解題思路
貪心加枚舉
代碼
class Solution {
public String maximumTime(String time) {
char[] chars = time.toCharArray();
for (int i=chars.length-1;i>=3;i--){
if (chars[i]=='?'){
if (i==chars.length-1){
chars[i]='9';
}
else if (i==chars.length-2){
chars[i]='5';
}
}
}
if (chars[0]=='?' && chars[1]=='?'){
chars[0]='2';
chars[1]='3';
return new String(chars);
}
if (chars[0]=='?'){
if (chars[1]>'3'){
chars[0]='1';
}else {
chars[0]='2';
}
return new String(chars);
}
if (chars[1]=='?') {
if (chars[0]=='1'||chars[0]=='0'){
chars[1]='9';
}else {
chars[1]='3';
}
}
return new String(chars);
}
}