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Submission #517189

# Submission time Handle Problem Language Result Execution time Memory
517189 2022-01-22T16:57:10 Z Ai7081 Stations (IOI20_stations) C++17
0 / 100
 962 ms 656 KB 
#include <bits/stdc++.h>
using namespace std;

int cnt;
vector<int> ret, sub;
vector<vector<int>> adj;

void dfs(int v, int p, bool ismax) {
    ret[v] = cnt;
    cnt += (!ismax);
    sub[v] = 1;
    for (auto to : adj[v]) {
        if (to == p) continue;
        dfs(to, v, !ismax);
        if (ismax) ret[v] += sub[to];
        sub[v] += sub[to];
    }
    cnt += ismax;
    return;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    adj.assign(n, vector<int>());
    for (int i=0; i<n-1; i++) {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
    }
    sub.assign(n, 0);
    ret.assign(n, 0);
    dfs(0, 0, 0);
    return ret;
}

int find_next_station(int s, int t, vector<int> c) {
    bool ismax = (s > c[0]);
    if (ismax) {
        if (t > s) return c[0];
        for (int i=1; i<(int)c.size(); i++) {
            if (t < c[i]) return c[i-1];
        }
        return c[c.size()-1];
    }
    else {
        if (t < s) return c[c.size()-1];
        for (int i=c.size()-2; i>=0; i++) {
            if (t > c[i]) return c[i+1];
        }
        return c[0];
    }
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 416 KB Invalid labels (values out of range). scenario=2, k=1000, vertex=1, label=1008
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 408 KB Invalid labels (values out of range). scenario=1, k=1000, vertex=1, label=1507
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 459 ms 612 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 962 ms 400 KB Output is correct
2 Incorrect 719 ms 488 KB Wrong query response.
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 656 ms 656 KB Wrong query response.
2 Halted 0 ms 0 KB -