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UVA 1556 - Disk Tree(Trie)

UVA 1556 - Disk Tree

题目链接

题意:给定一些字符串,表示目录,要求输出整体目录的结构

思路:跟Trie树差不多,只不过是每个结点存放的是一个字符串,利用map映射即可

代码:

#include <cstdio>
#include <cstring>
#include <algorithm>
#include <vector>
#include <string>
#include <map>
#include <iostream>
using namespace std;

const int N = 40005;
int n;
char str[85];

struct Node {
    string name;
    map<string, int> vis;
} node[N];

int sz;

void insert(char *str) {
    int len = strlen(str);
    str[len] = '\\';
    int u = 0;
    for (int i = 0; i <= len; i++) {
	string tmp = "";
	while (str[i] != '\\') {
	    tmp += str[i];
	    i++;
	}
	if (!node[u].vis.count(tmp)) {
	    node[sz].vis.clear();
	    node[sz].name = tmp;
	    node[u].vis[tmp] = sz++;
	}
	u = node[u].vis[tmp];
    }
}

void init() {
    sz = 1;
    node[0].vis.clear();
    while (n--) {
	scanf("%s", str);
	insert(str);
    }
}

void print(int u, int d) {
    if (u) {
	for (int i = 0; i < d; i++)
	    printf(" ");
	cout << node[u].name << endl;
    }
    for (map<string, int>::iterator it = node[u].vis.begin(); it != node[u].vis.end(); it++) {
	print(it->second, d + 1);
    }
}

int main() {
    while (~scanf("%d", &n)) {
	init();
	print(0, -1);
	printf("\n");
    }
    return 0;
}