Submission #79057

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
79057	2018-10-11 02:03:57	Sherazin	Cave (IOI13_cave)	C++14	100 / 100	357 ms	624 KiB

cave

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#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 5e3+5; 
int n;
int S[N], D[N];
bool chk[N];
void exploreCave(int N) {
  n = N;
  for(int i = 0; i < n; i++) {
    int init = tryCombination(S);
    bool t = (init == -1 || init > i);
    int l = 0, r = n-1;
    while(l < r) {
      int m = (l + r) >> 1;
      for(int j = l; j <= m; j++) if(!chk[j]) S[j] ^= 1;
      int ret = tryCombination(S);
      bool now = (ret == -1 || ret > i);
      if(t ^ now) r = m, t = now;
      else l = m+1;
    }
    if(!t) S[r] ^= 1;
    D[r] = i, chk[r] = true;
  }
  answer(S, D);
}
 
 
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• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24