摘要:
网上找的,慢慢研究下View Code 1 #include <cmath> 2 #include <complex> 3 #include <cstring> 4 using namespace std; 5 6 const double PI = acos(-1); 7 typedef complex<double> cp; 8 typedef long long int64; 9 10 const int N = 1 << 16; 11 int64 a[N], b[N], c[N << 1]; 12 13 void 阅读全文