137 lines
3.9 KiB
C++
137 lines
3.9 KiB
C++
#include<stdio.h>
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#include<math.h>
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#include<algorithm>
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#include<iostream>
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using namespace std;
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#include<string.h>
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#define SSS 6000
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#define SIZE 1000000
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#define INF 2000000000
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#define NUM 200
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__int64 aa[300];
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__int64 rr[50000];
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int pri[NUM];
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int sub[SIZE];
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int pdsu(__int64 n)
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{
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__int64 i;
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if(n<=0||n==1 )
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return 0;
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if( n==2)
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return 1;
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else{
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for(i=2; i*i<=n; i++)
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if(n%i==0)
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return 0;
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}
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return 1;
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}
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void sf(){
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int temp,n;
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for(int i=0;i<SIZE;i++)
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sub[i]=1;
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sub[0]=sub[1]=0;
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for(int i=2;i<=sqrt(SIZE);i++){
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if(sub[i]==1){
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temp=2*i;
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while(temp<=SIZE){
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sub[temp]=0;
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temp+=i;
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}
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}
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}
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}
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int init(){
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int j = 0 ;
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pri[j++] = 2 ;
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pri[j++] = 3 ;
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for( int i = 3 ; i<SSS ;i++ ){
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if(sub[i]){
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pri[j++]=i;
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}
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}
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return j;
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}
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int main(){
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int num;
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int t = 0 ;
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__int64 res , next ,next2 ;
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int b;
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sf();
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num = init();
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sf();
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for(int a = 1 ; a< 600 ; a++ ){
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for(int i = 0; i<NUM ;i++ ){
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res = pri[i] ;
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b = pri[i] - a;
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if(b == 0 ) continue;
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next = a * pri[i] + b ;
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if(next == pri[i]) continue;
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if(res * next > INF){
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continue;
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}
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if(next <0 )
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continue;
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if(next >= SIZE){
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if(!pdsu(next))
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continue ;
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}
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else{
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if(!sub[next])
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continue ;
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}
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res = res * next;
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if(res >INF) continue;
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while(1){
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next2 = next * a +b;
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if(next2 == next ) break;
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if(res * next2 > INF){
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break;
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}
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if(next2 <0 )
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break;
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if(next2 >= SIZE){
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if(!pdsu(next2))
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break ;
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}
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else{
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if(!sub[next2])
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break ;
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}
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res = res * next2;
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if(res >INF) break;
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rr[t++] = res ;
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next = next2 ;
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}
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}
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}
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for(int i = 0 ; i<t ;i++ )
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for(int j = i+1 ; j <t ;j++)
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{
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if(rr[i]>rr[j]){
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int temp = rr[i];
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rr[i] = rr[j];
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rr[j] = temp;
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}
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}
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int ccc = 0;
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for(int i = 0 ; i <t ; i++)
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{
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if(rr[i]!= rr[i+1])
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aa[ccc++]=rr[i];
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}
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int N;
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__int64 zuo ,you ;
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scanf("%d",&N);
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while(N--){
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scanf("%I64d%I64d",&zuo,&you);
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int ans = 0 ;
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for(int i = 0 ; i <243 ;i++){
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if(zuo<=aa[i] && you>=aa[i])
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ans++;
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}
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printf("%d\n",ans);
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}
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return 0 ;
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}
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