CheckerCorrectitud

#include <iostream>
#include <vector>
#include <sstream>
#include <fstream>
#include "BigNumber.h"

using namespace std;

long long toLL(string s)
{
    stringstream ss;
    ss << s;
    long long n;
    ss >> n;
    return n;
}

int main()
{
    ifstream casos("casosCorrectitud.txt");
    int cant;
    casos >> cant;

    int fallidos = 0;

    for(int i=0; i<cant; i++)
    {
        string a, b;
        long long la, lb;
        casos >> a >> b;

        BigNumber na(a);
        BigNumber nb(b);

        la = toLL(a);
        lb = toLL(b);

        BigNumber resBN = na*nb;
        long long resLL = la*lb;

        if(toLL(resBN.toStr()) != resLL)
        {
            fallidos++;
        }
    }

    cout << "Fallidos: " << fallidos << endl;

    return 0;
}