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답안 #167992

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
167992 2019-12-11T06:31:38 Z davitmarg 꿈 (IOI13_dreaming) C++17
32 / 100
 201 ms 26232 KB 
/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <set>
#include <queue>
#include <iomanip>
#include <bitset>
#include <stack>
#include <cassert>
#include <iterator>
#include <fstream>
#define mod 1000000000ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(), v.end()
using namespace std;

const int N = 100005;

#ifndef death
#include "dreaming.h"
#endif

int n, used[N];
LL x, ans[N], mx[N];
vector<pair<int, LL>> g[N];
vector<LL> dp[N];

void dfs(int v)
{
    used[v] = 1;
    dp[v].PB(0);
    dp[v].PB(0);
    for (int i = 0; i < g[v].size(); i++)
    {
        int to = g[v][i].first;
        LL d = g[v][i].second;
        if (used[to])
            continue;
        dfs(to);
        dp[v].PB(dp[to][0] + d);
        mx[v] = max(mx[v], mx[to]);
    }
    sort(all(dp[v]));
    reverse(all(dp[v]));
    mx[v] = dp[v][0] + dp[v][1];
}

void dfs2(int v, int p, LL dist)
{
    vector<LL> d;
    d.PB(dp[v][0]);
    d.PB(dp[v][1]);
    d.PB(dist);
    sort(all(d));
    reverse(all(d));
    ans[v] = max(d[0], d[1]);

    for (int i = 0; i < g[v].size(); i++)
    {
        int to = g[v][i].first;
        LL d = g[v][i].second;
        if (to == p)
            continue;
        LL newdist = dist;

        if (dp[to][0] + d == dp[v][0])
            newdist = max(newdist, dp[v][1]);
        else
            newdist = max(newdist, dp[v][0]);

        newdist += d;
        mx[to] = mx[v];
        dfs2(to, v, newdist);
        ans[v] = min(ans[v], ans[to]);
    }
}

int travelTime(int N, int M, int L, int A[], int B[], int T[])
{
    LL ANS = 0;
    n = N;
    x = L;
    while (M--)
    {
        g[A[M]].PB(MP(B[M], T[M]));
        g[B[M]].PB(MP(A[M], T[M]));
    }
    vector<LL> res;
    for (int i = 0; i < n; i++)
    {
        if (used[i])
            continue;
        dfs(i);
        ANS = max(ANS, mx[i]);
        dfs2(i, -1, 0);
        //cout << ans[i] << " !\n";
        res.PB(ans[i]);
    }
    sort(all(res));
    reverse(all(res));
    if (res.size() > 1)
    {
        ANS = max(x + res[0] + res[1], ANS);
        if (res.size() > 2)
            ANS = max(ANS, res[1] + res[2] + x + x);
    }
    return ANS;
}

#ifdef death

int main()
{
    int N, M, L, A[102], B[102], D[102];
    cin >> N >> M >> L;
    for (int i = 0; i < M; i++)
        cin >> A[i] >> B[i] >> D[i];
    cout << travelTime(N, M, L, A, B, D) << endl;
    return 0;
}

#endif

/*


7 5 1
0 1 5
1 2 3
2 3 2
1 4 4
4 5 2

8 6 100
0 1 10
1 2 15
2 7 11
3 4 3
4 5 332
5 6 3

12 8 2 
0 8 4
8 2 2
2 7 4
5 11 3
5 1 7
1 3 1
1 9 5
10 6 3

*/

Compilation message

dreaming.cpp: In function 'void dfs(int)':
dreaming.cpp:42:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < g[v].size(); i++)
                     ~~^~~~~~~~~~~~~
dreaming.cpp: In function 'void dfs2(int, int, long long int)':
dreaming.cpp:67:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < g[v].size(); i++)
                     ~~^~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 140 ms 26232 KB Output is correct
2 Correct 149 ms 25592 KB Output is correct
3 Correct 93 ms 22264 KB Output is correct
4 Correct 26 ms 8184 KB Output is correct
5 Correct 19 ms 6904 KB Output is correct
6 Correct 33 ms 9748 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 63 ms 14140 KB Output is correct
9 Correct 89 ms 18524 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 201 ms 20088 KB Output is correct
12 Correct 156 ms 23160 KB Output is correct
13 Correct 7 ms 5312 KB Output is correct

