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답안 #728460

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
728460 2023-04-22T12:43:45 Z Rasoul006 꿈 (IOI13_dreaming) C++17
24 / 100
 104 ms 37212 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] = -1 ;

    dfs(p , p , 0) ;

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

    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:74:12: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
   74 |     return ret ;
      |            ^~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 59 ms 37212 KB Output is correct
2 Correct 60 ms 37004 KB Output is correct
3 Correct 39 ms 32508 KB Output is correct
4 Correct 19 ms 25684 KB Output is correct
5 Correct 18 ms 25004 KB Output is correct
6 Correct 28 ms 26824 KB Output is correct
7 Correct 13 ms 23768 KB Output is correct
8 Correct 49 ms 28624 KB Output is correct
9 Correct 56 ms 30576 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 68 ms 32528 KB Output is correct
12 Correct 83 ms 34904 KB Output is correct
13 Correct 14 ms 23840 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23820 KB Output is correct
2 Correct 14 ms 23792 KB Output is correct
3 Correct 13 ms 23708 KB Output is correct
4 Correct 13 ms 23800 KB Output is correct
5 Correct 13 ms 23824 KB Output is correct
6 Correct 17 ms 23756 KB Output is correct
7 Correct 16 ms 23772 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 15 ms 23764 KB Output is correct
10 Correct 15 ms 23764 KB Output is correct
11 Correct 12 ms 23760 KB Output is correct
12 Correct 14 ms 23792 KB Output is correct
13 Correct 13 ms 23764 KB Output is correct
14 Correct 13 ms 23812 KB Output is correct
15 Correct 14 ms 23788 KB Output is correct
16 Correct 16 ms 23776 KB Output is correct
17 Correct 14 ms 23764 KB Output is correct
18 Correct 14 ms 23792 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Correct 14 ms 23764 KB Output is correct
21 Correct 14 ms 23824 KB Output is correct
22 Correct 15 ms 23764 KB Output is correct
23 Correct 13 ms 23784 KB Output is correct
24 Correct 12 ms 23792 KB Output is correct
25 Correct 14 ms 23820 KB Output is correct

