数学趣题——排列组合

#include <stdio.h>

int main()
{
    int red, yellow, green;
    for (red=0; red<=3; ++red)
        for (yellow=0; yellow<=3; ++yellow)
            for (green=2; green<=6; ++green)
                if(red + yellow + green == 8)
                    printf("%d   %d    %d\n", red, yellow, green);
    return 0;
}