oj.uz

Submission #482435

# Submission time Handle Problem Language Result Execution time Memory
482435 2021-10-24T14:44:32 Z Spade1 Dreaming (IOI13_dreaming) C++14
18 / 100
 54 ms 12308 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
#define ll long long
#define pii pair<int, int>
#define st first
#define nd second
using namespace std;

vector<pii> adj[100010];
vector<pii> connect;
bool visited[100010];

int max_dis, min_dis;
int u, v;

void dfs(int i, int prt, int dis) {
    visited[i] = 1;
    if (dis > max_dis) {
        u = i;
        max_dis = dis;
    }
    for (auto j : adj[i]) {
        if (j.st == prt) continue;
        dfs(j.st, i, dis + j.nd);
    }
}

int dfs2(int i, int prt, int dis) {
    if (i == v) {
        min_dis = dis;
        return 0;
    }
    for (auto j : adj[i]) {
        if (j.st == prt) continue;
        int k = dfs2(j.st, i, dis + j.nd);
        if (k == -1) continue;
        k += j.nd;
        min_dis = min(max(dis, k), min_dis);
        return k;
    }

    return -1;
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    for (int i = 0; i < M; ++i) {
        adj[A[i]].push_back({B[i], T[i]});
        adj[B[i]].push_back({A[i], T[i]});
    }

    int mx1 = INT_MIN, mx2 = INT_MIN, mx3 = INT_MIN;

    for (int i = 0; i < N; ++i) {
        if (visited[i]) continue;
        max_dis = 0, u = i;
        dfs(i, -1, 0);
        max_dis = 0, v = u;
        dfs(v, -1, 0);
        min_dis = INT_MAX;
        dfs2(u, -1, 0);
        if (min_dis > mx1) {
            mx3 = mx2;
            mx2 = mx1;
            mx1 = min_dis;
        }
        else if (min_dis > mx2) {
            mx3 = mx2;
            mx2 = min_dis;
        }
        else if (min_dis > mx3) {
            mx3 = min_dis;
        }
    }

    if (N - M == 1) return mx1;
    if (N - M == 2) return mx1 + mx2 + L;
    else return max(mx1 + mx2 + L, mx2 + mx3 + 2*L);
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 54 ms 12308 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2636 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 54 ms 12308 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 5000 KB Output is correct
2 Correct 14 ms 4992 KB Output is correct
3 Correct 16 ms 5048 KB Output is correct
4 Correct 15 ms 5068 KB Output is correct
5 Correct 15 ms 5068 KB Output is correct
6 Correct 19 ms 5212 KB Output is correct
7 Correct 16 ms 5152 KB Output is correct
8 Correct 15 ms 4940 KB Output is correct
9 Correct 15 ms 5008 KB Output is correct
10 Correct 16 ms 5044 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 3 ms 2764 KB Output is correct
13 Correct 3 ms 2764 KB Output is correct
14 Correct 3 ms 2764 KB Output is correct
15 Correct 3 ms 2764 KB Output is correct
16 Correct 3 ms 2764 KB Output is correct
17 Correct 3 ms 2636 KB Output is correct
18 Correct 4 ms 2764 KB Output is correct
19 Correct 2 ms 2764 KB Output is correct
20 Correct 1 ms 2636 KB Output is correct
21 Correct 2 ms 2636 KB Output is correct
22 Correct 1 ms 2636 KB Output is correct
23 Correct 3 ms 2764 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2636 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 54 ms 12308 KB Output isn't correct
2 Halted 0 ms 0 KB -