#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char*mmap();
#define RD(v) int v=0;{int c;while(c=*rp++-48,c>=0)v=v*10+c;}

char wbuf[32];
#define WT(v) *--wp=32;while(*--wp=v%10+48,v/=10);

#define N 100000

int abuf[N*2+1];
#define a (abuf+N)

main(){
	char*rp=mmap(0l,1600l<<10,1,2,0,0ll);
	while(*rp++!=10);
	do{
		int neg=0;
		if(*rp=='-'){
			++rp;
			neg=1;
		}
		RD(x);
		if(neg) x=-x;
		++a[x];
	}while(*rp);

	char*wp=wbuf+sizeof wbuf;

	// moist
	{
		int z=a[0]>>1;
		for(int i=N+1;--i;){
			z+=a[-i]<a[i]?a[-i]:a[i];
		}
		WT(z);
	}

	// wet
	{
		int z=0,y=0;
		for(int i=N+1;--i;){
			y+=a[i];
			int t=a[1-i];
			if(t>y) t=y;
			z+=t;
			y-=t;
		}
		z+=y>>1;
		WT(z);
	}

	// dry
	{
		int z=0,y=0;
		for(int i=N+1;--i;){
			y+=a[-i];
			int t=a[i-1];
			if(t>y) t=y;
			z+=t;
			y-=t;
		}
		z+=y>>1;
		WT(z);
	}

	write(1,wp,wbuf+(sizeof wbuf)-wp);
	_exit(0);
}