Submission #713825

#	Time	Username	Problem	Language	Result	Execution time	Memory
713825		LittleOrange	Highway Tolls (IOI18_highway)	C++17	0 / 100	13 ms	1232 KiB

highway

#include "highway.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
struct line{
    ll to,i;
};

void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
  int M = U.size();
  vector<vector<line>> con(N);
  for(ll i = 0;i<M;i++){
    con[U[i]].push_back({V[i],i});
    con[V[i]].push_back({U[i],i});
  }
  if (M == N-1){
    vector<int> w(M,0);
    ll total_dis = ask(w)/A;
    auto doask = [&](){
        return (ask(w)-total_dis*A)/(B-A);
    };
    if (N<=100){
        vector<int> ans;
        for(int i = 0;i<N;i++){
            for(line l : con[i]){
                w[l.i] = 1;
            }
            if (doask()==1) ans.push_back(i+1);
            for(line l : con[i]){
                w[l.i] = 0;
            }
        }
        answer(ans[0],ans[1]);
    }
  }
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 6
• Subtask 4: 0 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31