解题思路:
注意事项:
参考代码:
#include<stdio.h>
int main()
{
int a,n,m;
while(scanf("%d",&a)){
if (a == 0) {
break;
}
n = a / 3;
a = a % 3;
m = n + a;
while (m >= 3) {
n = n + m / 3;
m = m / 3 + m % 3;
}
if (m == 2) {
n++;
}
printf("%d\n", n);
n = 0;
}
return 0;
}
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