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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. long long a,b,c;
  4. long long nhan(long long a, long long b, long long c)
  5. {
  6. if(b==0ll) return 0ll;
  7. long long t = nhan(a,b/2,c);
  8. if(b%2==0)
  9. {
  10. return (t+t)%c;
  11. }
  12. else
  13. {
  14. return ((t+t)%c + a%c)%c;
  15. }
  16. }
  17. int main()
  18. {
  19. ios_base::sync_with_stdio(0);
  20. cin.tie(0);
  21. cin >> a >> b >> c;
  22. cout << nhan(a,b,c);
  23. }
  24.  
Success #stdin #stdout 0.01s 5320KB
stdin
Standard input is empty
stdout
Standard output is empty