java 393. UTF-8 Validation.java
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class Solution(object):
def validUtf8(self, data):
"""
:type data: List[int]
:rtype: bool
"""
if not data :
return False
count = 0
for d in data :
if count == 0:
if (d & 0xF8) == 0xF0 :
count += 3
elif (d & 0xF0) == 0xE0 :
count += 2
elif (d & 0xE0) == 0xC0 :
count += 1
elif (d & 0x80 != 0) :
return False
else :
if (d & 0xC0) != 0x80 :
return False
count -= 1
return count == 0
public class Solution {
public boolean validUtf8(int[] data) {
int count = 0;
for (int d : data) {
if(count == 0) {
if((d & 0xF8) == 0xF0) count += 3;
else if((d & 0xF0) == 0xE0) count += 2;
else if((d & 0xE0) == 0xC0) count += 1;
else if((d & 0x80) != 0) return false;
} else {
if((d & 0xC0) != 0x80) return false;
count--;
}
}
return count == 0;
}
}
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