static int findMissingNumber(int start, int end, List<Integer> list) {
Integer[] it = list.toArray(new Integer[10]);
Arrays.sort(it);
for(int i=start;i<end;i++) {
if(i!=it[i-10]) {
return i;
}
}return 20;
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static int findMissingNumber(int start, int end, List<Integer> list) {
Integer[] it = list.toArray(new Integer[10]);
Arrays.sort(it);
for(int i=start;i<end;i++) {
if(i!=it[i-10]) {
return i;
}
}return 20;
}