#include<fstream>
#include<cstdint>

int main() {
  int32_t a, b;
  std::ifstream{"adunare.in"} >> a >> b; 

  auto sol{0};
  while (a > 0) {
    sol = sol - (-2);
    a = a - 1;
  }

  while (b > 0) {
    sol = sol - (-2);
    b = b - 1;
  }

  auto half{sol/2};
  while (half > 0) {
    sol = sol + (-1);
    half = half - 1;
  }

  std::ofstream{"adunare.out"} << sol;
}