超级幂 (Super Power,UVa 11752)
1 #include <iostream> 2 #include <string.h> 3 #include <string> 4 #include <fstream> 5 #include <algorithm> 6 #include <stdio.h> 7 #include <vector> 8 #include <queue> 9 #include <set> 10 #include <cmath> 11 using namespace std; 12 const double eps = 1e-8; 13 const int INF=0x7fffffff; 14 unsigned long long uINF = ~0LL; 15 #define MAXN 10000007 16 typedef unsigned long long LL; 17 LL vis[MAXN]; 18 LL prime[MAXN]; 19 20 void sieve(LL n) 21 { 22 LL m=(LL)sqrt(n+0.5); 23 memset(vis,0,sizeof(vis)); 24 for(LL i=2;i<=m;i++)if(!vis[i]) 25 for(LL j=i*i;j<=n;j+=i)vis[j]=1; 26 } 27 28 LL gen_prime(LL n) 29 { 30 sieve(n); 31 LL c=0; 32 for(LL i=2;i<=n;i++)if(!vis[i]) 33 prime[c++]=i; 34 return c; 35 } 36 37 LL gcd(LL a,LL b) 38 { 39 return b==0?a:gcd(b,a%b); 40 } 41 42 set<LL> ans; 43 int main() 44 { 45 LL temp=uINF; 46 LL pn=gen_prime(77); 47 LL cn=0; 48 bool comp[64]={0}; 49 LL tempn=0; 50 for(LL i=2;i<64;i++) 51 if(i<prime[tempn])comp[i]=1; 52 else tempn++; 53 //for(LL i=0;i<64;i++)if(comp[i])cout<<i<<' ';system("pause"); 54 ans.insert(1); 55 for(LL i=2;i<=65536;i++) 56 { 57 LL a=i*i*i,j=3; 58 while(a<=uINF/i) 59 { 60 a*=i; 61 j++; 62 if(comp[j])ans.insert(a); 63 64 } 65 66 } 67 for(set<LL>::iterator it=ans.begin();it!=ans.end();it++) 68 {if(*it)cout<<*it<<endl;} 69 70 return 0; 71 }
枚举65536以内数的合数幂
