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- #include <iostream>
- #define M 123457
- using namespace std;
- int lgput(int n,int p)
- {
- long long int a=n,P=1;
- for(int i=0;(1<<i)<=p;++i) /// Luam toti biti lui p la rand
- {
- if(((1<<i)&p)>0) /// Daca bitul i din p este 1 atunci adaugam n^(2^i) la solutie
- P=(P*a)%M;
- a=(a*a)%M; /// Inmultim a cu a ca sa obtinem n^(2^(i+1))
- }
- return P;
- }
- int main()
- {
- int n;
- cin>>n;
- if(n==0)
- {
- cout<<0;
- return 0;
- }
- if(n==1)
- {
- cout<<10;
- return 0;
- }
- int sol=1LL*(1LL*n*5+4)%M*lgput(5,n-1)%M;
- cout<<sol%M;
- return 0;
- }
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