4 solutions
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0
#include #include using namespace std; int isprime(long long k) { long long i; if(k<=1){ return 0; } else if(k<=3){ return 1; } else if(k%20||k%30){ return 0; } else{ for(i=5;ii<=k;i+=6){ if(k%i==0||k%(i+2)==0){ return 0; } } } return 1; } int main() { int t; long long a,b; cin>>t; while(t--){ cin>>a>>b; if(isprime(ab)){ cout<<"YES\n"; } else{ cout<<"NO\n"; } } return 0; }
Information
- ID
- 22
- Time
- 1000ms
- Memory
- 256MiB
- Difficulty
- 8
- Tags
- # Submissions
- 723
- Accepted
- 104
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