Submission #987751

#	Time	Username	Problem	Language	Result	Execution time	Memory
987751		AdamGS	Counting Mushrooms (IOI20_mushrooms)	C++17	80.71 / 100	10 ms	984 KiB

mushrooms

#include "mushrooms.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
int count_mushrooms(int n) {
  vector<int>A, B;
  A.pb(0);
  int l=1, ans=0;
  while(l<n) {
    if(A.size()>=B.size()) {
      int p=min(n-l, (int)A.size());
      vector<int>T;
      rep(i, p) {
        T.pb(A[i]);
        T.pb(l);
        ++l;
      }
      int x=use_machine(T);
      if(x%2==0) A.pb(l-1); else B.pb(l-1);
      ans+=p-1-x/2;
    } else {
      int p=min(n-l, (int)B.size());
      vector<int>T;
      rep(i, p) {
        T.pb(B[i]);
        T.pb(l);
        ++l;
      }
      int x=use_machine(T);
      if(x%2==0) B.pb(l-1); else A.pb(l-1);
      ans+=x/2;
    }
  }
  ans+=A.size();
  return ans;
}

• Subtask 1: 80.7143 / 100