42 lines
721 B
C++
42 lines
721 B
C++
#include <iostream>
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#include <cstring>
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#include <cmath>
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#include <string>
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#include <algorithm>
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#include <map>
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using namespace std;
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bool prime(__int64 a)
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{
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__int64 i;
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for(i=2;i*i<=a;i++)
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{
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if(a%i == 0)return false;
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}
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return true;
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}
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bool q_pow(__int64 a,__int64 b)
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{
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__int64 res=1,mod=b,carry=a;
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while(b)
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{
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if(b%2)
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{
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res=res*a%mod;
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}
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a=a*a%mod;
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b>>=1;
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}
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if(res == carry)return true;
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else return false;
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}
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int main()
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{
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__int64 p,a;
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while(~scanf("%I64d %I64d",&p,&a),p+a)
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{
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if(!prime(p) && q_pow(a,p))puts("yes");
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else puts("no");
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}
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return 0;
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}
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