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FirstUniqueCharacterInaString.cpp
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59 lines (42 loc) · 1.12 KB
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#include <iostream>
#include <unordered_map>
#include <bits/stdc++.h>
/*
*
* Given string find firt non repeating unique character if there is none return -1
*
* leetcode returns 0
* loveleetcode returns 2
*
* */
using namespace std;
class Solution
{
public:
int firstUniqueCharacterInString(string &str)
{
std::unordered_map<char, int> map;
int ans = INT_MAX;
for(int i=0; i<str.size(); i++)
{
if(map.find(str[i]) == map.end())
{
map[str[i]] = i;
}
else
{
map[str[i]] = INT_MAX;
}
}
for(auto s : map)
ans = min(s.second, ans);
return (ans == INT_MAX) ? -1 : ans;
}
};
int main()
{
string str = "loveleetcode";
Solution s;
std::cout<<s.firstUniqueCharacterInString(str)<<std::endl;
return 0;
}