Submission #1142300

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1142300	2025-01-29 15:39:33	byunjaewoo	Highway Tolls (IOI18_highway)	C++20	5 / 100	161 ms	11748 KiB

highway

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#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const int N=90010;
int n, m, p, u, v, dist, ans1, ans2, du[N], dv[N];
vector<pair<int, int>> vs, vt;
queue<int> q;
vector<pair<int, int>> adj[N];
void find_pair(int N, vector<int> U, vector<int> V, int A, int B) {
  n=N, m=U.size();
  for(int i=0; i<m; i++) adj[U[i]].push_back({V[i], i}), adj[V[i]].push_back({U[i], i});
  vector<int> tmp(m, 0);
  dist=ask(tmp)/A;
  for(int s=0, e=m-1; s<e; ) {
    int mid=(s+e)/2;
    vector<int> tmp(m, 0);
    for(int j=0; j<=mid; j++) tmp[j]=1;
    if(ask(tmp)==dist*A) p=s=mid+1;
    else e=mid;
  }
  u=U[p], v=V[p];
  fill(du, du+n, N), du[u]=0, q.push(u);
  while(!q.empty()) {
    int curr=q.front(); q.pop();
    for(auto [next, w]:adj[curr]) if(du[next]==N) du[next]=du[curr]+1, q.push(next);
  }
  fill(dv, dv+n, N), dv[v]=0, q.push(v);
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 6
• Subtask 4: 0 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31