Submission #3008

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
3008	2013-08-22 12:29:26	cki86201	Cave (IOI13_cave)	C++98	100 / 100	348 ms	544 KiB

cave

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#include "cave.h"
int D[5050],S[8200];
int u;
bool check[5050];
int solve(int s,int d,int h,bool now)
{
  if(h==-1){
    now?0:S[s]^=1;
    return s;
  }
  int i;
  for(i=(s+d)>>1;i<d;i++){
    if(!check[i])S[i]^=1;
  }
  bool p=(tryCombination(S)!=u);
  if(now^p)return solve((s+d)>>1,d,h-1,p);
  else return solve(s,(s+d)>>1,h-1,p);
}
void exploreCave(int N) {
    int i,j,k;
    for(i=0;i<N;i++){
    u=i;
    int t=solve(0,(1<<13),12,tryCombination(S)!=i);
    D[t]=i;
    check[t]=1;
    }
    answer(S,D);
 
 
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Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:23:11: warning: unused variable 'j' [-Wunused-variable]
     int i,j,k;
           ^
cave.cpp:23:13: warning: unused variable 'k' [-Wunused-variable]
     int i,j,k;
             ^

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