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Create ValidParentheses.cpp #74

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22 changes: 22 additions & 0 deletions Stacks&Queues/ValidParentheses.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
class Solution {
public:
bool isValid(string s) {
stack<char> st;
for(int i=0;i<s.length();i++)
{
if(st.empty()||s[i]=='('||s[i]=='['||s[i]=='{')
st.push(s[i]);

else if(s[i]==')'&&st.top()=='('||s[i]=='}'&&st.top()=='{'||s[i]==']'&&st.top()=='[')
st.pop();
else
return false;
}

if(st.empty())
return true;
else return false;
}
};