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Compile Error

./Main.java:1: error: class, interface, or enum expected
Scanner sc = new Scanner(System.in);
^
./Main.java:2: error: class, interface, or enum expected
		String a = sc.nextLine();
		^
./Main.java:3: error: class, interface, or enum expected
		int [] s = new int[a.length()];
		^
./Main.java:4: error: class, interface, or enum expected
		for(int i=0;i<a.length();i++){
		^
./Main.java:4: error: class, interface, or enum expected
		for(int i=0;i<a.length();i++){
		            ^
./Main.java:4: error: class, interface, or enum expected
		for(int i=0;i<a.length();i++){
		                         ^
./Main.java:6: error: class, interface, or enum expected
		}
		^
./Main.java:8: error: class, interface, or enum expected
		String str1 = "";
		^
./Main.java:9: error: class, interface, or enum expected
		for(int i=0;i<s.length;i++){
		^
./Main.java:9: error: class, interface, or enum expected
		for(int i=0;i<s.length;i++){
		            ^
./Main.java:9: error: class, interface, or enum expected
		for(int i=0;i<s.length;i++){
		                       ^
./Main.java:12: error: class, interface, or enum expected
				str1 = a.substring(0,i);
				^
./Main.java:13: error: class, interface, or enum expected
			}
			^
./Main.java:16: error: class, interface, or enum expected
		int num1 = Integer.valueOf(str1);
		^
./Main.java:17: error: class, interface, or enum expected
		int b = 0;
		^
./Main.java:18: error: class, interface, or enum expected
		if(num>num1){
		^
./Main.java:20: error: class, interface, or enum expected
		}else{
		^
./Main.java:22: error: class, interface, or enum expected
		}
		^
./Main.java:23: error: class, interface, or enum expected
		for(int i=0;i<=2;i++){
		            ^
./Main.java:23: error: class, interface, or enum expected
		for(int i=0;i<=2;i++){
		                 ^
./Main.java:24: error: class, interface, or enum expected
			for(int z=0;z<=3;z++){
			            ^
./Main.java:24: error: class, interface, or enum expected
			for(int z=0;z<=3;z++){
			                 ^
./Main.java:25: error: class, interface, or enum expected
				for(int k=0;k<=2;k++){
				            ^
./Main.java:25: error: class, interface, or enum expected
				for(int k=0;k<=2;k++){
				                 ^
./Main.java:26: error: class, interface, or enum expected
					for(int q=0;q<=2;q++){
					            ^
./Main.java:26: error: class, interface, or enum expected
					for(int q=0;q<=2;q++){
					                 ^
./Main.java:27: error: class, interface, or enum expected
						for(int m=0;m<=9;m++){
						            ^
./Main.java:27: error: class, interface, or enum expected
						for(int m=0;m<=9;m++){
						                 ^
./Main.java:30: error: class, interface, or enum expected
							}
							^
29 errors
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信息

递交者
类型
递交
比赛
2021年中北算法竞赛队招新测试
语言
Java
递交时间
2021-10-24 16:41:33
评测时间
2021-10-24 16:41:33
评测机
分数
0
总耗时
0ms
峰值内存
0 Bytes