oj.uz

Submission #838914

# Submission time Handle Problem Language Result Execution time Memory
838914 2023-08-28T09:17:35 Z nnin Dreaming (IOI13_dreaming) C++14
0 / 100
 34 ms 14164 KB 
#include "dreaming.h"
#include<bits/stdc++.h>
#define pii pair<int, int>
#define f first
#define s second
using namespace std;

vector<pii> adj[100005];
vector<int> group[100005];
int maxdis[100005], n;
bool vis[100005], vis0[100005];

void dfs(int cur, int prev, int dis) {
    maxdis[cur] = max(maxdis[cur], dis);
    for(pii next:adj[cur]) {
        if(prev==next.f) continue;
        dfs(next.f, cur, dis+next.s);
    }
}

int mnGroup(int i) {
    int last = n;
    for(int j=1;j<group[i].size();j++) {
        int st = n;
        for(int node:group[i]) {
            if(!vis[node] && maxdis[node]>=maxdis[st] && maxdis[node]>=maxdis[last]) st = node;
        }
        if(st==n) break;
        dfs(st, -1, 0);
        vis[st] = 1;
        last = st;
    }
    int ret = INT_MAX;
    for(int mxdis:group[i]) {
        ret = min(ret, maxdis[mxdis]);
    }
    return ret;
}

void inGroup(int root, int cur, int prev) {
    group[root].push_back(cur);
    vis0[cur] = 1;
    for(pii next:adj[cur]) {
        if(next.f==prev) continue;
        inGroup(root, next.f, cur);
    }
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    n = N;
    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]});
    }
    for(int i=0;i<N;i++) {
        if(vis0[i]) continue;
        inGroup(i, i, -1);
    }
    int mx = -1, mx2 = -1, mx3 = -1;
    for(int i=0;i<N;i++) {
        if(group[i].empty()) continue;
        int mn = mnGroup(i);
        if(mn >= mx) {
            mx3 = mx2;
            mx2 = mx;
            mx = mn;
        } else if(mn >= mx2) {
            mx3 = mx2;
            mx2 = mn;
        } else if(mn > mx3) {
            mx3 = mn;
        }
    }
    int ans = mx;
    if(mx3!=-1) {
        ans = max(ans, mx3+mx2+L+L);
    }
    if(mx2!=-1) {
        ans = max(ans, mx+mx2+L);
    }
    return ans;
}

Compilation message

dreaming.cpp: In function 'int mnGroup(int)':
dreaming.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int j=1;j<group[i].size();j++) {
      |                 ~^~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 14164 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 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 14164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 9812 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 14164 KB Output isn't correct
2 Halted 0 ms 0 KB -