codebackup/Java Experiments/A/火车.java
2021-05-08 19:13:12 +08:00

32 lines
639 B
Java

import java.util.Scanner;
public class Main
{
public static void main(String [] args)
{
int T,n,a,b;
int max,temp;
Scanner in =new Scanner(System.in);
T=in.nextInt();
while(T!=0)
{
max=0;
temp=0;
n=in.nextInt();
while(n!=0)
{
a=in.nextInt();
b=in.nextInt();
temp=temp-a+b;
if(max<temp)
max=temp;
n--;
}
System.out.println(max);
System.out.println();
T--;
}
}
}