题解 | 买橘子
买橘子
https://www.nowcoder.com/practice/73e0552b78474a9086781e47f4e01d73
#include <stdio.h>
int main() {
int n;
scanf("%d",&n);
if(n%2==1){
printf("-1");
return 0;
}
int cnt=n/8,sum=cnt*8;
int need=n-sum;
if(need==0)printf("%d",cnt);
else if((6-need)/2<=cnt){
printf("%d",cnt+1);
}
else printf("-1");
return 0;
return 0;
}
