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Submission #367254

# Submission time Handle Problem Language Result Execution time Memory
367254 2021-02-16T17:01:39 Z PurpleCrayon Stations (IOI20_stations) C++17
0 / 100
 3000 ms 2097156 KB 
#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

#define sz(v) int(v.size())

int tt=0;
vector<int> ans;
vector<vector<int>> adj;

void dfs(int c=0, int p=-1, bool b=0){
    if (!b) ans[c] = tt++;
    for (auto nxt : adj[c]) if (nxt != p) dfs(nxt, c, b^1);
    if (b) ans[c] = tt++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    ans.assign(n, -1), adj.resize(n);
    for (int i = 0; i < n-1; i++) 
        adj[u[i]].push_back(v[i]), adj[v[i]].push_back(u[i]);
    dfs();
    return ans;
}

int find_next_station(int s, int t, vector<int> c) {
    bool b=s>c[0];

    if (b){ //i'm postorder
        int p = c[0];
        if (sz(c) == 1 || t < c[1] || t > s) //either going out of my subtree, there is no subtree
            return p; 
        
        int ans=-1;
        for (auto nxt : c) if (nxt != p) {
            if (nxt <= t) ans = nxt;
        }
        return ans;

    } else { //i'm preorder
        int p = c[sz(c)-1];
        if (sz(c) == 1 || t < s || t > c[sz(c)-1]) //either going out of my subtree, there is no subtree
            return p;

        int ans=-1;
        for (auto nxt : c) if (nxt != p) {
            if (nxt >= t){
                ans = nxt;
                break;
            }
        }
        return ans;
    }
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 492 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3033 ms 2760 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 1531 ms 2097156 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1132 ms 940 KB Output is correct
2 Runtime error 1243 ms 2097156 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Runtime error 2343 ms 2097152 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -