Prblm 语句:给定一个整数数组,回答以下形式的查询:[i, j] : 打印从 A[i] 到 A[j] 的数组元素之和
这是我使用的代码:
import java.io.*;
import java.util.*;
public class Solution {
public static void main(String[] args) {
/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
Scanner sc=new Scanner(System.in);
BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(System.out));
int n=sc.nextInt();
long arr[]=new long[n];
for(int i=0;i<n;i++)
arr[i]=sc.nextLong();
long farr[]=new long[n];
farr[0]=arr[0];
for(int i=1;i<n;i++)
farr[i]=farr[i-1]+arr[i];
int q=sc.nextInt();
while(q-->0){
int i=sc.nextInt();
int j=sc.nextInt();
if(i!=0){
//I'm converting long value to String bcoz bw can't write long value in buffer
String s=String.valueOf(farr[j]-farr[i-1]);
bw.write(s);
}
else{
String s=String.valueOf(farr[j]);
bw.write(s);
}
}
bw.flush();
bw.close();
}
}
我尝试了上面的子数组求和问题代码
需要在方法签名中添加异常
public static void main(String[] args) throws IOException