TheAlgorithms-C/project_euler/problem_9/sol1.c

#include <stdio.h>

int main(void)
{
    for (int a = 1; a < 300; a++)
        for (int b = a+1; b < 400; b++)
            for (int c = b+1; c < 500; c++)
            {
                if (a * a + b * b == c * c)
                    if (a + b + c == 1000)
                    {
                        printf("%d x %d x %d = %ld\n", a, b, c, (long int) a*b*c);
                        return 0;
                    }
            }

    return 0;
}