功能:百马百担问题:有100匹马,驮100担货,大马驮三担,中马驮2担,两匹小马驮一担,求大,中,小马各多少匹?

功能:百马百担问题:有100匹马,驮100担货,大马驮三担,中马驮2担,两匹小马驮一担,求大,中,小马各多少匹?
#include <stdio.h>
int main()
{
int hb,hm,hl,n=0;
for(hb=0;hb<=100;hb+=__(1)__)
for(hm=0;hm<=100-hb;hm+=__(2)__)
{
hl=100-hb-__(3)__;
if(hb/3+hm/2+2*hl==100)
{
n++;
printf("hb=%d,hm=%d,hl=%d\n",hb/3,hm/2,__(4)__);
}
}
printf("n=%d\n",n);
}
请大神指教(1,),(2),(3),(4)的答案,谢谢!!!

(1):3
(2):2
(3):hm
(4):2*hl

程序运行结果:
hb=2,hm=30,hl=68
hb=5,hm=25,hl=70
hb=8,hm=20,hl=72
hb=11,hm=15,hl=74
hb=14,hm=10,hl=76
hb=17,hm=5,hl=78
hb=20,hm=0,hl=80
n=7
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