Submission #109375

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
109375	2019-05-06 09:56:40	amiratou	Cave (IOI13_cave)	C++14	100 / 100	1238 ms	640 KiB

cave

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#include "cave.h"
#include <bits/stdc++.h>
int ans[5002];
int doors[5002];
void exploreCave(int N) {
  memset(ans,-1,sizeof ans);
  for (int i = 0; i < N; ++i){
      int l=0,r=N-1,state[N],c=0,a;
      memset(state,0,sizeof state);
      for (int i = 0; i < N; ++i)
        if(ans[i]!=-1)state[i]=ans[i];
      if(tryCombination(state)==i)c=1;
      while(l!=r){
        int med=(l+r)/2;
        for (int j = l; j <= med; ++j)
          state[j]=c;
        for (int j = med+1; j <= r; ++j)
          state[j]=(1-c);
        for (int j = 0; j < N; ++j)
          if(ans[j]!=-1)state[j]=ans[j];
        int check=tryCombination(state);
        if(check==i)l=med+1;
        else r=med;
      }
      ans[l]=c;
      doors[l]=i;
  }
  answer(ans,doors);
}
 
 
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Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:8:33: warning: unused variable 'a' [-Wunused-variable]
      int l=0,r=N-1,state[N],c=0,a;
                                 ^

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