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Choose and Swap.cpp
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Choose and Swap.cpp
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// { Driver Code Starts
#include<bits/stdc++.h>
using namespace std;
// } Driver Code Ends
class Solution{
public:
string chooseandswap(string str){
int n = str.size();
set<char> s;
for(int i = 0; i < n; i++)
{
s.insert(str[i]);
}
for(int i = 0; i < n; i++)
{
s.erase(str[i]);
auto it = s.begin();
if(it == s.end())
break;
char c = *it;
if(c < str[i])
{
char c1 = str[i];
for(int j = 0; j < n; j++)
{
if(str[j] == c1)
{
str[j] = c;
}
else if(str[j] == c)
{
str[j] = c1;
}
}
break;
}
}
return str;
}
};
// { Driver Code Starts.
int main()
{
Solution obj;
int t;
cin >> t;
while(t--)
{
string a;
cin >> a;
cout << obj.chooseandswap(a) << endl;
}
return 0;
}
// } Driver Code Ends