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 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 int num[100001]; 42 int main() 43 { 44 int a,b; 45 int temp=1; 46 memset(num,0,sizeof(num)); 47 for(LL i=1;i<100001;i++) 48 { 49 if(i==(LL)(temp*temp)){num[temp++]=i;} 50 //cout<<num[i]<<endl;system("pause"); 51 } 52 while(scanf("%d%d",&a,&b),a+b!=0) 53 { 54 int sa=sqrt(a); 55 int sb=sqrt(b); 56 //cout<<sa<<' '<<sb<<endl; 57 int ans=sb-sa; 58 if(a==num[sa])ans++; 59 //if(b==num[sb])ans++; 60 printf("%d ",ans); 61 } 62 63 return 0; 64 }
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 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 int num[100001]; 42 int main() 43 { 44 int a,b; 45 int temp=1; 46 memset(num,0,sizeof(num)); 47 for(LL i=1;i<100001;i++) 48 { 49 if(i==(LL)(temp*temp)){num[temp++]=i;} 50 //cout<<num[i]<<endl;system("pause"); 51 } 52 while(scanf("%d%d",&a,&b),a+b!=0) 53 { 54 int sa=sqrt(a); 55 int sb=sqrt(b); 56 //cout<<sa<<' '<<sb<<endl; 57 int ans=sb-sa; 58 if(a==num[sa])ans++; 59 //if(b==num[sb])ans++; 60 printf("%d ",ans); 61 } 62 63 return 0; 64 }