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답안 #728458

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
728458 2023-04-22T12:39:12 Z Rasoul006 꿈 (IOI13_dreaming) C++17
24 / 100
 104 ms 37084 KB 
#include "dreaming.h"

#include <bits/stdc++.h>

#define endl "\n"

#define F first

#define S second

#define pb push_back

typedef long long ll;

using namespace std;

const int N = 1e6+5;

const long long oo = 1e18 ;

vector <pair <ll,ll>> v[N] ;

ll n , m , ans , best , mx , dis[N] , len ;

bool vis[N] ;

void dfs (ll u , ll p , ll cost)
{
    dis[u] = cost ;
    vis[u] = true ;
    for (auto it : v[u])
    {
        if (it.F != p)
            dfs(it.F , u , cost + it.S);
    }
}

bool dfs2 (ll u , ll p , ll cost , ll gol)
{
    bool is = false ;

    for (auto it : v[u])
    {
        if (it.F != p)
            is |= dfs2(it.F , u , cost + it.S , gol) ;
    }

    is |= (u == gol);

    if (is)
        best = min (best , max(cost , len-cost));

    return is ;
}

ll p1 , p2 ;

ll far (ll p)
{
    mx = 0 ; ll ret ;

    for (int i = 1 ; i<=n ; i++)
        dis[i] = 0 ;

    dfs(p , p , 0) ;

    for (int i = 1 ; i<=n ; i++)
    {
        if (dis[i] >= mx)
            ret = i , mx = dis[i] ;
        dis[i] = 0 ;
    }

    return ret ;
}

ll get (ll p)
{
    p1 = far(p);
    p2 = far(p1);
    len = mx ;

    best = oo ;
    dfs2(p1 , p1 , 0 , p2) ;
    return best ;
}


int travelTime(int N, int M, int L, int A[], int B[], int T[])
{
    n = N ; m = M ;

    for (int i = 0 ; i<m ; i++)
    {
        v[B[i]].pb({A[i] , T[i]});
        v[A[i]].pb({B[i] , T[i]});
    }

    ans += get(1) ;

    ll bans = len ;

    for (int i = 1 ; i<=n ; i++)
    {
        if (!vis[i])
        {
            ans += get(i) ;
            break ;
        }
    }

    bans = max(bans , len) ;

    return max(bans , ans + L) ;
}

Compilation message

dreaming.cpp: In function 'll far(ll)':
dreaming.cpp:75:12: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
   75 |     return ret ;
      |            ^~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 55 ms 37060 KB Output is correct
2 Correct 55 ms 37072 KB Output is correct
3 Correct 40 ms 32404 KB Output is correct
4 Correct 18 ms 25684 KB Output is correct
5 Correct 18 ms 24972 KB Output is correct
6 Correct 23 ms 26884 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 38 ms 28616 KB Output is correct
9 Correct 51 ms 30520 KB Output is correct
10 Correct 13 ms 23796 KB Output is correct
11 Correct 57 ms 32604 KB Output is correct
12 Correct 71 ms 34872 KB Output is correct
13 Correct 13 ms 23892 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 13 ms 23768 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 13 ms 23688 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23820 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 12 ms 23764 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 12 ms 23764 KB Output is correct
16 Correct 13 ms 23724 KB Output is correct
17 Correct 12 ms 23824 KB Output is correct
18 Correct 12 ms 23756 KB Output is correct
19 Correct 13 ms 23764 KB Output is correct
20 Correct 12 ms 23764 KB Output is correct
21 Correct 13 ms 23828 KB Output is correct
22 Correct 12 ms 23764 KB Output is correct
23 Correct 12 ms 23720 KB Output is correct
24 Correct 15 ms 23804 KB Output is correct
25 Correct 13 ms 23812 KB Output is correct