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 59 ms 37212 KB Output is correct
2 Correct 60 ms 37004 KB Output is correct
3 Correct 39 ms 32508 KB Output is correct
4 Correct 19 ms 25684 KB Output is correct
5 Correct 18 ms 25004 KB Output is correct
6 Correct 28 ms 26824 KB Output is correct
7 Correct 13 ms 23768 KB Output is correct
8 Correct 49 ms 28624 KB Output is correct
9 Correct 56 ms 30576 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 68 ms 32528 KB Output is correct
12 Correct 83 ms 34904 KB Output is correct
13 Correct 14 ms 23840 KB Output is correct
14 Correct 13 ms 23820 KB Output is correct
15 Correct 14 ms 23792 KB Output is correct
16 Correct 13 ms 23708 KB Output is correct
17 Correct 13 ms 23800 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 17 ms 23756 KB Output is correct
20 Correct 16 ms 23772 KB Output is correct
21 Correct 13 ms 23764 KB Output is correct
22 Correct 15 ms 23764 KB Output is correct
23 Correct 15 ms 23764 KB Output is correct
24 Correct 12 ms 23760 KB Output is correct
25 Correct 14 ms 23792 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23812 KB Output is correct
28 Correct 14 ms 23788 KB Output is correct
29 Correct 16 ms 23776 KB Output is correct
30 Correct 14 ms 23764 KB Output is correct
31 Correct 14 ms 23792 KB Output is correct
32 Correct 12 ms 23764 KB Output is correct
33 Correct 14 ms 23764 KB Output is correct
34 Correct 14 ms 23824 KB Output is correct
35 Correct 15 ms 23764 KB Output is correct
36 Correct 13 ms 23784 KB Output is correct
37 Correct 12 ms 23792 KB Output is correct
38 Correct 14 ms 23820 KB Output is correct
39 Correct 67 ms 36964 KB Output is correct
40 Correct 57 ms 36972 KB Output is correct
41 Correct 42 ms 32460 KB Output is correct
42 Correct 18 ms 25768 KB Output is correct
43 Correct 13 ms 23816 KB Output is correct
44 Correct 13 ms 23764 KB Output is correct
45 Correct 17 ms 23696 KB Output is correct
46 Correct 13 ms 23820 KB Output is correct
47 Correct 14 ms 23824 KB Output is correct
48 Correct 13 ms 23712 KB Output is correct
49 Correct 13 ms 23764 KB Output is correct
50 Correct 12 ms 23784 KB Output is correct
51 Correct 13 ms 23720 KB Output is correct
52 Correct 13 ms 23764 KB Output is correct
53 Correct 13 ms 23716 KB Output is correct
54 Correct 14 ms 23764 KB Output is correct
55 Correct 15 ms 23756 KB Output is correct
56 Correct 14 ms 23764 KB Output is correct
57 Correct 93 ms 31816 KB Output is correct
58 Correct 80 ms 31692 KB Output is correct
59 Correct 104 ms 31408 KB Output is correct
60 Correct 84 ms 31416 KB Output is correct
61 Correct 75 ms 31172 KB Output is correct
62 Correct 78 ms 31276 KB Output is correct
63 Incorrect 71 ms 30976 KB Output isn't correct
64 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 25 ms 26836 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23820 KB Output is correct
2 Correct 14 ms 23792 KB Output is correct
3 Correct 13 ms 23708 KB Output is correct
4 Correct 13 ms 23800 KB Output is correct
5 Correct 13 ms 23824 KB Output is correct
6 Correct 17 ms 23756 KB Output is correct
7 Correct 16 ms 23772 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 15 ms 23764 KB Output is correct
10 Correct 15 ms 23764 KB Output is correct
11 Correct 12 ms 23760 KB Output is correct
12 Correct 14 ms 23792 KB Output is correct
13 Correct 13 ms 23764 KB Output is correct
14 Correct 13 ms 23812 KB Output is correct
15 Correct 14 ms 23788 KB Output is correct
16 Correct 16 ms 23776 KB Output is correct
17 Correct 14 ms 23764 KB Output is correct
18 Correct 14 ms 23792 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Correct 14 ms 23764 KB Output is correct
21 Correct 14 ms 23824 KB Output is correct
22 Correct 15 ms 23764 KB Output is correct
23 Correct 13 ms 23784 KB Output is correct
24 Correct 12 ms 23792 KB Output is correct
25 Correct 14 ms 23820 KB Output is correct
26 Correct 13 ms 23872 KB Output is correct
27 Incorrect 13 ms 23888 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 59 ms 37212 KB Output is correct
2 Correct 60 ms 37004 KB Output is correct
3 Correct 39 ms 32508 KB Output is correct
4 Correct 19 ms 25684 KB Output is correct
5 Correct 18 ms 25004 KB Output is correct
6 Correct 28 ms 26824 KB Output is correct
7 Correct 13 ms 23768 KB Output is correct
8 Correct 49 ms 28624 KB Output is correct
9 Correct 56 ms 30576 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 68 ms 32528 KB Output is correct
12 Correct 83 ms 34904 KB Output is correct
13 Correct 14 ms 23840 KB Output is correct
14 Correct 13 ms 23820 KB Output is correct
15 Correct 14 ms 23792 KB Output is correct
16 Correct 13 ms 23708 KB Output is correct
17 Correct 13 ms 23800 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 17 ms 23756 KB Output is correct
20 Correct 16 ms 23772 KB Output is correct
21 Correct 13 ms 23764 KB Output is correct
22 Correct 15 ms 23764 KB Output is correct
23 Correct 15 ms 23764 KB Output is correct
24 Correct 12 ms 23760 KB Output is correct
25 Correct 14 ms 23792 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23812 KB Output is correct
28 Correct 14 ms 23788 KB Output is correct
29 Correct 16 ms 23776 KB Output is correct
30 Correct 14 ms 23764 KB Output is correct
31 Correct 14 ms 23792 KB Output is correct
32 Correct 12 ms 23764 KB Output is correct
33 Correct 14 ms 23764 KB Output is correct
34 Correct 14 ms 23824 KB Output is correct
35 Correct 15 ms 23764 KB Output is correct
36 Correct 13 ms 23784 KB Output is correct
37 Correct 12 ms 23792 KB Output is correct
38 Correct 14 ms 23820 KB Output is correct
39 Correct 67 ms 36964 KB Output is correct
40 Correct 57 ms 36972 KB Output is correct
41 Correct 42 ms 32460 KB Output is correct
42 Correct 18 ms 25768 KB Output is correct
43 Correct 13 ms 23816 KB Output is correct
44 Correct 13 ms 23764 KB Output is correct
45 Correct 17 ms 23696 KB Output is correct
46 Correct 13 ms 23820 KB Output is correct
47 Correct 14 ms 23824 KB Output is correct
48 Correct 13 ms 23712 KB Output is correct
49 Correct 13 ms 23764 KB Output is correct
50 Correct 12 ms 23784 KB Output is correct
51 Correct 13 ms 23720 KB Output is correct
52 Correct 13 ms 23764 KB Output is correct
53 Correct 13 ms 23716 KB Output is correct
54 Correct 14 ms 23764 KB Output is correct
55 Correct 15 ms 23756 KB Output is correct
56 Correct 14 ms 23764 KB Output is correct
57 Correct 93 ms 31816 KB Output is correct
58 Correct 80 ms 31692 KB Output is correct
59 Correct 104 ms 31408 KB Output is correct
60 Correct 84 ms 31416 KB Output is correct
61 Correct 75 ms 31172 KB Output is correct
62 Correct 78 ms 31276 KB Output is correct
63 Incorrect 71 ms 30976 KB Output isn't correct
64 Halted 0 ms 0 KB -