jakaria_hossain

codeforce - The Doors

Mar 31st, 2019
82
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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. #define fastread()(ios_base:: sync_with_stdio(false),cin.tie(NULL));
  5. int main()
  6. {
  7. fastread();
  8. int n;
  9. cin>>n;
  10. int ara[n+1],z=0,o=0,zc=0,oc=0,k;
  11. for(int i=0; i<n; i++)
  12. {
  13. cin>>ara[i];
  14. if(ara[i]==0)
  15. z++;
  16. else
  17. o++;
  18. }
  19. for(int i=0; i<n; i++)
  20. {
  21. if(ara[i]==0)
  22. {
  23. zc++;
  24. if(zc==z)
  25. {
  26. k=i;
  27. break;
  28. }
  29. }
  30. else
  31. {
  32. oc++;
  33. if(oc==o)
  34. {
  35. k=i;
  36. break;
  37. }
  38. }
  39. }
  40. printf("%d\n",k+1);
  41. }
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