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Submission #432661

# Submission time Handle Problem Language Result Execution time Memory
432661 2021-06-18T12:12:48 Z TryMax Stations (IOI20_stations) C++17
0 / 100
 3000 ms 2097156 KB 
#include "stations.h"
#include <bits/stdc++.h>
#ifdef LOCAL
    #include "stub.cpp"
#endif // LOCAL

#define f first
#define s second
#define pb push_back

using namespace std;

const int N = 2e5 + 10;

int sz[N], p[N], timer;
vector<int> a[N], lb;

int cypher(int a, int b){
    return a * 1000 + (b - 1);
}

pair<int, int> decyper(int num){
    return {num / 1000, num % 1000 + 1};
}

void dfs(int u, int pr){
    sz[u] = 1;
    p[u] = timer++;
    for(auto v : a[u])
        if(pr != v){
            dfs(v, u);
            sz[v] += sz[u];
        }
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    lb.resize(n);
    for(int i = 0; i < n - 1; ++i){
        a[u[i]].pb(v[i]);
        a[v[i]].pb(u[i]);
    }
    dfs(0, -1);
    for(int i = 0; i < n; ++i)
        lb[i] = cypher(p[i], sz[i]);
    return lb;
}

int find_next_station(int s, int t, vector<int> c) {
    pair<int, int> s1 = decyper(s);
    pair<int, int> t1 = decyper(t);
    int pr = 0;
    vector<pair<int, int>> p;
    for(auto v : c){
        pair<int, int> c1 = decyper(v);
        if(c1.f == s1.f - 1)
            pr = v;
        p.pb(c1);
    }
    sort(p.begin(), p.end());
    if(t1.f < s1.f || t1.f >= p.back().f + p.back().s)
        return pr;
    for(int i = p.size() - 1; i >= 0; --i)
        if(t1.f >= p[i].f)
            return cypher(p[i].f, p[i].s);
}
/*
1
5 1000000
0 1
1 2
1 3
2 4
2
2 0 1
1 3 3

9
1
3

*/

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:52:28: warning: control reaches end of non-void function [-Wreturn-type]
   52 |     vector<pair<int, int>> p;
      |                            ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 1794 ms 2097156 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3039 ms 5104 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 1316 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 Incorrect 955 ms 9992 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Runtime error 2125 ms 2097156 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -