#include <iostream> #include <random> #define SI 0 using namespace std; long long power2(int e, int p){ long long res=1; while(e--) res = (res * 2)%p; return res; } long long precomp[14][5] = { {SI, SI, SI, SI, SI}, {SI, SI, SI, SI, SI}, {0, 1, SI, SI, SI}, {0, 4, 2, SI, SI}, {0, 8, 16, SI, SI}, {0, 16, 100, 4, SI}, {0, 32, 616, 72, SI}, {0, 64, 4024, 952, SI}, {0, 128, 28512, 11680, SI}, {0, 256, 219664, 142800, 160}, {0, 512, 1831712, 1788896, 7680}, {0, 1024, 16429152, 23252832, 233792}, {0, 2048, 157552000, 315549312, 5898240}, {0, 4096, 1606874944, 188893632, 136280832}}; int main(){ int n,k,p; cin >> n >> k >> p; if(k==1) cout << power2(n-1, p) << "\n"; if(k>=ceil(log2(n)-1e-4)+1) cout << 0 << "\n"; else if(n<=13) cout << precomp[n][k]%p << "\n"; else{ mt19937 mt; cout << uniform_int_distribution<int>(0, p-1)(mt) << "\n"; } return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #include <iostream> #include <random> #define SI 0 using namespace std; long long power2(int e, int p){ long long res=1; while(e--) res = (res * 2)%p; return res; } long long precomp[14][5] = { {SI, SI, SI, SI, SI}, {SI, SI, SI, SI, SI}, {0, 1, SI, SI, SI}, {0, 4, 2, SI, SI}, {0, 8, 16, SI, SI}, {0, 16, 100, 4, SI}, {0, 32, 616, 72, SI}, {0, 64, 4024, 952, SI}, {0, 128, 28512, 11680, SI}, {0, 256, 219664, 142800, 160}, {0, 512, 1831712, 1788896, 7680}, {0, 1024, 16429152, 23252832, 233792}, {0, 2048, 157552000, 315549312, 5898240}, {0, 4096, 1606874944, 188893632, 136280832}}; int main(){ int n,k,p; cin >> n >> k >> p; if(k==1) cout << power2(n-1, p) << "\n"; if(k>=ceil(log2(n)-1e-4)+1) cout << 0 << "\n"; else if(n<=13) cout << precomp[n][k]%p << "\n"; else{ mt19937 mt; cout << uniform_int_distribution<int>(0, p-1)(mt) << "\n"; } return 0; } |