Submission #946666

#	Time	Username	Problem	Language	Result	Execution time	Memory
946666		PagodePaiva	Highway Tolls (IOI18_highway)	C++17	0 / 100	10 ms	600 KiB

highway

#include "highway.h"
#include<bits/stdc++.h>
#define N 90010
#define ll long long

using namespace std;

void find_pair(int n, std::vector<int> u, std::vector<int> v, int an, int bn) {
  ll a = an;
  ll b = bn;
  int l = 0, r = n-2;
  vector <int> w(n-1);
  for(int i = 0;i < n-1;i++) w[i] = 0;
  ll custo = ask(w);
  ll d = custo/a;
  while(l < r){
    int mid = (l+r)/2;
    for(int i = l;i <= mid;i++){
      w[i] = 1;
    }
    custo = ask(w);
    if(d*a == custo){
      l = mid+1;
    }
    else{
      r = mid;
    }
  }
  answer(l, l+d);
  return;
  // int M = U.size();
  // for (int j = 0; j < 50; ++j) {
  //   std::vector<int> w(M);
  //   for (int i = 0; i < M; ++i) {
  //     w[i] = 0;
  //   }
  //   long long toll = ask(w);
  // }
  // answer(0, N - 1);
}

Compilation message (stderr)

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:10:6: warning: unused variable 'b' [-Wunused-variable]
   10 |   ll b = bn;
      |      ^

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