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답안 #728456

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
728456 2023-04-22T12:36:44 Z Rasoul006 꿈 (IOI13_dreaming) C++17
24 / 100
 96 ms 37068 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 75 ms 37068 KB Output is correct
2 Correct 60 ms 36944 KB Output is correct
3 Correct 50 ms 32464 KB Output is correct
4 Correct 18 ms 25732 KB Output is correct
5 Correct 24 ms 24924 KB Output is correct
6 Correct 33 ms 26828 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 33 ms 28536 KB Output is correct
9 Correct 44 ms 30520 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 61 ms 32616 KB Output is correct
12 Correct 68 ms 34972 KB Output is correct
13 Correct 14 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 23764 KB Output is correct
3 Correct 15 ms 23764 KB Output is correct
4 Correct 13 ms 23764 KB Output is correct
5 Correct 14 ms 23764 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23800 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 12 ms 23692 KB Output is correct
12 Correct 12 ms 23764 KB Output is correct
13 Correct 14 ms 23696 KB Output is correct
14 Correct 13 ms 23792 KB Output is correct
15 Correct 16 ms 23764 KB Output is correct
16 Correct 13 ms 23756 KB Output is correct
17 Correct 15 ms 23764 KB Output is correct
18 Correct 13 ms 23764 KB Output is correct
19 Correct 12 ms 23772 KB Output is correct
20 Correct 12 ms 23736 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 14 ms 23712 KB Output is correct
23 Correct 13 ms 23748 KB Output is correct
24 Correct 13 ms 23764 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 37068 KB Output is correct
2 Correct 60 ms 36944 KB Output is correct
3 Correct 50 ms 32464 KB Output is correct
4 Correct 18 ms 25732 KB Output is correct
5 Correct 24 ms 24924 KB Output is correct
6 Correct 33 ms 26828 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 33 ms 28536 KB Output is correct
9 Correct 44 ms 30520 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 61 ms 32616 KB Output is correct
12 Correct 68 ms 34972 KB Output is correct
13 Correct 14 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 13 ms 23764 KB Output is correct
16 Correct 15 ms 23764 KB Output is correct
17 Correct 13 ms 23764 KB Output is correct
18 Correct 14 ms 23764 KB Output is correct
19 Correct 13 ms 23764 KB Output is correct
20 Correct 12 ms 23800 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 13 ms 23764 KB Output is correct
23 Correct 12 ms 23764 KB Output is correct
24 Correct 12 ms 23692 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 14 ms 23696 KB Output is correct
27 Correct 13 ms 23792 KB Output is correct
28 Correct 16 ms 23764 KB Output is correct
29 Correct 13 ms 23756 KB Output is correct
30 Correct 15 ms 23764 KB Output is correct
31 Correct 13 ms 23764 KB Output is correct
32 Correct 12 ms 23772 KB Output is correct
33 Correct 12 ms 23736 KB Output is correct
34 Correct 12 ms 23764 KB Output is correct
35 Correct 14 ms 23712 KB Output is correct
36 Correct 13 ms 23748 KB Output is correct
37 Correct 13 ms 23764 KB Output is correct
38 Correct 12 ms 23764 KB Output is correct
39 Correct 69 ms 36980 KB Output is correct
40 Correct 59 ms 37056 KB Output is correct
41 Correct 44 ms 32420 KB Output is correct
42 Correct 18 ms 25760 KB Output is correct
43 Correct 13 ms 23852 KB Output is correct
44 Correct 14 ms 23716 KB Output is correct
45 Correct 12 ms 23780 KB Output is correct
46 Correct 14 ms 23752 KB Output is correct
47 Correct 13 ms 23768 KB Output is correct
48 Correct 16 ms 23784 KB Output is correct
49 Correct 13 ms 23764 KB Output is correct
50 Correct 12 ms 23816 KB Output is correct
51 Correct 12 ms 23764 KB Output is correct
52 Correct 13 ms 23792 KB Output is correct
53 Correct 13 ms 23788 KB Output is correct
54 Correct 13 ms 23800 KB Output is correct
55 Correct 15 ms 23740 KB Output is correct
56 Correct 13 ms 23764 KB Output is correct
