Submission #551217

#	Time	Username	Problem	Language	Result	Execution time	Memory
551217		AriaH	Race (IOI11_race)	C++17	Compilation error	0 ms	0 KiB

race

#include "grader.h"
/* Im the best and i work like that */

#pragma GCC optimize("Ofast")

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair < int, int > pii;
typedef pair < ll, ll > pll;

#define F first
#define S second
#define all(x) x.begin(),x.end()
#define Mp make_pair
#define point complex
#define endl '\n'
#define SZ(x) (int)x.size()
#define fast_io ios::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define file_io freopen("input.txt", "r+", stdin); freopen("output.txt", "w+", stdout);
#define mashtali return cout << "Hello, World!", 0;

const int N = 1e6 + 10;
const int LOG = 20;
const ll mod = 1e9 + 7;
const ll inf = 8e18;
const double pi = acos(-1);
const ld eps = 1e-18;
const ld one = 1.;

ll pw(ll a, ll b, ll M, ll ret = 1) { if(a == 0) return 0; a %= M; while(b) { ret = (b & 1? ret * a % M : ret), a = a * a % M, b >>= 1; } return ret % M; }

mt19937 rng(time(nullptr));

vector < pii > G[N];

vector < int > S[N];

multiset < int > st[N];

int n, k, tot, sub[N], hide[N];

ll dis[N], H[N];

void pre(int v, int P = -1)
{
  sub[v] = 1;
  for(auto [u, c] : G[v])
  {
    if(hide[u] || u == P) continue;
    pre(u, v);
    sub[v] += sub[u];
  }
}

int find(int v, int P, int _n)
{
  for(auto [u, c] : G[v])
  {
    if(hide[u] || u == P) continue;
    if(sub[u] * 2 > _n) return find(u, v, _n);
  }
  return v;
}

void calc(int v, int P, int jad)
{
  S[jad].push_back(v);
  if(dis[v] < N)
  {
    st[dis[v]].insert(H[v]);
  }
  for(auto [u, c] : G[v])
  {
    if(hide[u] || u == P) continue;
    H[u] = H[v] + 1;
    dis[u] = dis[v] + c;
    calc(u, v, jad);
  }
}

void dec(int v)
{
  pre(v);
  int _n = sub[v];
  int cen = find(v, -1, _n);
  for(auto [u, c] : G[cen])
  {
    if(hide[u]) continue;
    dis[u] = c;
    H[u] = 1;
    calc(u, cen, u);
  }
  if(SZ(st[k]))
  {
    tot = min(tot, *st[k].begin());
  }
  for(auto [u, c] : G[cen])
  {
    if(hide[u]) continue;
    for(auto node : S[u])
    {
      if(dis[node] >= N) continue;
      st[dis[node]].erase(st[dis[node]].find(H[node]));
    }
    for(auto node : S[u])
    {
      if(dis[node] >= k) continue;
      if(SZ(st[k - dis[node]]))
      {
        tot = min((ll)tot, H[node] + *st[k - dis[node]].begin());
      }
    }
    S[u].clear();
  }
  hide[cen] = 1;
  for(auto [u, c] : G[cen])
  {
    if(hide[u]) continue;
    dec(u);
  }
}

int best_path(int _n, int K, int H[][2], int L[])
{
  tot = 1e9;
  n = _n;
  k = K;
  for(int i = 0; i < n - 1; i ++)
  {
    int a = H[i][0], b = H[i][1];
    G[a].push_back(Mp(b, L[i]));
    G[b].push_back(Mp(a, L[i]));
  }
  dec(1);
  if(tot == 1e9)
  {
    return -1;
  }
  return tot;
}

Compilation message (stderr)

race.cpp:1:10: fatal error: grader.h: No such file or directory
    1 | #include "grader.h"
      |          ^~~~~~~~~~
compilation terminated.