int p,q,r,n;
main() { for(n=3; n<=8; n++) for(p=0; p<=n; p++) for(q=0; q<=n-p; q++) for(r=0; r<=n-p-q; r++) if (r + p + q == n && 2*p + q == 8 - n) {printf("p=%2d\t q=%2d\t r=%2d\t n=%2d\n",p,q,r,n); getch(); } }