摘要： ```c++ #include #include #include using namespace std; const int N = 8; vector s; bool flag[N] = {false}; int a[N]; void help(int index) { if (index == N + 1) { for (int j = 1; j <= N; ++j) { for (int 阅读全文

摘要： ```c++ #include using namespace std; int n1; int nums[99]; int help(int i, int sum) { if (sum == 0) return 1; if (sum n1) return 0; return help(i + 1, sum - nums[i]) + help(i + 1, sum); } int main() { 阅读全文