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- #include <bits/stdc++.h>
- using namespace std;
- #define PB push_back
- #define ZERO (1e-10)
- #define INF (1<<30)
- #define CL(A,I) (memset(A,I,sizeof(A)))
- #define DEB printf("DEB!\n");
- #define D(X) cout<<" "<<#X": "<<X<<endl;
- #define EQ(A,B) (A+ZERO>B&&A-ZERO<B)
- typedef long long ll;
- typedef pair<ll,ll> pll;
- typedef vector<int> vi;
- typedef pair<int,int> ii;
- #define IN(n) int n;scanf("%d",&n);
- #define FOR(i, m, n) for (int i(m); i < n; i++)
- #define REP(i, n) FOR(i, 0, n)
- #define F(n) REP(i, n)
- #define FF(n) REP(j, n)
- #define FT(m, n) FOR(k, m, n)
- #define aa first
- #define bb second
- void ga(int N,int *A){F(N)scanf("%d",A+i);}
- #define MX (1<<20)
- #define IS(A) ((cn[A>>6]>>(A&63))&1)
- #define ST(A) (cn[A>>6]|=1ULL<<((A&63)))
- ll P[1<<20]={2},L(1),cn[1<<14];
- void gen(){
- ST(0),ST(1);
- int Q(1+sqrt(MX));
- for(ll i(4);i<MX;i+=2)ST(i);
- for(int k(3);k<=Q;k+=2)if(!IS(k))
- for(ll h(k<<1),j(k*k);j<MX;j+=h)ST(j);
- for(int i(3);i<MX;i+=2)if(!IS(i))P[L++]=i;
- }
- bool dgP(int a){
- if(IS(a))return 0;
- int S(0);
- while(a)S+=a%10,a/=10;
- return !IS(S);
- }
- int H[MX],a,b;
- int main(void){
- gen();
- FT(1,MX)H[k]=dgP(k)+H[k-1];
- IN(tt)F(tt)scanf("%d%d",&a,&b),printf("%d\n",H[b]-H[a-1]);
- return 0;
- }
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