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Submission #98996

# Submission time Handle Problem Language Result Execution time Memory
98996 2019-02-28T02:52:59 Z Hideo Race (IOI11_race) C++14
21 / 100
 3000 ms 12916 KB 
#include "race.h"
#include <bits/stdc++.h>
//#include "grader.cpp"

using namespace std;

#define mk make_pair
#define pb push_back
#define sc second
#define fr first
#define pii pair < int, int >
#define vii vector < pii >

const int MAXN = 2e5 + 7;
const int MAXK = 1e6 + 7;
const int INF = 1e9 + 7;

int ans = INF, k, t;
int st[MAXK], mt[MAXK], h[MAXN], del[MAXN];

vii g[MAXN];

void dfs (int v, int p = -1){
    h[v] = 1;
    for (pii to : g[v])
        if (to.fr != p && !del[to.fr])
            dfs(to.fr, v);
    if (p != -1)
        h[p] += h[v];
}

int centroid (int v){
    dfs(v);
    if (h[v] == 1)
        return -v;

    bool ok = false;
    int c = v, pr = 0;
    while (ok){
        ok = false;
        for (pii to : g[c]){
            if (to.fr != pr && !del[to.fr] && h[to.fr] * 2 >= h[v]){
                pr = c;
                c = to.fr;
                ok = true;
                break;
            }
        }
    }
    return c;
}

void findAns (int v, int p, int l, int d = 1){
    if (k > l && mt[k - l] == t)
        ans = min(ans, d + st[k - l]);
    else if (k == l)
        ans = min(ans, d);
    if (l > k)
        return;
    for (pii to : g[v])
        if (to.fr != p && !del[to.fr])
            findAns (to.fr, v, l + to.sc, d + 1);
}

void upd (int v, int p, int l, int d = 1){
    if (k > l && mt[l] != t){
        mt[l] = t;
        st[l] = d;
    }
    else if (k > l)
        st[l] = min(d, st[l]);
    if (l > k)
        return;
    for (pii to : g[v])
        if (to.fr != p && !del[to.fr])
            upd(to.fr, v, l + to.sc, d + 1);
}

void calc (int v = 0){
    v = centroid(v);
    t++;
    if (v < 0){
        del[-v] = 1;
        return;
    }
    del[v] = 1;
    for (pii to : g[v]){
        if (!del[to.fr]){
            findAns(to.fr, v, to.sc);
            upd(to.fr, v, to.sc);
        }
    }
    for (pii to : g[v])
        if (!del[to.fr])
            calc (to.fr);
}

int best_path(int N, int K, int H[][2], int L[])
{
    k = K;
    for (int i = 0; i < N - 1; i++){
        g[H[i][0]].pb(mk(H[i][1], L[i]));
        g[H[i][1]].pb(mk(H[i][0], L[i]));
    }
    calc();
    if (ans == INF)
        return -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 8 ms 4992 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 7 ms 4992 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 8 ms 4992 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 4992 KB Output is correct
13 Correct 8 ms 4992 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 4992 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 8 ms 4992 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 7 ms 4992 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 8 ms 4992 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 4992 KB Output is correct
13 Correct 8 ms 4992 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 4992 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Correct 7 ms 4992 KB Output is correct
21 Correct 9 ms 5120 KB Output is correct
22 Correct 12 ms 10368 KB Output is correct
23 Correct 12 ms 9600 KB Output is correct
24 Correct 13 ms 11008 KB Output is correct
25 Correct 13 ms 9600 KB Output is correct
26 Correct 10 ms 7680 KB Output is correct
27 Correct 8 ms 5120 KB Output is correct
28 Correct 10 ms 6656 KB Output is correct
29 Correct 12 ms 7680 KB Output is correct
30 Correct 13 ms 7936 KB Output is correct
31 Correct 13 ms 10112 KB Output is correct
32 Correct 16 ms 10112 KB Output is correct
33 Correct 18 ms 11264 KB Output is correct
34 Correct 16 ms 9728 KB Output is correct
35 Correct 20 ms 11520 KB Output is correct
36 Correct 23 ms 12416 KB Output is correct
37 Correct 27 ms 9728 KB Output is correct
38 Correct 16 ms 7808 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 8 ms 4992 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 7 ms 4992 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 8 ms 4992 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 4992 KB Output is correct
13 Correct 8 ms 4992 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 4992 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct
19 Correct 504 ms 10832 KB Output is correct
20 Correct 551 ms 10712 KB Output is correct
21 Correct 470 ms 10744 KB Output is correct
22 Correct 520 ms 10904 KB Output is correct
23 Correct 321 ms 11128 KB Output is correct
24 Correct 120 ms 11000 KB Output is correct
25 Execution timed out 3011 ms 12916 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 6 ms 4992 KB Output is correct
4 Correct 8 ms 4992 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 7 ms 4992 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 8 ms 4992 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 4992 KB Output is correct
13 Correct 8 ms 4992 KB Output is correct
14 Correct 8 ms 5120 KB Output is correct
15 Correct 8 ms 4992 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 8 ms 5120 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Correct 7 ms 4992 KB Output is correct
21 Correct 9 ms 5120 KB Output is correct
22 Correct 12 ms 10368 KB Output is correct
23 Correct 12 ms 9600 KB Output is correct
24 Correct 13 ms 11008 KB Output is correct
25 Correct 13 ms 9600 KB Output is correct
26 Correct 10 ms 7680 KB Output is correct
27 Correct 8 ms 5120 KB Output is correct
28 Correct 10 ms 6656 KB Output is correct
29 Correct 12 ms 7680 KB Output is correct
30 Correct 13 ms 7936 KB Output is correct
31 Correct 13 ms 10112 KB Output is correct
32 Correct 16 ms 10112 KB Output is correct
33 Correct 18 ms 11264 KB Output is correct
34 Correct 16 ms 9728 KB Output is correct
35 Correct 20 ms 11520 KB Output is correct
36 Correct 23 ms 12416 KB Output is correct
37 Correct 27 ms 9728 KB Output is correct
38 Correct 16 ms 7808 KB Output is correct
39 Correct 504 ms 10832 KB Output is correct
40 Correct 551 ms 10712 KB Output is correct
41 Correct 470 ms 10744 KB Output is correct
42 Correct 520 ms 10904 KB Output is correct
43 Correct 321 ms 11128 KB Output is correct
44 Correct 120 ms 11000 KB Output is correct
45 Execution timed out 3011 ms 12916 KB Time limit exceeded
46 Halted 0 ms 0 KB -