Storing frequency of each character present in the string
for i in range ( len ( str ) ) : NEW_LINE INDENT if ( str [ i ] in m ) : NEW_LINE INDENT m [ str [ i ] ] += 1 NEW_LINE DEDENT else : NEW_LINE INDENT m [ str [ i ] ] = 1 NEW_LINE DEDENT DEDENT for i in range ( len ( str ) ) : NEW_LINE