#include<iostream>
#include<list>
using namespace std;
bool in_the_range(char a)
{
    if (a >= 'a'&&a <= 'z')
    {
        return true;
    }
    else
    {
        return false;
    }
}

int chance_one_symb(char in_symbol, char out_sybmbol)
{
    if ((in_the_range(in_symbol) && in_the_range(out_sybmbol)) || !(in_the_range(in_symbol)) && !(in_the_range(out_sybmbol)))
    {
        if (in_symbol == out_sybmbol)
        {
            return 0;
        }
        else
        {
            return 5;
        }
    }
    else
    {
        if (((int)in_symbol + 32) == out_sybmbol || ((int)in_symbol - 32) == out_sybmbol)
        {
            return 5;
        }
        else
        {
            return 10;
        }
    }


}

int main()
{
    char str[200] = { NULL };
    const char word[6] = { 'S', 'a', 'n', 'd', 'r', 'o' };
    int final_cost = 60, temp_cost = 0;
    cin.get(str, 200);
    list<char> temp;
    list<char>::iterator ptr;
    for (size_t i = 0; i < 6; i++)
    {
        temp.push_back(str[i]);
    }
    int j = 0;
    for (size_t i = 6; i <= strlen(str); i++)
    {
        for (ptr=temp.begin(); ptr!=temp.end(); ptr++)
        {
            temp_cost += chance_one_symb(*ptr, word[j]);
            if (temp_cost>=final_cost)
            {
                break;
            }
            j++;
        }
        j = 0;
        if (temp_cost < final_cost)
        {
            final_cost = temp_cost;
        }
        temp_cost = 0;
        temp.pop_front();
        temp.push_back(str[i]);


    }
    cout << final_cost;
    return 0;
}

Edited by author 14.07.2016 22:33

Seeing a similar code on other tasks previously, i can already tell the problem by intuition.
Try something like <194 symbols>Sandro.

Thank you