Submission #299103

#	Time	Username	Problem	Language	Result	Execution time	Memory
299103		erd1	Cave (IOI13_cave)	C++14	100 / 100	1477 ms	764 KiB

cave

#include "cave.h"

#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
#define pb push_back
typedef int64_t lld;
typedef pair<int, int> pii;

vector<int> v;
int query[5000] = {}, ans[5000] = {}, pos[5000] = {};
void exploreCave(int N){
  v.resize(N);
  fill(all(v), 1);
  for(int i = 0; i < N; i++){
    for(int j = 0; j < N; j++)
      query[j] = ans[j] || v[j];
    bool correct = (tryCombination(query) != i);
    int l = 0, r = N+1;
    while(r-l > 1){
      for(int j = 0; j < N; j++)
        query[j] = ans[j] || (v[j] && (j < (l+r)/2?correct:!correct));
      if(tryCombination(query) == i)l = (l+r)/2;
      else r = (l+r)/2;
    }
    v[l] = 0;
    ans[l] = correct;
    pos[l] = i;
  }
  answer(ans, pos);
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24