题解 | #百钱买百鸡问题#

#include <stdio.h>
#include <string.h>

/*
15x+9y+z=300        
x+y+z=100 
==> 14x+8y=200 ==> 7x+4y=100
*/

int main(){

    int x, y, z;
    x = y = z = 0;

    for(x = 0; x <= 20; x++){
        if((100 - 7 * x) % 4 == 0){
            y = (100 - 7 * x) / 4; 
            z = 100 - x - y;
            if(x >= 0 && y >= 0 && z >= 0)
                printf("%d %d %d\n", x, y, z);
        }        
    }
    
    return 0;
}