Submission #986257

#	Time	Username	Problem	Language	Result	Execution time	Memory
986257		chautanphat	Race (IOI11_race)	C++14	Compilation error	0 ms	0 KiB

race

#include "race.h"
#include<bits/stdc++.h>

const int N = 2e5, W = 1e6;
int n, k, child[N], f[W], ans = N;
bool del[N];
vector<pair<int, int>> a[N];

void cntSize(int u, int pre = 0)
{
    child[u] = 1;
    for (int i = 0; i < (int)a[u].size(); i++)
    {
        int v = a[u][i].first;
        if (v == pre || del[v]) continue;
        cntSize(v, u);
        child[u] += child[v];
    }
}

int centroid(int u, int sz, int pre = 0)
{
    for (int i = 0; i < (int)a[u].size(); i++)
    {
        int v = a[u][i].first;
        if (v != pre && !del[v] && child[v] > sz/2) return centroid(v, sz, u);
    }
    return u;
}

void cal(int u, int dis, int mode, int pre = 0, int h = 1)
{
    if (dis > k) return;
    if (!mode)
        ans = min(ans, h+f[k-dis]);
    else f[dis] = min(f[dis], h);
    for (int i = 0; i < (int)a[u].size(); i++)
    {
        int v = a[u][i].first, w = a[u][i].second;
        if (del[v] || v == pre) continue;
        cal(v, dis+w, mode, u, h+1);
    }
}

void reset(int u, int dis, int pre = 0)
{
    if (dis > k) return;
    f[dis] = N;
    for (int i = 0; i < (int)a[u].size(); i++)
    {
        int v = a[u][i].first, w = a[u][i].second;
        if (del[v] || v == pre) continue;
        reset(v, dis+w, u);
    }
}

void decompose(int u)
{
    cntSize(u);
    int root = centroid(u, child[u]);
    del[root] = 1;

    for (int i = 0; i < (int)a[root].size(); i++)
    {
        int v = a[root][i].first, w = a[root][i].second;
        if (del[v]) continue;
        cal(v, w, 0);
        cal(v, w, 1);
    }

    for (int i = 0; i < (int)a[root].size(); i++)
    {
        int v = a[root][i].first, w = a[root][i].second;
        if (del[v]) continue;
        reset(v, w);
    }

    for (int i = 0; i < (int)a[root].size(); i++)
        if (!del[a[root][i].first]) decompose(a[root][i].first);
}

int best_path(int N1, int K, int H[][2], int L[])
{
  for (int i = 1; i <= k; i++) f[i] = N;
  for (int i = 0; i < N1; i++)
  {
    a[H[i][0]].push_back({H[i][1], L[i]});
    a[H[i][1]].push_back({H[i][0], L[i]});
  }

  n = N1, k = K;
  decompose(0);

  cout << (ans == N ? -1 : ans);
  return N;
}

Compilation message (stderr)

race.cpp:7:1: error: 'vector' does not name a type
    7 | vector<pair<int, int>> a[N];
      | ^~~~~~
race.cpp: In function 'void cntSize(int, int)':
race.cpp:12:30: error: 'a' was not declared in this scope
   12 |     for (int i = 0; i < (int)a[u].size(); i++)
      |                              ^
race.cpp: In function 'int centroid(int, int, int)':
race.cpp:23:30: error: 'a' was not declared in this scope
   23 |     for (int i = 0; i < (int)a[u].size(); i++)
      |                              ^
race.cpp: In function 'void cal(int, int, int, int, int)':
race.cpp:35:15: error: 'min' was not declared in this scope; did you mean 'std::min'?
   35 |         ans = min(ans, h+f[k-dis]);
      |               ^~~
      |               std::min
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from race.cpp:2:
/usr/include/c++/10/bits/stl_algo.h:3474:5: note: 'std::min' declared here
 3474 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
race.cpp:36:19: error: 'min' was not declared in this scope; did you mean 'std::min'?
   36 |     else f[dis] = min(f[dis], h);
      |                   ^~~
      |                   std::min
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from race.cpp:2:
/usr/include/c++/10/bits/stl_algo.h:3474:5: note: 'std::min' declared here
 3474 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
race.cpp:37:30: error: 'a' was not declared in this scope
   37 |     for (int i = 0; i < (int)a[u].size(); i++)
      |                              ^
race.cpp:41:20: error: 'w' was not declared in this scope
   41 |         cal(v, dis+w, mode, u, h+1);
      |                    ^
race.cpp: In function 'void reset(int, int, int)':
race.cpp:49:30: error: 'a' was not declared in this scope
   49 |     for (int i = 0; i < (int)a[u].size(); i++)
      |                              ^
race.cpp:53:22: error: 'w' was not declared in this scope
   53 |         reset(v, dis+w, u);
      |                      ^
race.cpp: In function 'void decompose(int)':
race.cpp:63:30: error: 'a' was not declared in this scope
   63 |     for (int i = 0; i < (int)a[root].size(); i++)
      |                              ^
race.cpp:67:16: error: 'w' was not declared in this scope
   67 |         cal(v, w, 0);
      |                ^
race.cpp:71:30: error: 'a' was not declared in this scope
   71 |     for (int i = 0; i < (int)a[root].size(); i++)
      |                              ^
race.cpp:75:18: error: 'w' was not declared in this scope
   75 |         reset(v, w);
      |                  ^
race.cpp:78:30: error: 'a' was not declared in this scope
   78 |     for (int i = 0; i < (int)a[root].size(); i++)
      |                              ^
race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:87:5: error: 'a' was not declared in this scope
   87 |     a[H[i][0]].push_back({H[i][1], L[i]});
      |     ^
race.cpp:94:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   94 |   cout << (ans == N ? -1 : ans);
      |   ^~~~
      |   std::cout
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:75,
                 from race.cpp:2:
/usr/include/c++/10/iostream:61:18: note: 'std::cout' declared here
   61 |   extern ostream cout;  /// Linked to standard output
      |                  ^~~~