Submission #1165786

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Source Code Expand

#include<cstdio>
#include<algorithm>
#include<cstring>
#include<iostream>
#include<vector>

#define N 100005
#define M 6000005

#define ls tree[t].l
#define rs tree[t].r
#define mid ((l+r)>>1)

#define pb push_back

using namespace std;

long long ans;

int n,F,Rank[N*2],G[N],sa[N],High[N],i,j,k,m,sum[N],trk[N],p,tot,bl[N];

char s[N*2];

void Sort()
{
	int i;
	memset(sum,0,sizeof(sum));
	for (i=1;i<=n;++i) sum[Rank[i+j]]++;
	for (i=1;i<N;++i) sum[i]+=sum[i-1];
	for (i=n;i;--i) G[sum[Rank[i+j]]--]=i;
	memset(sum,0,sizeof(sum));
	for (i=1;i<=n;++i) sum[Rank[i]]++;
	for (i=1;i<N;++i) sum[i]+=sum[i-1];
	for (i=n;i;--i) sa[sum[Rank[G[i]]]--]=G[i];
}

void get_sa()
{
	for (i=1;i<=n;++i) trk[i]=s[i];
	for (i=1;i<=n;++i) sum[trk[i]]++;
	for (i=1;i<N;++i) sum[i]+=sum[i-1];
	for (i=n;i;--i) sa[sum[trk[i]]--]=i;
	for (Rank[sa[1]]=1,p=1,i=2;i<=n;++i)
	{
		if (trk[sa[i-1]]!=trk[sa[i]]) ++p;
		Rank[sa[i]]=p;
	}
	for (j=1;j<=n;j<<=1)
	{
		Sort();
		trk[sa[1]]=1;
		for (i=2,p=1;i<=n;++i)
		{
			if (Rank[sa[i]]!=Rank[sa[i-1]]||Rank[sa[i]+j]!=Rank[sa[i-1]+j]) ++p;
			trk[sa[i]]=p; 
		}
		for (i=1;i<=n;++i) Rank[i]=trk[i];
	}
}

void get_high()
{
	int i,j;
	for (i=1,j=0;i<=n;++i)
	{
			if (Rank[i]==1) continue;
			while (s[i+j]==s[sa[Rank[i]-1]+j]) ++j;
			High[Rank[i]]=j;
			if (j) --j;
	}
}
inline int read()
{
	int x,f; char c;
	while (c=getchar(),(c<'0'||c>'9')&&c!='-');
	if (c=='-') f=1,c=getchar(); else f=0;
	x=c-'0';
	while (c=getchar(),c>='0'&&c<='9') x=(x<<1)+(x<<3)+c-'0';
	return f?-x:x;
}


int main()
{
	scanf("%s",s+1);
	n=strlen(s+1);
	get_sa(); 
	get_high();
	memset(sum,0,sizeof(sum));
	for (i=1;i<=n;++i) sum[High[i]]++;
	for (i=1;i<=n;++i) sum[i]+=sum[i-1];
		int ans=0;
	for (i=1;i<=n;++i) ans=max(ans,sum[i-1]-(i-1));
	printf("%d\n",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:85:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",s+1);
                 ^

Judge Result