我正在尝试求二维数组对角线的差值之和。
import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;
class Result
{
public static int diagonalDifference(List<List<Integer>> arr)
{
int d1=0,d2=0;
int res;
for(int i=0; i<=arr.size(); i++)
{
for(int j=0; j<=i; j++)
{
if(i==j)
{
d1 = d1+arr.get(i,j);
}
if(i==arr.size()-j-1)
{
d2 = d2+arr.get(i,j);
}
}
}
res=d1-d2;
return res;
}
}
public class Solution
{
public static void main(String[] args) throws IOException
{
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
int n = Integer.parseInt(bufferedReader.readLine().trim());
List<List<Integer>> arr = new ArrayList<>();
for (int i = 0; i < n; i++)
{
String[] arrRowTempItems = bufferedReader.readLine()
.replaceAll("\\s+$", "")
.split(" ");
List<Integer> arrRowItems = new ArrayList<>();
for (int j=0; j<n; j++)
{
int arrItem = Integer.parseInt(arrRowTempItems[j]);
arrRowItems.add(arrItem);
}
arr.add(arrRowItems);
}
int result = Result.diagonalDifference(arr);
bufferedWriter.write(String.valueOf(result));
bufferedWriter.newLine();
bufferedReader.close();
bufferedWriter.close();
}
}
Solution
.java:29: error: methodget
ininterface List<E>
cannot be applied to given types;`d1 = d1+arr.get(i,j);` ^ required: `int`
found:
int
,int
reason: actual and formal argument lists differ in length
where
E
is a type-variable:
E
extendsObject
declared ininterface List
Solution.java:33: error: method get in
interface List<E>
cannot be applied to given types;`d2 = d2+arr.get(i,j);` ^ required: int
found:
int
,int
reason: actual and formal argument lists differ in length
where
E
is a type-variable:E
extendsObject
declared ininterface List
最佳答案
你可以重写方法diagonalDifference
如下所示:
public static int diagonalDifference(List<List<Integer>> arr)
{
int d1=0,d2=0;
int res;
int size = arr.size();
for(int i=0;i<size;i++)
{
d1 += arr.get(i).get(i);
d2 += arr.get(i).get(size - i -1);
}
res=d1-d2;
return res;
}
您不需要List<List<Integer>>
因为从您的代码中您定义了一个不再修改的 int[][] 数组,因此您可以传递 int[][] array
之前定义过。
关于java - 对于对角线之和的差异,我收到以下错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60380839/