View Compilation Error

0_0_10182888_4\Main.java:7: 软件包 acm.utils 不存在
import acm.utils.MinDistancePointPairCaculator;
                ^
0_0_10182888_4\Main.java:22: 找不到符号
符号： 类 MinDistancePointPairCaculator
位置： 类 acm.hdu.p1007.Main
			MinDistancePointPairCaculator caculator = new MinDistancePointPairCaculator(points);
			^
0_0_10182888_4\Main.java:22: 找不到符号
符号： 类 MinDistancePointPairCaculator
位置： 类 acm.hdu.p1007.Main
			MinDistancePointPairCaculator caculator = new MinDistancePointPairCaculator(points);
			                                              ^
3 错误