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(void)kuaisupaixu:(NSMutableArray *)arr low:(NSInteger)left High:(NSInteger)right {
if(left < right) {
NSInteger i = left;
NSInteger j = right;
NSInteger key = [arr[left] integerValue];while (i < j) { while (i < j && key <= [arr[j] integerValue]) { j--; } arr[i] = arr[j]; while (i < j && key >= [arr[i] integerValue]) { i++; } arr[j] = arr[i]; } arr[i] = [NSNumber numberWithInteger:key]; [self kuaisupaixu:arr low:left High:i - 1]; [self kuaisupaixu:arr low:i + 1 High:right];}
NSLog(@"%@",arr);
}
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