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- #include <iostream>
- #define MOD 777013
- using namespace std;
- int main()
- {
- int n,a,b,c,i;
- cin>>n;
- a=26;
- b=26*26;
- if(n==1)
- {
- cout<<a<<'\n';
- return 0;
- }
- if(n==2)
- {
- cout<<b<<'\n';
- return 0;
- }
- for(i=3;i<=n;++i)
- c=25*(a+b)%MOD,a=b,b=c;
- cout<<c<<'\n';
- return 0;
- }
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