Cod sursa(job #2660157)

Utilizator cristi_macoveiMacovei Cristian cristi_macovei Data 18 octombrie 2020 13:45:36
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.59 kb
#include <iostream>
#include <fstream>

const int64_t MOD = 1999999973;

int64_t log_pow (int64_t base, int exp) {
  if (exp == 0)
    return 1;
  if (exp % 2 == 1)
    return (base * log_pow(base, exp - 1)) % MOD;
  int64_t a = log_pow(base, exp / 2);
  return (a * a) % MOD;
}

int n_pow (int base, int exp) {
  int64_t ans = 1;
  for (int i = 1; i <= exp; ++i)
    ans = (ans * base) % MOD;
  return ans;
}

int main() {
  std::ifstream in("lgput.in");
  std::ofstream out("lgput.out");
  int base, exp;

  in >> base >> exp;
  out << log_pow(base, exp);

  in.close();
  out.close();
  return 0;
}