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GCJ1C09A - All Your Base


Ref Link

#include <iostream>
#include <map>
#include <string>
#include <algorithm>

using namespace std;

map<char,int> memo;

int main()
{
    int t, next;
    string s;

    cin >> t;
    for(int k = 1; k <= t; k++)
    {
        cin >> s;

        memo.clear();
        // number does not start with 0 so min value for the first char is 1
        memo[s[0]] = 1;

        //next value to assign to a symbol
        next = 0;
        for(int i = 1; i < s.size(); i++)
        {
            if(memo.count(s[i]) == 0)
            {
                memo[s[i]] = next++;

                // 1 is already used so increment next value once again
                if(next == 1)
                {
                    next++;
                }
            }
        }

        long long value = 0;

        // base will be number of unique character in the string or the highest value assigned to any character
        int base = (next == 0) ? 2 : next;

        for(int i = 0; i < s.size(); i++)
        {
           value = value * base + memo[s[i]];
        }

        cout << "Case #" << k << ": " << value << endl;

    }
    return 0;
}

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