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  1. import java.util.*;
  2.  
  3. class Main
  4. {
  5. public static void main (String[] args) throws java.lang.Exception
  6. {
  7. Scanner scan = new Scanner(System.in);
  8. double sum_1=0, sum_2=0;
  9. int n = scan.nextInt();
  10. int m = scan.nextInt();
  11.  
  12. for(int k=1; k<=n; k++){
  13. for(int l=1; l<=m; l++) sum_2+=(k-l)*(k-l);
  14. sum_1+=k*k*k*sum_2;
  15. sum_2-=sum_2;
  16. }
  17.  
  18. System.out.print(sum_1);
  19. }
  20. }
Success #stdin #stdout 0.12s 29540KB
stdin
10	15
stdout
983455.0