leetcode/src/simplifyPath/simplifyPath.cpp at master · AndyleeSharp/leetcode · GitHub

History

86 lines (71 loc) · 1.92 KB

Raw

// Source : https://oj.leetcode.com/problems/simplify-path/

// Author : Hao Chen

// Date : 2014-10-09

/**********************************************************************************

* Given an absolute path for a file (Unix-style), simplify it.

* For example,

* path = "/home/", => "/home"

* path = "/a/./b/../../c/", => "/c"

* Corner Cases:

* Did you consider the case where path = "/../"?

* In this case, you should return "/".

* Another corner case is the path might contain multiple slashes '/' together, such as "/home//foo/".

* In this case, you should ignore redundant slashes and return "/home/foo".

**********************************************************************************/

#include <iostream>

#include <string>

#include <vector>

#include <sstream>

using namespace std;

vector<string> &split(const string &s, char delim, vector<string> &elems) {

stringstream ss(s);

string item;

while (getline(ss, item, delim)) {

elems.push_back(item);

}

return elems;

}

vector<string> split(const string &s, char delim) {

vector<string> elems;

split(s, delim, elems);

return elems;

}

string simplifyPath(string path) {

string result;

vector<string> elems = split(path, '/');

int ignor = 0;

for(int i=elems.size()-1; i>=0; i--) {

if (elems[i]=="" || elems[i]=="." ){

continue;

}

if (elems[i]==".."){

ignor++;

continue;

}

if (ignor>0){

ignor--;

continue;

}

if (result.size()==0){

result = "/" + elems[i];

}else{

result = "/" + elems[i] + result;

}

return result.size() ? result : "/";

}

int main(int argc, char** argv)

{

string path("/a/./b/../../c/");

if (argc > 1 ){

path = argv[1];

}

cout << path << " : " << simplifyPath(path) << endl;

}

leetcode/src/simplifyPath/simplifyPath.cpp at master · AndyleeSharp/leetcode · GitHub

Expand file tree

Breadcrumbs

simplifyPath.cpp

Latest commit

History

Breadcrumbs

simplifyPath.cpp

File metadata and controls