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nguyenhappy92

mảng A có lập thành một dãy dạng sóng hay không?

Nov 24th, 2015
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  1. // tim dang song cua mang
  2. // Khai bao ham thu vien neu co
  3. #include<stdio.h>
  4. #include<conio.h>
  5.  
  6. #define SIZE 50
  7. void nhap(int A[],int &n)
  8. {
  9. scanf("%d",&n);
  10. for(int i=0;i<n;i++)
  11. scanf("%d",&A[i]);
  12. }
  13. int tinh(int A[],int n)
  14. {
  15. int dem=-1;
  16. for(int i=1;i<n-1;i++)
  17. {
  18. if((A[i]<=A[i+1] && A[i-1]<=A[i]) || (A[i]>=A[i+1] && A[i-1]>=A[i]))
  19. return i;
  20. }
  21. return dem;
  22. }
  23. void main()
  24. {
  25. int A[SIZE],n;
  26. nhap(A,n);
  27. printf("%d",tinh(A,n));
  28. }
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