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Submission #167991

# Submission time Handle Problem Language Result Execution time Memory
167991 2019-12-11T06:30:20 Z davitmarg Dreaming (IOI13_dreaming) C++17
32 / 100
 162 ms 26360 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] = mod * mod;
    ans[v] = min(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:68:23: 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

# Verdict Execution time Memory Grader output
1 Correct 153 ms 26360 KB Output is correct
2 Correct 157 ms 25576 KB Output is correct
3 Correct 97 ms 22304 KB Output is correct
4 Correct 21 ms 8184 KB Output is correct
5 Correct 18 ms 6904 KB Output is correct
6 Correct 33 ms 9848 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 70 ms 14072 KB Output is correct
9 Correct 98 ms 18556 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 134 ms 20216 KB Output is correct
12 Correct 162 ms 23252 KB Output is correct
13 Correct 7 ms 5240 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 153 ms 26360 KB Output is correct
2 Correct 157 ms 25576 KB Output is correct
3 Correct 97 ms 22304 KB Output is correct
4 Correct 21 ms 8184 KB Output is correct
5 Correct 18 ms 6904 KB Output is correct
6 Correct 33 ms 9848 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 70 ms 14072 KB Output is correct
9 Correct 98 ms 18556 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 134 ms 20216 KB Output is correct
12 Correct 162 ms 23252 KB Output is correct
13 Correct 7 ms 5240 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 6 ms 5112 KB Output is correct
16 Correct 7 ms 5116 KB Output is correct
17 Correct 6 ms 4984 KB Output is correct
18 Correct 7 ms 5112 KB Output is correct
19 Correct 6 ms 4984 KB Output is correct
20 Correct 6 ms 5004 KB Output is correct
21 Correct 6 ms 5112 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

# Verdict Execution time Memory Grader output
1 Correct 153 ms 26360 KB Output is correct
2 Correct 157 ms 25576 KB Output is correct
3 Correct 97 ms 22304 KB Output is correct
4 Correct 21 ms 8184 KB Output is correct
5 Correct 18 ms 6904 KB Output is correct
6 Correct 33 ms 9848 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 70 ms 14072 KB Output is correct
9 Correct 98 ms 18556 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 134 ms 20216 KB Output is correct
12 Correct 162 ms 23252 KB Output is correct
13 Correct 7 ms 5240 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 6 ms 5112 KB Output is correct
16 Correct 7 ms 5116 KB Output is correct
17 Correct 6 ms 4984 KB Output is correct
18 Correct 7 ms 5112 KB Output is correct
19 Correct 6 ms 4984 KB Output is correct
20 Correct 6 ms 5004 KB Output is correct
21 Correct 6 ms 5112 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

# Verdict Execution time Memory Grader output
1 Correct 77 ms 13464 KB Output is correct
2 Correct 76 ms 13536 KB Output is correct
3 Correct 75 ms 13616 KB Output is correct
4 Correct 90 ms 13600 KB Output is correct
5 Correct 80 ms 13444 KB Output is correct
6 Correct 89 ms 14552 KB Output is correct
7 Correct 95 ms 13908 KB Output is correct
8 Correct 84 ms 13424 KB Output is correct
9 Correct 74 ms 13296 KB Output is correct
10 Correct 78 ms 13808 KB Output is correct
11 Correct 6 ms 4984 KB Output is correct
12 Correct 40 ms 10860 KB Output is correct
13 Correct 40 ms 10984 KB Output is correct
14 Correct 40 ms 10988 KB Output is correct
15 Correct 40 ms 10984 KB Output is correct
16 Correct 43 ms 10956 KB Output is correct
17 Correct 40 ms 10988 KB Output is correct
18 Correct 41 ms 10964 KB Output is correct
19 Correct 40 ms 10860 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 10856 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 153 ms 26360 KB Output is correct
2 Correct 157 ms 25576 KB Output is correct
3 Correct 97 ms 22304 KB Output is correct
4 Correct 21 ms 8184 KB Output is correct
5 Correct 18 ms 6904 KB Output is correct
6 Correct 33 ms 9848 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 70 ms 14072 KB Output is correct
9 Correct 98 ms 18556 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 134 ms 20216 KB Output is correct
12 Correct 162 ms 23252 KB Output is correct
13 Correct 7 ms 5240 KB Output is correct
14 Incorrect 7 ms 5112 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 153 ms 26360 KB Output is correct
2 Correct 157 ms 25576 KB Output is correct
3 Correct 97 ms 22304 KB Output is correct
4 Correct 21 ms 8184 KB Output is correct
5 Correct 18 ms 6904 KB Output is correct
6 Correct 33 ms 9848 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 70 ms 14072 KB Output is correct
9 Correct 98 ms 18556 KB Output is correct
10 Correct 7 ms 5240 KB Output is correct
11 Correct 134 ms 20216 KB Output is correct
12 Correct 162 ms 23252 KB Output is correct
13 Correct 7 ms 5240 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 6 ms 5112 KB Output is correct
16 Correct 7 ms 5116 KB Output is correct
17 Correct 6 ms 4984 KB Output is correct
18 Correct 7 ms 5112 KB Output is correct
19 Correct 6 ms 4984 KB Output is correct
20 Correct 6 ms 5004 KB Output is correct
21 Correct 6 ms 5112 KB Output is correct
22 Incorrect 6 ms 5112 KB Output isn't correct
23 Halted 0 ms 0 KB -