#include <iostream>
#include <climits>

const int sum_of(int a, int b){
	int sum = 0, carry = 0;
	for (int i = 0; i <sizeof(int)*CHAR_BIT-1; i++) {
		int a_i = (a >> i) & 0x1;
		int b_i = (b >> i) & 0x1;
		int sum_i = a_i ^ b_i ^ carry;
		carry = (a_i & b_i) | (b_i & carry) | (carry & a_i);
		sum |= sum_i << i;
	}
	return sum;
}

int main(int argc, char *argv[]){
	std::cout<<sum_of(91,14)<<std::endl;
}