# Write a function to find maximum run of uppercase characters in the given string.
def max_run_uppercase(test_str):
    cnt = 0
    res = 0
    for idx in range(0, len(test_str)):
        if test_str[idx].isupper():
            cnt += 1
        else:
            res = cnt
            cnt = 0
    if test_str[len(test_str) - 1].isupper():
        res = cnt
    return res
