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Jan 23rd, 2018
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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. /*long ex9(int n )
  6. { int a1=1,a2=1,a3,i,j=0;
  7. for(i=3;i<=n;i++)
  8. { a3=a1+a2;
  9. a1=a2;
  10. a2=a3;
  11. }
  12. return a3;
  13. }
  14. int main()
  15. { int n;
  16. cin>>n;
  17. cout<<ex9(n);
  18. return 0;
  19. }
  20.  
  21. long ex10(int n)
  22. {
  23. int i,d=1;
  24. for(i=n;i>=2;i--)
  25. { d=1;
  26. for(int j=2;j<=i/2;j++)
  27. if(i%j==0)
  28. d++;
  29. if(d==1)
  30. return i;
  31. }
  32.  
  33. }
  34. int main()
  35. {
  36. int n;
  37. cin>>n;
  38. cout<<ex10(n);
  39.  
  40. }
  41. long ex11(int n)
  42. {
  43. int o=0,cn=n;
  44. while(cn>0)
  45. {
  46. o=o*10+cn%10;
  47. cn=cn/10;
  48. }
  49. if(o==n)
  50. return 0;
  51. if(o!=n)
  52. return 1;
  53. }
  54.  
  55. int main()
  56. {
  57. int n;
  58. cin>>n;
  59. if(ex11(n)==0)
  60. cout<<"DA!";
  61. if(ex11(n)==1)
  62. cout<<"NU!";
  63. return 0;
  64. }*/
  65. long ex12(int n)
  66. {
  67. int a[n],d1=1,d2=1;
  68. for(int 1=0;i<n;i++)
  69. {
  70. cin>>x;
  71. a[i]=x;
  72. }
  73. for(int j=0;j<n;j++,nrv=0)
  74. {
  75. for(int g=1;g<=a[j]/2;g++)
  76. if(a[j]%g==0)
  77. d1++;
  78. for(int h=1;h<=a[j+1]/2;h++)
  79. if(a[h+1]%h==0)
  80. d2++;
  81. if(d1==1&&d2==1)
  82. nrv++;
  83. }
  84. return nrv;
  85. }
  86. int main()
  87. { int n;
  88. cin>>n;
  89. cout<<ex12(n);
  90.  
  91. }
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