HDOJ 3460 Ancient Printer

Ancient Printer

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/65536 K (Java/Others)
Total Submission(s): 1935    Accepted Submission(s): 972

Problem Description

The contest is beginning! While preparing the contest, iSea wanted to print the teams' names separately on a single paper.
Unfortunately, what iSea could find was only an ancient printer: so ancient that you can't believe it, it only had three kinds of operations:

● 'a'-'z': twenty-six letters you can type
● 'Del': delete the last letter if it exists
● 'Print': print the word you have typed in the printer

The printer was empty in the beginning, iSea must use the three operations to print all the teams' name, not necessarily in the order in the input. Each time, he can type letters at the end of printer, or delete the last letter, or print the current word. After printing, the letters are stilling in the printer, you may delete some letters to print the next one, but you needn't delete the last word's letters.
iSea wanted to minimize the total number of operations, help him, please.

 

Input

There are several test cases in the input.

Each test case begin with one integer N (1 ≤ N ≤ 10000), indicating the number of team names.
Then N strings follow, each string only contains lowercases, not empty, and its length is no more than 50.

The input terminates by end of file marker.

 

Output

For each test case, output one integer, indicating minimum number of operations.

 

Sample Input

2freeradiantfreeopen

 

Sample Output

21
Hint
The sample's operation is:f-r-e-e-o-p-e-n-Print-Del-Del-Del-Del-r-a-d-i-a-n-t-Print

结果=字符串数+（字典树节点数-1）*2-最长字符串长度。

#include <bits/stdc++.h>using namespace std;#define mst(a,b) memset((a),(b),sizeof(a))#define f(i,a,b) for(int i=(a);i<=(b);++i)const int maxn = 26;const int mod = 1e9+7;const int INF = 1e9;#define ll long long#define rush() int T;scanf("%d",&T);while(T--)struct Trie{    int next[maxn];};int n,Count,Max;Trie word[500010];void init(){    Count=Max=0;    int len=50*n+2;    for(int i=0;i<len;i++)        for(int j=0;j<maxn;j++)            word[i].next[j]=-1;}void createTrie(char *str){    int now=0;    int len=strlen(str);    if(len>Max)        Max=len;    for(int i=0;i<len;i++)    {        int t=str[i]-'a';        if(word[now].next[t]==-1)        {            word[now].next[t]=++Count;//不能是Count++            now=Count;        }        else now=word[now].next[t];    }}int main(){    char str[55];    while(~scanf("%d",&n))    {        init();        for(int i=0;i<n;i++)        {            scanf("%s",str);            createTrie(str);        }        printf("%d\n",n+2*Count-Max);    }    return 0;}