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 55 ms 37060 KB Output is correct
2 Correct 55 ms 37072 KB Output is correct
3 Correct 40 ms 32404 KB Output is correct
4 Correct 18 ms 25684 KB Output is correct
5 Correct 18 ms 24972 KB Output is correct
6 Correct 23 ms 26884 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 38 ms 28616 KB Output is correct
9 Correct 51 ms 30520 KB Output is correct
10 Correct 13 ms 23796 KB Output is correct
11 Correct 57 ms 32604 KB Output is correct
12 Correct 71 ms 34872 KB Output is correct
13 Correct 13 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 13 ms 23768 KB Output is correct
16 Correct 13 ms 23764 KB Output is correct
17 Correct 12 ms 23764 KB Output is correct
18 Correct 13 ms 23688 KB Output is correct
19 Correct 13 ms 23764 KB Output is correct
20 Correct 13 ms 23764 KB Output is correct
21 Correct 13 ms 23820 KB Output is correct
22 Correct 13 ms 23764 KB Output is correct
23 Correct 13 ms 23764 KB Output is correct
24 Correct 13 ms 23764 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 12 ms 23764 KB Output is correct
27 Correct 12 ms 23764 KB Output is correct
28 Correct 12 ms 23764 KB Output is correct
29 Correct 13 ms 23724 KB Output is correct
30 Correct 12 ms 23824 KB Output is correct
31 Correct 12 ms 23756 KB Output is correct
32 Correct 13 ms 23764 KB Output is correct
33 Correct 12 ms 23764 KB Output is correct
34 Correct 13 ms 23828 KB Output is correct
35 Correct 12 ms 23764 KB Output is correct
36 Correct 12 ms 23720 KB Output is correct
37 Correct 15 ms 23804 KB Output is correct
38 Correct 13 ms 23812 KB Output is correct
39 Correct 57 ms 37084 KB Output is correct
40 Correct 56 ms 37052 KB Output is correct
41 Correct 42 ms 32496 KB Output is correct
42 Correct 18 ms 25660 KB Output is correct
43 Correct 13 ms 23764 KB Output is correct
44 Correct 13 ms 23764 KB Output is correct
45 Correct 13 ms 23764 KB Output is correct
46 Correct 12 ms 23764 KB Output is correct
47 Correct 13 ms 23816 KB Output is correct
48 Correct 12 ms 23748 KB Output is correct
49 Correct 14 ms 23792 KB Output is correct
50 Correct 12 ms 23816 KB Output is correct
51 Correct 14 ms 23772 KB Output is correct
52 Correct 14 ms 23764 KB Output is correct
53 Correct 15 ms 23740 KB Output is correct
54 Correct 12 ms 23764 KB Output is correct
55 Correct 14 ms 23764 KB Output is correct
56 Correct 12 ms 23752 KB Output is correct
57 Correct 81 ms 31692 KB Output is correct
58 Correct 104 ms 31720 KB Output is correct
59 Correct 81 ms 31404 KB Output is correct
60 Correct 81 ms 31452 KB Output is correct
61 Correct 84 ms 31244 KB Output is correct
62 Correct 81 ms 31264 KB Output is correct
63 Incorrect 78 ms 30992 KB Output isn't correct
64 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 26 ms 26832 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 13 ms 23768 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 13 ms 23688 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23820 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 12 ms 23764 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 12 ms 23764 KB Output is correct
16 Correct 13 ms 23724 KB Output is correct
17 Correct 12 ms 23824 KB Output is correct
18 Correct 12 ms 23756 KB Output is correct
19 Correct 13 ms 23764 KB Output is correct
20 Correct 12 ms 23764 KB Output is correct
21 Correct 13 ms 23828 KB Output is correct
22 Correct 12 ms 23764 KB Output is correct
23 Correct 12 ms 23720 KB Output is correct
24 Correct 15 ms 23804 KB Output is correct
25 Correct 13 ms 23812 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Incorrect 14 ms 23936 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 55 ms 37060 KB Output is correct
2 Correct 55 ms 37072 KB Output is correct
3 Correct 40 ms 32404 KB Output is correct
4 Correct 18 ms 25684 KB Output is correct
5 Correct 18 ms 24972 KB Output is correct
6 Correct 23 ms 26884 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 38 ms 28616 KB Output is correct
9 Correct 51 ms 30520 KB Output is correct
10 Correct 13 ms 23796 KB Output is correct
11 Correct 57 ms 32604 KB Output is correct
12 Correct 71 ms 34872 KB Output is correct
13 Correct 13 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 13 ms 23768 KB Output is correct
16 Correct 13 ms 23764 KB Output is correct
17 Correct 12 ms 23764 KB Output is correct
18 Correct 13 ms 23688 KB Output is correct
19 Correct 13 ms 23764 KB Output is correct
20 Correct 13 ms 23764 KB Output is correct
21 Correct 13 ms 23820 KB Output is correct
22 Correct 13 ms 23764 KB Output is correct
23 Correct 13 ms 23764 KB Output is correct
24 Correct 13 ms 23764 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 12 ms 23764 KB Output is correct
27 Correct 12 ms 23764 KB Output is correct
28 Correct 12 ms 23764 KB Output is correct
29 Correct 13 ms 23724 KB Output is correct
30 Correct 12 ms 23824 KB Output is correct
31 Correct 12 ms 23756 KB Output is correct
32 Correct 13 ms 23764 KB Output is correct
33 Correct 12 ms 23764 KB Output is correct
34 Correct 13 ms 23828 KB Output is correct
35 Correct 12 ms 23764 KB Output is correct
36 Correct 12 ms 23720 KB Output is correct
37 Correct 15 ms 23804 KB Output is correct
38 Correct 13 ms 23812 KB Output is correct
39 Correct 57 ms 37084 KB Output is correct
40 Correct 56 ms 37052 KB Output is correct
41 Correct 42 ms 32496 KB Output is correct
42 Correct 18 ms 25660 KB Output is correct
43 Correct 13 ms 23764 KB Output is correct
44 Correct 13 ms 23764 KB Output is correct
45 Correct 13 ms 23764 KB Output is correct
46 Correct 12 ms 23764 KB Output is correct
47 Correct 13 ms 23816 KB Output is correct
48 Correct 12 ms 23748 KB Output is correct
49 Correct 14 ms 23792 KB Output is correct
50 Correct 12 ms 23816 KB Output is correct
51 Correct 14 ms 23772 KB Output is correct
52 Correct 14 ms 23764 KB Output is correct
53 Correct 15 ms 23740 KB Output is correct
54 Correct 12 ms 23764 KB Output is correct
55 Correct 14 ms 23764 KB Output is correct
56 Correct 12 ms 23752 KB Output is correct
57 Correct 81 ms 31692 KB Output is correct
58 Correct 104 ms 31720 KB Output is correct
59 Correct 81 ms 31404 KB Output is correct
60 Correct 81 ms 31452 KB Output is correct
61 Correct 84 ms 31244 KB Output is correct
62 Correct 81 ms 31264 KB Output is correct
63 Incorrect 78 ms 30992 KB Output isn't correct
64 Halted 0 ms 0 KB -