int x){
    p[x] = 1; pp maks = {-1, -1};
    for (int i = 0; i < v[x].size(); ++i){
        int y = v[x][i].first;
        if (!p[y] && vel[y] > maks.second)
            maks = {y, vel[y]};
    }
    if (maks.second <= cnt / 2){
        p[x] = 0; return x;
    }
    else{
        int rjes = centr(maks.first);
        p[x] = 0; return rjes;
    }
}
 
void solve(int x, int K){
    s.clear(); m[0].val = 1;
    for (int i = 0; i < v[x].size(); ++i){
        int y = v[x][i].first;
        if (!p[y]){
            dfs(y, 2, v[x][i].second, 1, K); dfs(y, 2, v[x][i].second, 2, K);
        }
    }
    while (!s.empty()){
    	m[s.back()].val = INF; s.pop_back();
	}
	return;
}
 
void decompose(int x, int K){
    cnt = 0; dfs(x, 1, 0, 0, K); cnt = vel[x];
    int root = centr(x); p[root] = 1;
    solve(root, K);
    for (int i = 0; i < v[root].size(); ++i){
        int y = v[root][i].first;
        if (!p[y]) decompose(y, K);
    }
}
 
int best_path(int N, int K, int H[MAXN][2], int L[MAXN]){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
 
    for (int i = 0; i < N - 1; ++i){
        v[H[i][0]].push_back({H[i][1], L[i]});
        v[H[i][1]].push_back({H[i][0], L[i]});
    }
    decompose(0, K);
    if (sol == INF)
        return -1;
    else return (sol - 1);
}