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 140 ms 26232 KB Output is correct
2 Correct 149 ms 25592 KB Output is correct
3 Correct 93 ms 22264 KB Output is correct
4 Correct 26 ms 8184 KB Output is correct
5 Correct 19 ms 6904 KB Output is correct
6 Correct 33 ms 9748 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 63 ms 14140 KB Output is correct
9 Correct 89 ms 18524 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 201 ms 20088 KB Output is correct
12 Correct 156 ms 23160 KB Output is correct
13 Correct 7 ms 5312 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 6 ms 5112 KB Output is correct
16 Correct 6 ms 4984 KB Output is correct
17 Correct 6 ms 4984 KB Output is correct
18 Correct 6 ms 4984 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 4984 KB Output is correct
21 Correct 6 ms 5116 KB Output is correct
22 Incorrect 6 ms 5112 KB Output isn't correct
23 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 140 ms 26232 KB Output is correct
2 Correct 149 ms 25592 KB Output is correct
3 Correct 93 ms 22264 KB Output is correct
4 Correct 26 ms 8184 KB Output is correct
5 Correct 19 ms 6904 KB Output is correct
6 Correct 33 ms 9748 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 63 ms 14140 KB Output is correct
9 Correct 89 ms 18524 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 201 ms 20088 KB Output is correct
12 Correct 156 ms 23160 KB Output is correct
13 Correct 7 ms 5312 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 6 ms 5112 KB Output is correct
16 Correct 6 ms 4984 KB Output is correct
17 Correct 6 ms 4984 KB Output is correct
18 Correct 6 ms 4984 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 4984 KB Output is correct
21 Correct 6 ms 5116 KB Output is correct
22 Incorrect 6 ms 5112 KB Output isn't correct
23 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 13580 KB Output is correct
2 Correct 74 ms 13512 KB Output is correct
3 Correct 75 ms 13524 KB Output is correct
4 Correct 71 ms 13552 KB Output is correct
5 Correct 75 ms 13552 KB Output is correct
6 Correct 75 ms 14468 KB Output is correct
7 Correct 76 ms 13936 KB Output is correct
8 Correct 69 ms 13404 KB Output is correct
9 Correct 66 ms 13296 KB Output is correct
10 Correct 77 ms 13816 KB Output is correct
11 Correct 6 ms 4984 KB Output is correct
12 Correct 40 ms 10960 KB Output is correct
13 Correct 41 ms 11004 KB Output is correct
14 Correct 39 ms 10856 KB Output is correct
15 Correct 40 ms 11112 KB Output is correct
16 Correct 40 ms 10860 KB Output is correct
17 Correct 40 ms 10924 KB Output is correct
18 Correct 40 ms 10988 KB Output is correct
19 Correct 40 ms 10984 KB Output is correct
20 Correct 6 ms 4984 KB Output is correct
21 Correct 6 ms 5112 KB Output is correct
22 Correct 7 ms 5240 KB Output is correct
23 Correct 40 ms 10860 KB Output is correct

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 140 ms 26232 KB Output is correct
2 Correct 149 ms 25592 KB Output is correct
3 Correct 93 ms 22264 KB Output is correct
4 Correct 26 ms 8184 KB Output is correct
5 Correct 19 ms 6904 KB Output is correct
6 Correct 33 ms 9748 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 63 ms 14140 KB Output is correct
9 Correct 89 ms 18524 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 201 ms 20088 KB Output is correct
12 Correct 156 ms 23160 KB Output is correct
13 Correct 7 ms 5312 KB Output is correct
14 Incorrect 7 ms 5240 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 140 ms 26232 KB Output is correct
2 Correct 149 ms 25592 KB Output is correct
3 Correct 93 ms 22264 KB Output is correct
4 Correct 26 ms 8184 KB Output is correct
5 Correct 19 ms 6904 KB Output is correct
6 Correct 33 ms 9748 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 63 ms 14140 KB Output is correct
9 Correct 89 ms 18524 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 201 ms 20088 KB Output is correct
12 Correct 156 ms 23160 KB Output is correct
13 Correct 7 ms 5312 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 6 ms 5112 KB Output is correct
16 Correct 6 ms 4984 KB Output is correct
17 Correct 6 ms 4984 KB Output is correct
18 Correct 6 ms 4984 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 4984 KB Output is correct
21 Correct 6 ms 5116 KB Output is correct
22 Incorrect 6 ms 5112 KB Output isn't correct
23 Halted 0 ms 0 KB -