Submission #354321

#	Time	Username	Problem	Language	Result	Execution time	Memory
354321		David_M	Cave (IOI13_cave)	C++14	100 / 100	399 ms	620 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
int c[5003],f[5003],a[5003],i,j,x,l,r,m,e,ans;
void A(int R){for(;R>=l;R--)c[R]^=!f[R];}
int T(){return (tryCombination(c)+10000)%10000<=i;}
void exploreCave(int N){
	for(i=0;i<N;i++){
		l=0;r=N-1;
		if(T())A(r);
		while(l<=r){
			m=(l+r)/2;
			for(int o=l;o<=m;o++)
				if(f[o]==0)
					c[o]^=1;
			e=tryCombination(c);
			if(e!=-1&&e<=i)e=1;
			else e=0;
			for(int o=l;o<=m;o++)
				if(f[o]==0)
					c[o]^=1;
			if(e) ans=m,r=m-1;
			else l=m+1;
		}
		a[ans]=i;
		f[ans]=1;
	}answer(c,a);
}

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