Straight in playing cards (simple)
September 14, 2020
Question source: Likou
Problem solving
- Violent
if-else statement can be broken
class Solution {
public boolean isStraight(int[] nums) {
int king=0;
Arrays.sort(nums);
if(nums[0]==0) king++;
for(int i=1;i<5;i++){
if(nums[i]==0) king++;
else if(nums[i-1]==0) continue;
else if(nums[i-1]+1==nums[i]) continue;
else if(nums[i-1]==nums[i]) return false;
else if(nums[i]-nums[i-1]>1){
int tmp=nums[i-1];
while((king--)>0){
tmp++;
if(nums[i]-tmp==1) break;
}
if(nums[i]-tmp!=1)
return false;
}
}
return true;
}
}
- The law The law of
using straights: the largest card-the smallest card will definitely be less than 5, and this condition is true
class Solution {
public boolean isStraight(int[] nums) {
int king=0;
Arrays.sort(nums);
for(int i=0;i<4;i++){
if(nums[i]==0) king++;
else if(nums[i]==nums[i+1]) return false;
}
return nums[4]-nums[king]<5;
}
}