oj.uz

Submission #838920

# Submission time Handle Problem Language Result Execution time Memory
838920 2023-08-28T09:27:07 Z nnin Dreaming (IOI13_dreaming) C++14
0 / 100
 36 ms 15304 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];
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);
    }
}

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[]) {
    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, mxx = -1;
    for(int i=0;i<N;i++) {
        if(group[i].empty()) continue;
        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 mn = INT_MAX;
        for(int mxdis:group[i]) {
            mn = min(mn, maxdis[mxdis]);
            mxx = max(mxx, maxdis[mxdis]);
        }
        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 = mxx;
    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 travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:43:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         for(int j=1;j<group[i].size();j++) {
      |                     ~^~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 14156 KB Output is correct
2 Correct 36 ms 15304 KB Output is correct
3 Correct 24 ms 12396 KB Output is correct
4 Correct 7 ms 6612 KB Output is correct
5 Correct 6 ms 5844 KB Output is correct
6 Correct 11 ms 7408 KB Output is correct
7 Incorrect 3 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Incorrect 2 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 14156 KB Output is correct
2 Correct 36 ms 15304 KB Output is correct
3 Correct 24 ms 12396 KB Output is correct
4 Correct 7 ms 6612 KB Output is correct
5 Correct 6 ms 5844 KB Output is correct
6 Correct 11 ms 7408 KB Output is correct
7 Incorrect 3 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 19 ms 9832 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Incorrect 2 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 14156 KB Output is correct
2 Correct 36 ms 15304 KB Output is correct
3 Correct 24 ms 12396 KB Output is correct
4 Correct 7 ms 6612 KB Output is correct
5 Correct 6 ms 5844 KB Output is correct
6 Correct 11 ms 7408 KB Output is correct
7 Incorrect 3 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -