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Simplify Path.cpp
57 lines (53 loc) · 1.02 KB
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Simplify Path.cpp
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#include "util.h"
class Solution {
public:
string simplifyPath(string path) {
stack<string> directories;
pathToDirectories(directories, path);
string answer;
directoriesToPath(answer, directories);
return answer;
}
void pathToDirectories(stack<string> &directories, string &path)
{
string name;
path += '/';
for(int i = 0; i < (int)path.size(); i++)
{
if(path[i] == '/')
{
if(!name.empty())
{
if(name[0] == '.' && name.size() == 2 && name[1] == '.')
{
if(!directories.empty())
{
directories.pop();
}
}
else if(!(name[0] == '.' && name.size() == 1))
{
directories.push(name);
}
name.clear();
}
}
else
name += path[i];
}
}
void directoriesToPath(string &answer, stack<string> &directories)
{
while(!directories.empty())
{
answer = '/' + directories.top() + answer;
directories.pop();
}
if(answer.empty())
answer = "/";
}
void test()
{
cout << simplifyPath("/a/./b/../../c/") << endl;
}
};