57 Correct 87 ms 31820 KB Output is correct
58 Correct 75 ms 31720 KB Output is correct
59 Correct 92 ms 31528 KB Output is correct
60 Correct 92 ms 31436 KB Output is correct
61 Correct 71 ms 31236 KB Output is correct
62 Correct 96 ms 31320 KB Output is correct
63 Incorrect 86 ms 31000 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 26796 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 23764 KB Output is correct
3 Correct 15 ms 23764 KB Output is correct
4 Correct 13 ms 23764 KB Output is correct
5 Correct 14 ms 23764 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23800 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 12 ms 23692 KB Output is correct
12 Correct 12 ms 23764 KB Output is correct
13 Correct 14 ms 23696 KB Output is correct
14 Correct 13 ms 23792 KB Output is correct
15 Correct 16 ms 23764 KB Output is correct
16 Correct 13 ms 23756 KB Output is correct
17 Correct 15 ms 23764 KB Output is correct
18 Correct 13 ms 23764 KB Output is correct
19 Correct 12 ms 23772 KB Output is correct
20 Correct 12 ms 23736 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 14 ms 23712 KB Output is correct
23 Correct 13 ms 23748 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 23824 KB Output is correct
27 Incorrect 13 ms 23892 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 37068 KB Output is correct
2 Correct 60 ms 36944 KB Output is correct
3 Correct 50 ms 32464 KB Output is correct
4 Correct 18 ms 25732 KB Output is correct
5 Correct 24 ms 24924 KB Output is correct
6 Correct 33 ms 26828 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 33 ms 28536 KB Output is correct
9 Correct 44 ms 30520 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 61 ms 32616 KB Output is correct
12 Correct 68 ms 34972 KB Output is correct
13 Correct 14 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 13 ms 23764 KB Output is correct
16 Correct 15 ms 23764 KB Output is correct
17 Correct 13 ms 23764 KB Output is correct
18 Correct 14 ms 23764 KB Output is correct
19 Correct 13 ms 23764 KB Output is correct
20 Correct 12 ms 23800 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 13 ms 23764 KB Output is correct
23 Correct 12 ms 23764 KB Output is correct
24 Correct 12 ms 23692 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 14 ms 23696 KB Output is correct
27 Correct 13 ms 23792 KB Output is correct
28 Correct 16 ms 23764 KB Output is correct
29 Correct 13 ms 23756 KB Output is correct
30 Correct 15 ms 23764 KB Output is correct
31 Correct 13 ms 23764 KB Output is correct
32 Correct 12 ms 23772 KB Output is correct
33 Correct 12 ms 23736 KB Output is correct
34 Correct 12 ms 23764 KB Output is correct
35 Correct 14 ms 23712 KB Output is correct
36 Correct 13 ms 23748 KB Output is correct
37 Correct 13 ms 23764 KB Output is correct
38 Correct 12 ms 23764 KB Output is correct
39 Correct 69 ms 36980 KB Output is correct
40 Correct 59 ms 37056 KB Output is correct
41 Correct 44 ms 32420 KB Output is correct
42 Correct 18 ms 25760 KB Output is correct
43 Correct 13 ms 23852 KB Output is correct
44 Correct 14 ms 23716 KB Output is correct
45 Correct 12 ms 23780 KB Output is correct
46 Correct 14 ms 23752 KB Output is correct
47 Correct 13 ms 23768 KB Output is correct
48 Correct 16 ms 23784 KB Output is correct
49 Correct 13 ms 23764 KB Output is correct
50 Correct 12 ms 23816 KB Output is correct
51 Correct 12 ms 23764 KB Output is correct
52 Correct 13 ms 23792 KB Output is correct
53 Correct 13 ms 23788 KB Output is correct
54 Correct 13 ms 23800 KB Output is correct
55 Correct 15 ms 23740 KB Output is correct
56 Correct 13 ms 23764 KB Output is correct
57 Correct 87 ms 31820 KB Output is correct
58 Correct 75 ms 31720 KB Output is correct
59 Correct 92 ms 31528 KB Output is correct
60 Correct 92 ms 31436 KB Output is correct
61 Correct 71 ms 31236 KB Output is correct
62 Correct 96 ms 31320 KB Output is correct
63 Incorrect 86 ms 31000 KB Output isn't correct
64 Halted 0 ms 0 KB -