题解 | x_to_y_2

#include <stdio.h>

int main() {
    int T = 0;
    scanf("%d", &T);
    while (T--) {
        long long x = 0;
        long long y = 0;
        scanf("%lld %lld", &x, &y);
        int ans = 0;
        while ((x | y) != y) {
            x >>= 1;
            ans++;
        }
        if (x != y) {
            ans++;
        }
        printf("%d\n", ans);
    }
    return 0;
}