下面程序的输出为：
int main() {
int N = 15, cnt = 0;
for (int x = 1; x + x + x <= N; x++)
for (int y = x; x + y + y <= N; y++)
for (int z = y; x + y + z <= N; z++)
cnt++;
cout << cnt << endl;
return 0;
}
- A. 45
- B. 102
- C. 174
- D. 3375
正确答案：B