Saleh127

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May 10th, 2020
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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. int main()
  5. {
  6. ll a[100005],c,d,e,f,i,j=0,k,l;
  7. cin>>c;
  8. for(i=0; i<c; i++)
  9. {
  10. cin>>a[i];
  11. }
  12. sort(a,a+c);
  13. for(i=1; i<c-1; i++)
  14. {
  15. if(a[i-1]+a[i]>a[i+1])
  16. j=1;
  17. }
  18. if(j) printf("YES\n");
  19. else printf("NO\n");
  20. return 0;
  21. }
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