void solve(int a,vector<int> &ans){ if(a==4){ ans.push_back(2); ans.push_back(2); return ; } //mereko even number as a sum of two prime number likhna hai for(int k=a-3;k>=3;k-=2){ if(isPrime(k)&& isPrime(a-k)){ ans.push_back(k); ans.push_back(a-k); return ; } } return; }
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