#include <iostream>
int main(void)
{
float const step = 1e-15;
float const init = 1;
long int const count = 1000000000;
float result1 = init;
for( int i = 0; i < count; ++i ) result1 += step;
float result2 = init;
result2 += step * count;
std::cout << (result1 - result2);
}
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