Submission #898305

#	Time	Username	Problem	Language	Result	Execution time	Memory
898305		8pete8	Meetings (JOI19_meetings)	C++17	0 / 100	353 ms	1280 KiB

meetings

#include "meetings.h"
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <set>
#include <utility>
#include <vector>
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<float.h>
#include<limits.h>
#include <cassert>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric> //gcd(a,b)
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
const int mxn=2e3;
using namespace std;/*
namespace {

const int MAX_N = 2000;
const int MAX_CALLS = 100000;

void WrongAnswer(int code) {
  printf("Wrong Answer [%d]\n", code);
  exit(0);
}

int N, num_calls;
std::vector<int> graph[MAX_N];
std::set<std::pair<int, int>> edges, edges_reported;

int weight[MAX_N];

bool Visit(int p, int e, int rt = -1) {
  if (p == e) {
    ++weight[p];
    return true;
  }
  for (int q : graph[p]) {
    if (q != rt) {
      if (Visit(q, e, p)) {
        ++weight[p];
        return true;
      }
    }
  }
  return false;
}

}  // namespace

int Query(int u, int v, int w) {
  if (!(0 <= u && u <= N - 1 && 0 <= v && v <= N - 1 && 0 <= w && w <= N - 1 &&
        u != v && u != w && v != w)) {
    WrongAnswer(1);
  }
  if (++num_calls > MAX_CALLS) {
    WrongAnswer(2);
  }
  std::fill(weight, weight + N, 0);
  Visit(u, v);
  Visit(u, w);
  Visit(v, w);
  for (int x = 0; x < N; ++x) {
    if (weight[x] == 3) {
      return x;
    }
  }
  printf("Error: the input may be invalid\n");
  exit(0);
}

void Bridge(int u, int v) {
  if (!(0 <= u && u < v && v <= N - 1)) {
    WrongAnswer(3);
  }
  if (!(edges.count(std::make_pair(u, v)) >= 1)) {
    cout<<u<<" "<<v<<'\n';
    WrongAnswer(4);
  }
  if (!(edges_reported.count(std::make_pair(u, v)) == 0)) {
    WrongAnswer(5);
  }
  edges_reported.insert(std::make_pair(u, v));
}*/
set<int>adj[mxn+10];
bool vis[mxn+10];
void dfs(int root,int cur,int node,int parent){
  int k=(root==cur?cur:Query(root,node,cur));
  if(k==node){
    adj[parent].erase(adj[parent].find(cur));
    adj[parent].insert(node);
    adj[node].insert(cur);
    vis[node]=true;
    return;
  }
  if(k==cur){
    for(auto i:adj[cur]){
      if(Query(i,cur,node)!=cur){
        dfs(root,i,node,cur);
        return;
      }
    }
    adj[cur].insert(node);
    vis[node]=true;
    return;
  }
  dfs(root,root,k,-1);
  dfs(root,k,node,-1);
  vis[node]=true;
}
void Solve(int a){
  int root=Query(0,1,2);
  vis[0]=vis[1]=vis[2]=true;
  for(int i=0;i<3;i++)if(i!=root)adj[root].insert(i);
  for(int i=3;i<a;i++){
    if(!vis[i])dfs(root,root,i,-1);
  }
  for(int i=0;i<a;i++){
    for(auto j:adj[i]){
      Bridge(min(i,j),max(i,j));
    }
  }
}/*
int main() {
  if (scanf("%d", &N) != 1) {
    fprintf(stderr, "Error while reading input\n");
    exit(1);
  }
  for (int i = 0; i < N - 1; ++i) {
    int u, v;
    if (scanf("%d%d", &u, &v) != 2) {
      fprintf(stderr, "Error while reading input\n");
      exit(1);
    }
    graph[u].push_back(v);
    graph[v].push_back(u);
    edges.insert(std::make_pair(min(u,v), max(u,v)));
  }

  num_calls = 0;
  Solve(N);
  if (edges_reported.size() != static_cast<size_t>(N - 1)) {
    WrongAnswer(6);
  }
  printf("Accepted: %d\n", num_calls);
  return 0;
}*/

• Subtask 1: 0 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 71