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public class MathDemo {
public static void main(String[] args) {
int sum = 0;
for(int i = 1; i <= 50; i++) {
sum += 2 * i -1;
System.out.print(sum);
sum -= 2 * i;
System.out.println(", " + sum);
}
}
}
public static void main(String[] args) {
long sum1=0,sum2=0,sum=0;
for(int i=1;i <=100;i++) {
if(i%2==0){
sum1+=i*10+3;
}
if(i%2!=0){
sum2+=i*10+3;
}
System.out.println(sum1);
System.out.println(sum2);
}
sum= sum2-sum1;
System.out.print(sum);
}