p8.cpp

#include <iostream>
#include <string>

int main()
{
    std::string s = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450";
    long maxProduct = 0;
    long product = 1;
    int j = 0;
    int max = 13;
    for (int i; i < s.size(); i++)
    {
        j++;
        int current = s[i] - 48;
        product *= current;
        if (current == 0)
        {
            product = 1;
            j = 0;
        }
        if (j == 13)
        {
            j = 12;
            std::cout << maxProduct << std::endl;
            maxProduct = product > maxProduct ? product : maxProduct;
            int trailingValue = s[i - 12] - 48;
            product /= trailingValue;
        }
    }
    std::cout << maxProduct << std::endl;
}