Compilation message

race.cpp: In function 'int dfs(int, int, ll, int, int)':
race.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for (int i = 0; i < v[x].size(); ++i){
      |                     ~~^~~~~~~~~~~~~
race.cpp: In function 'int centr(int)':
race.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |     for (int i = 0; i < v[x].size(); ++i){
      |                     ~~^~~~~~~~~~~~~
race.cpp: In function 'void solve(int, int)':
race.cpp:70:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for (int i = 0; i < v[x].size(); ++i){
      |                     ~~^~~~~~~~~~~~~
race.cpp: In function 'void decompose(int, int)':
race.cpp:86:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |     for (int i = 0; i < v[root].size(); ++i){
      |                     ~~^~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 3 ms 5068 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 3 ms 5068 KB Output is correct
9 Correct 3 ms 5068 KB Output is correct
10 Correct 3 ms 5068 KB Output is correct
11 Correct 2 ms 5068 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 4 ms 5068 KB Output is correct
16 Correct 4 ms 5068 KB Output is correct
17 Correct 3 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 3 ms 5068 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 3 ms 5068 KB Output is correct
9 Correct 3 ms 5068 KB Output is correct
10 Correct 3 ms 5068 KB Output is correct
11 Correct 2 ms 5068 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 4 ms 5068 KB Output is correct
16 Correct 4 ms 5068 KB Output is correct
17 Correct 3 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 4 ms 4940 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 5 ms 5068 KB Output is correct
22 Correct 4 ms 5196 KB Output is correct
23 Correct 4 ms 5196 KB Output is correct
24 Correct 4 ms 5148 KB Output is correct
25 Correct 6 ms 5452 KB Output is correct
26 Correct 4 ms 5196 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 5 ms 5452 KB Output is correct
29 Correct 6 ms 5452 KB Output is correct
30 Correct 6 ms 5496 KB Output is correct
31 Correct 7 ms 5580 KB Output is correct
32 Correct 6 ms 5580 KB Output is correct
33 Correct 6 ms 5580 KB Output is correct
34 Correct 6 ms 5452 KB Output is correct
35 Correct 6 ms 5452 KB Output is correct
36 Correct 5 ms 5452 KB Output is correct
37 Correct 6 ms 5580 KB Output is correct
38 Correct 6 ms 5580 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 3 ms 5068 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 3 ms 5068 KB Output is correct
9 Correct 3 ms 5068 KB Output is correct
10 Correct 3 ms 5068 KB Output is correct
11 Correct 2 ms 5068 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 4 ms 5068 KB Output is correct
16 Correct 4 ms 5068 KB Output is correct
17 Correct 3 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 275 ms 10772 KB Output is correct
20 Correct 240 ms 10608 KB Output is correct
21 Correct 249 ms 11096 KB Output is correct
22 Correct 224 ms 11328 KB Output is correct
23 Correct 153 ms 10876 KB Output is correct
24 Correct 94 ms 10792 KB Output is correct
25 Correct 220 ms 16660 KB Output is correct
26 Correct 173 ms 23232 KB Output is correct
27 Correct 252 ms 16580 KB Output is correct
28 Correct 558 ms 40244 KB Output is correct
29 Correct 555 ms 38340 KB Output is correct
30 Correct 273 ms 16540 KB Output is correct
31 Correct 254 ms 16700 KB Output is correct
32 Correct 326 ms 16612 KB Output is correct
33 Correct 450 ms 15540 KB Output is correct
34 Correct 338 ms 15504 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 3 ms 5068 KB Output is correct
3 Correct 3 ms 5068 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 3 ms 5068 KB Output is correct
8 Correct 3 ms 5068 KB Output is correct
9 Correct 3 ms 5068 KB Output is correct
10 Correct 3 ms 5068 KB Output is correct
11 Correct 2 ms 5068 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 3 ms 5068 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 4 ms 5068 KB Output is correct
16 Correct 4 ms 5068 KB Output is correct
17 Correct 3 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 4 ms 4940 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 5 ms 5068 KB Output is correct
22 Correct 4 ms 5196 KB Output is correct
23 Correct 4 ms 5196 KB Output is correct
24 Correct 4 ms 5148 KB Output is correct
25 Correct 6 ms 5452 KB Output is correct
26 Correct 4 ms 5196 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 5 ms 5452 KB Output is correct
29 Correct 6 ms 5452 KB Output is correct
30 Correct 6 ms 5496 KB Output is correct
31 Correct 7 ms 5580 KB Output is correct
32 Correct 6 ms 5580 KB Output is correct
33 Correct 6 ms 5580 KB Output is correct
34 Correct 6 ms 5452 KB Output is correct
35 Correct 6 ms 5452 KB Output is correct
36 Correct 5 ms 5452 KB Output is correct
37 Correct 6 ms 5580 KB Output is correct
38 Correct 6 ms 5580 KB Output is correct
39 Correct 275 ms 10772 KB Output is correct
40 Correct 240 ms 10608 KB Output is correct
41 Correct 249 ms 11096 KB Output is correct
42 Correct 224 ms 11328 KB Output is correct
43 Correct 153 ms 10876 KB Output is correct
44 Correct 94 ms 10792 KB Output is correct
45 Correct 220 ms 16660 KB Output is correct
46 Correct 173 ms 23232 KB Output is correct
47 Correct 252 ms 16580 KB Output is correct
48 Correct 558 ms 40244 KB Output is correct
49 Correct 555 ms 38340 KB Output is correct
50 Correct 273 ms 16540 KB Output is correct
51 Correct 254 ms 16700 KB Output is correct
52 Correct 326 ms 16612 KB Output is correct
53 Correct 450 ms 15540 KB Output is correct
54 Correct 338 ms 15504 KB Output is correct
55 Correct 35 ms 5836 KB Output is correct
56 Correct 18 ms 5728 KB Output is correct
57 Correct 191 ms 11504 KB Output is correct
58 Correct 59 ms 11820 KB Output is correct
59 Correct 491 ms 30776 KB Output is correct
60 Correct 1697 ms 70440 KB Output is correct
61 Correct 428 ms 17092 KB Output is correct
62 Correct 405 ms 17768 KB Output is correct
63 Correct 541 ms 17892 KB Output is correct
64 Correct 2875 ms 36232 KB Output is correct
65 Correct 389 ms 16436 KB Output is correct
66 Correct 2106 ms 46976 KB Output is correct
67 Correct 154 ms 18484 KB Output is correct
68 Correct 1149 ms 36864 KB Output is correct
69 Correct 1142 ms 37064 KB Output is correct
70 Correct 1148 ms 35844 KB Output is correct