不知道这个为什么只有10% #include <iostream> using namespace std; int QuickSort(int n) {  if (n<0 || n>200)   return -1;  int sum = 0;   int cur =n%9;   sum = n / 9;   if (cur == 0)    return sum;   if (cur % 4 == 0)   {    sum += (cur / 4);    return sum;   } else {   while (cur < n)   {    sum -= 1;    cur += 9;    if (cur % 4 == 0)    {     sum += (cur / 4);     break;    }   } }   return sum==0?-1:sum;     } int main() {  int n;  cin >> n;  int res = QuickSort(n);  cout << res; }