static int findMissingNumber(int start, int end, List<Integer> list) { while (start <= end) { if (!list.contains(start)) { return start; } start++; } return -1; }
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static int findMissingNumber(int start, int end, List<Integer> list) {
while (start <= end) {
if (!list.contains(start)) {
return start;
}
start++;
}
return -1;
}