Submission #16333

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
16333	2015-08-21 11:59:12	comet	Cave (IOI13_cave)	C++98	100 / 100	393 ms	608 KiB

cave

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#include <cstring>
#include "cave.h"
int a[5000],b[5000],p,n;
bool flip(int L,int R){
  bool ret=0;
  for(int i=L;i<=R;i++){
    if(b[i]<0)a[i]=!a[i],ret=1;
  }
  return ret;
}
void finish(){
  for(int i=0;i<n;i++){
    if(b[i]<0){
      a[i]=!a[i];
      b[i]=tryCombination(a);
      a[i]=!a[i];
    }
  }
  answer(a,b);
}
void f(int L,int R,int v){
  if(L==R){
    b[L]=v;
    if(p==v)a[L]=!a[L];
    return;
  }
  int mid=(L+R)/2;
  if(!flip(L,mid)){
    f(mid+1,R,v);
    return;
 
 
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• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24