• zoj 3228:Searching the String


    Description

    Little jay really hates to deal with string. But moondy likes it very much, and she's so mischievous that she often gives jay some dull problems related to string. And one day, moondy gave jay another problem, poor jay finally broke out and cried, " Who can help me? I'll bg him! "

    So what is the problem this time?

    First, moondy gave jay a very long string A. Then she gave him a sequence of very short substrings, and asked him to find how many times each substring appeared in string A. What's more, she would denote whether or not founded appearances of this substring are allowed to overlap.

    At first, jay just read string A from begin to end to search all appearances of each given substring. But he soon felt exhausted and couldn't go on any more, so he gave up and broke out this time.

    I know you're a good guy and will help with jay even without bg, won't you?

    Input

    Input consists of multiple cases( <= 20 ) and terminates with end of file.

    For each case, the first line contains string A ( length <= 10^5 ). The second line contains an integer N ( N <= 10^5 ), which denotes the number of queries. The next N lines, each with an integer type and a string a ( length <= 6 ), type = 0 denotes substring a is allowed to overlap and type = 1 denotes not. Note that all input characters are lowercase.

    There is a blank line between two consecutive cases.

    Output

    For each case, output the case number first ( based on 1 , see Samples ).

    Then for each query, output an integer in a single line denoting the maximum times you can find the substring under certain rules.

    Output an empty line after each case.

    Sample Input

    ab
    2
    0 ab
    1 ab
    
    abababac
    2
    0 aba
    1 aba
    
    abcdefghijklmnopqrstuvwxyz
    3
    0 abc
    1 def
    1 jmn
    

    Sample Output

    Case 1
    1
    1
    
    Case 2
    3
    2
    
    Case 3
    1
    1
    0
    

    0的话就正常累计,1的话累计的时候加个判断:上次累计的位置与这次的距离是否达到该串长度。

    #include<queue>
    #include<cstdio>
    #include<cstring>
    #include<algorithm>
    using namespace std;
    
    const int MAX=26,Tr=400010,LO=100010,NU=1e6+5;
    struct tree{
        int w,f,id;
        int t[MAX];
    };
    int tt,n,an[NU],iu[NU],xx[NU];
    char c[LO],s[LO];
    bool m[NU];
    queue <int> q;
    inline int f(char c){return c-'a';}
    struct AC{
        tree t[Tr];
        int num;
        int o[Tr];
        inline void FI(){
            register int i,j;
            for (i=0;i<=num;i++)
            for (j=0;j<MAX;j++)
            t[i].t[j]=0;
            for (i=0;i<=num;i++) t[i].w=t[i].f=t[i].id=o[i]=0;
            num=0;
        }
        inline void in(int nu){
            int p=0,l,mm=strlen(c);iu[nu]=mm;
            for (register int i=0;i<mm;i++){
                l=f(c[i]);
                if (!t[p].t[l]) t[p].t[l]=++num;
                p=t[p].t[l];
            }
            if (t[p].id) xx[nu]=t[p].id;else
            t[p].id=nu;
        }
        inline void mafa(){
            register int i;int k,p;
            q.push(0);t[0].f=0;
            while(!q.empty()){
                k=q.front();q.pop();
                for (i=0;i<MAX;i++)
                if (t[k].t[i]){
                    p=t[k].f;
                    while((!t[p].t[i])&&p) p=t[p].f;
                    t[t[k].t[i]].f=(k==p)?0:t[p].t[i];
                    q.push(t[k].t[i]);
                }
            }
        }
        inline void que1(){
            register int i,j;
            int p=0,x,mm=strlen(s);
            for (i=0;i<mm;i++){
                x=f(s[i]);
                while(!t[p].t[x]&&p) p=t[p].f;
                p=t[p].t[x];
                   for (j=p;j;j=t[j].f) t[j].w++;
            }
            for (i=0;i<=num;i++)
            if (t[i].id) an[t[i].id]=t[i].w;
        }
        inline void que2(){
            register int i,j;
            int p=0,x,mm=strlen(s);
            for (i=0;i<mm;i++){
                x=f(s[i]);
                while(!t[p].t[x]&&p) p=t[p].f;
                p=t[p].t[x];
                   for (j=p;j;j=t[j].f)
                if (t[j].id&&o[j]+iu[t[j].id]<=i+1) t[j].w++,o[j]=i+1;
            }
            for (i=0;i<=num;i++)
            if (t[i].id) an[t[i].id]=t[i].w;
        }
    }T1,T2;
    int main(){
        //freopen("a.in","r",stdin);
        //freopen("a.out","w",stdout);
        register int i,j;tt=0;
        while(~scanf("%s",&s)){
            tt++;
            T1.FI();T2.FI();
            scanf("%d",&n);
            for (i=1;i<=n;i++) xx[i]=i;
            for (i=1;i<=n;i++){
                scanf("%d",&m[i]);scanf("%s",c);
                if (!m[i]) T1.in(i);else T2.in(i);
            }
            T1.mafa();
            T2.mafa();
            T1.que1();
            T2.que2();
            printf("Case %d
    ",tt);
            for (i=1;i<=n;i++) printf("%d
    ",an[xx[i]]);
            printf("
    ");
        }
    }
    View Code
  • 相关阅读:
    函数进阶,递归,二分法查找
    内置函数
    IDEA使用maven创建web工程并完善的过程
    后端传入前端的数据的属性名全部为小写的解决方法
    今日总结,复习了很多知识
    org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'ztreeoneServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; 错误的解决方法
    xxx cannot be resolved to a type 的可能的解决方法,mybatis的Example类不存在
    记录一下Spirng Initializr初始化项目的时候pom文件的内容
    使用nacos进行服务注册的配置
    org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing问题的一种解决方法参考
  • 原文地址:https://www.cnblogs.com/Enceladus/p/5317444.html
Copyright © 2020-2023  润新知