Submission #420587
Source Code Expand
#include <iostream> #include <complex> #include <vector> #include <algorithm> using namespace std; typedef complex<long double> CMP; static const long double PI = atan((long double)1)*4; CMP tmp[65536*4]; template<int F> void fft_impl( CMP a[], int n, int stride = 1 ) { if( n > 1 ) { CMP *ev=a, *od=a+stride; int s2=stride*2, n2=n/2; fft_impl<F>( ev, n2, s2 ); fft_impl<F>( od, n2, s2 ); for(int i=0; i<n; ++i) tmp[i] = ev[s2*(i%n2)] + od[s2*(i%n2)]*polar((long double)1.0, F*2*PI*i/n); for(int i=0; i<n; ++i) a[stride*i] = tmp[i]; } } void fft( vector<CMP>& a ) { fft_impl<+1>(&a[0], a.size()); } void ifft( vector<CMP>& a ) { fft_impl<-1>(&a[0], a.size()); for(int i=0; i<a.size(); ++i) a[i] /= a.size(); } int main() { int N; cin>>N; int Z=1; while(Z<1+2*N) Z*=2; vector<CMP> A(Z), B(Z), C(Z); for(int i=1; i<=N; ++i) { double a, b; cin>>a>>b; A[i] = a; B[i] = b; } fft(A); fft(B); for(int i=0; i<Z; ++i) C[i] = A[i]*B[i]; ifft(C); for(int k=1; k<=2*N; ++k) cout << int(round(abs(C[k]))) << endl; }
Submission Info
Submission Time | |
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Task | C - 高速フーリエ変換 |
User | cafelier |
Language | C++11 (GCC 4.9.2) |
Score | 100 |
Code Size | 1110 Byte |
Status | AC |
Exec Time | 3154 ms |
Memory | 33592 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 100 / 100 | ||||
Status |
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|
Set Name | Test Cases |
---|---|
Sample | 00_sample_01 |
All | 00_sample_01, 01_00_01, 01_01_19, 01_02_31, 01_03_22, 01_04_31, 01_05_40, 01_06_15, 01_07_39, 01_08_28, 01_09_30, 01_10_23, 01_11_33, 01_12_11, 01_13_28, 01_14_41, 01_15_26, 01_16_49, 01_17_34, 01_18_02, 01_19_33, 01_20_29, 02_00_51254, 02_01_82431, 02_02_17056, 02_03_34866, 02_04_6779, 02_05_65534, 02_06_65535, 02_07_65536, 02_08_65537, 02_09_65538, 02_10_100000 |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
00_sample_01 | AC | 48 ms | 8932 KB |
01_00_01 | AC | 41 ms | 8988 KB |
01_01_19 | AC | 44 ms | 8988 KB |
01_02_31 | AC | 45 ms | 8996 KB |
01_03_22 | AC | 44 ms | 8992 KB |
01_04_31 | AC | 42 ms | 8996 KB |
01_05_40 | AC | 48 ms | 8992 KB |
01_06_15 | AC | 45 ms | 8948 KB |
01_07_39 | AC | 45 ms | 9004 KB |
01_08_28 | AC | 48 ms | 9004 KB |
01_09_30 | AC | 45 ms | 8964 KB |
01_10_23 | AC | 44 ms | 9004 KB |
01_11_33 | AC | 41 ms | 8924 KB |
01_12_11 | AC | 45 ms | 8924 KB |
01_13_28 | AC | 43 ms | 8988 KB |
01_14_41 | AC | 62 ms | 8964 KB |
01_15_26 | AC | 48 ms | 8920 KB |
01_16_49 | AC | 43 ms | 8996 KB |
01_17_34 | AC | 44 ms | 8988 KB |
01_18_02 | AC | 46 ms | 8972 KB |
01_19_33 | AC | 44 ms | 8992 KB |
01_20_29 | AC | 43 ms | 8984 KB |
02_00_51254 | AC | 1462 ms | 21216 KB |
02_01_82431 | AC | 2910 ms | 33572 KB |
02_02_17056 | AC | 635 ms | 15136 KB |
02_03_34866 | AC | 1409 ms | 21276 KB |
02_04_6779 | AC | 195 ms | 10528 KB |
02_05_65534 | AC | 1518 ms | 21212 KB |
02_06_65535 | AC | 1534 ms | 21276 KB |
02_07_65536 | AC | 2886 ms | 33560 KB |
02_08_65537 | AC | 2930 ms | 33572 KB |
02_09_65538 | AC | 2965 ms | 33592 KB |
02_10_100000 | AC | 3154 ms | 33572 KB |