Submission #8534124

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;

char p1[42000010];
int n,k,bg[21][1<<20|3],cnt,p2[42000010],h1[1<<20|3],h0[1<<20|3],an,ans,f[42000010];
char s[21][1<<20|3];

int main()
{
	h1[0]=-1,h1[1]=0;
	for (int i=2; i<(1<<20); i++) h1[i]=h1[i>>1]+1;
	h0[0]=h0[1]=-1;
	for (int i=2; i<(1<<20); i++)
	{
		h0[i]=-1;
		for (int j=h1[i]; j>=0; j--)
			if (!(i>>j&1)) {h0[i]=j; break;}
	}
	scanf("%d%d",&n,&k),cnt=0;
	for (int i=0; i<=n; i++) scanf("%s",s[i]);
	for (int i=0; i<=n; i++)
		for (int j=0; j<(1<<i); j++)
		{
			bg[i][j]=(++cnt);
			for (int k=cnt; k<=cnt+i; k++) p1[k]=i,p2[k]=j;
			cnt+=i;
		}
	an=0;
	for (int i=cnt; i; i--) 
		if (i!=bg[p1[i]][p2[i]])
		{
			if (i==bg[p1[i]][p2[i]]+p1[i]&&s[p1[i]][p2[i]]=='1') f[i]++;
			int len=i-bg[p1[i]][p2[i]];
			f[bg[p1[i]-len][p2[i]>>len]]+=f[i];
			int p=h1[p2[i]&((1<<len)-1)];
			if (p!=-1) f[bg[p1[i]-(len-1-p)][((p2[i]>>len)<<p+1)|(p2[i]&((1<<p)-1))|(1<<p)]+p]+=f[i];
			if (p!=len-1) p=len-1; else p=h0[p2[i]&((1<<len)-1)];
			if (p!=-1) f[bg[p1[i]-(len-1-p)][((p2[i]>>len)<<p+1)|(p2[i]&((1<<p)-1))]+p]+=f[i];
		} else
		{
			if (f[i]<k) continue;
			if (p1[i]>an) an=p1[i],ans=p2[i]; else
			if (p1[i]==an&&ans>p2[i]) ans=p2[i]; 
		}
	for (int i=an-1; i>=0; i--) putchar((ans>>i&1)+'0');
	return puts(""),0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&k),cnt=0;
                           ^
./Main.cpp:20:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i=0; i<=n; i++) scanf("%s",s[i]);
                                           ^

Judge Result