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- #include <iostream>
- #define LL long long int
- using namespace std;
- LL n;
- bool EsteDivizor;
- int main()
- {
- LL n;
- cin>>n;
- LL DivMax=0 ;
- for(LL i=2;i*i<=n;++i) /// Ciur
- if(n%i==0)
- {
- EsteDivizor=true;
- for(LL j=2;j*j<=i;++j)
- if(i%j==0)
- {
- EsteDivizor=false;
- break;
- }
- if(EsteDivizor)
- if(i>DivMax)
- DivMax=i;
- while(n%i==0)
- n/=i;
- }
- if(n>1)
- if(n>DivMax)
- DivMax=n;
- cout<<DivMax;
- return 0;
- }
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