#include <stdio.h> int compare(int a,int b) { int count = 0; for (int i = 0; i < 32; i++) { int x = a & (1 << i); int y = b & (1 << i); if (x != y) count++; } return count; } int main() { int a, b; while (scanf("%d %d", &a, &b) != EOF) { int count = compare(a, b); printf("%d\n", count); } return 0; }