Online Judge | Problem Set | Authors | Online Contests | User | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest |
为什么会RE?cnt数组开成35和50都是re,开成N(=200010)就a了。。。求解。。。 帖代码(基本参照罗穗骞前辈的后缀树组模板): #include<cstdio> #include<cstring> #include<algorithm> using namespace std; const int N=200010; int n,m,l; int r[N],sa[N],h[N]; int cnt[N],rank[N],x[N],y[N]; char s[N]; int cmp(int a,int b,int j) {return y[a]==y[b]&&y[a+j]==y[b+j];} void da(int n,int m) { int i,j,p=1; memset(cnt,0,sizeof cnt); for (i=0;i<n;i++) cnt[x[i]=r[i]]++; for (i=1;i<m;i++) cnt[i]+=cnt[i-1]; for (i=n-1;i>=0;i--) sa[--cnt[x[i]]]=i; for (j=1;p<n;j<<=1,m=p) { for (p=0,i=n-j;i<n;i++) y[p++]=i; for (i=0;i<n;i++) if (sa[i]>=j) y[p++]=sa[i]-j; #define xi x[y[i]] memset(cnt,0,sizeof cnt); for (i=0;i<n;i++) cnt[xi]++; for (i=1;i<m;i++) cnt[i]+=cnt[i-1]; for (i=n-1;i>=0;i--) sa[--cnt[xi]]=y[i]; for (swap(x,y),x[sa[0]]=0,p=i=1;i<n;i++) x[sa[i]]= cmp(sa[i-1],sa[i],j)? p-1:p++; } } void calh(int n) { int i,j,k=0; for (i=1;i<=n;i++) rank[sa[i]]=i; for (i=0;i<n;h[rank[i++]]=k) for (k?k--:0,j=sa[rank[i]-1];r[i+k]==r[j+k];k++); } int solve() { int ans=0; for (int i=1;i<=n+m+1;i++) if (h[i]>ans) { if (sa[i-1]<n&&sa[i]>n) ans=h[i]; if (sa[i]<n&&sa[i-1]>n) ans=h[i]; } return ans; } int main() { // freopen("test.in","r",stdin); scanf("%s",s),n=strlen(s); for (int i=0;i<n;i++) r[i]=s[i]-'a'+1;r[n]=28; scanf("%s",s),m=strlen(s); for (int i=0;i<m;i++) r[i+n+1]=s[i]-'a'+1;r[n+m+1]=0; da(n+m+2,30); calh(n+m+1); printf("%d\n",solve()); return 0; } Followed by:
Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator