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Leetcode20.cpp
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69 lines (54 loc) · 1.56 KB
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// Leetcode20.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
#include <string>
#include <vector>
using namespace::std;
char getAnother(char s)
{
if (s == '}')
return '{';
if (s == ']')
return '[';
if (s == ')')
return '(';
return {};
}
bool isValid(string s)
{
vector<char> data; //stack<char> st;
for (auto ch : s)
{
if (ch == '{' || ch == '(' || ch == '[')
{
data.push_back(ch);
}
else
{
if (0 == data.size())
return false;
if (data.back() != getAnother(ch))
return false;
else
data.pop_back();
}
}
if (data.size())
return false;
return true; //return data.empty()
}
int main()
{
string s = "()[]{}";
bool res = isValid(s);
std::cout << "Hello World!\n";
}
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file