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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. const int MaxN=1e5;
  5. const int MaxA=1e9;
  6. int N, M;
  7. int A[MaxN];
  8. int B[MaxN];
  9.  
  10. int main(){
  11. 	cin>>N>>M;
  12. 	for(int n=0; n<N; n+=1)
  13. 		cin>>A[n];
  14. 	for(int m=0; m<M; m+=1)
  15. 		cin>>B[m];
  16. 	sort(A,A+N);
  17. 	sort(B,B+M);
  18. 	long W=0;
  19. 	for(int m=0, n=0; n<N; n+=1){
  20. 		while(m<M && B[m]<A[n])
  21. 			m+=1;
  22. 		W+=m;
  23. 	}
  24. 	long L=0;
  25. 	for(int n=0, m=0; m<M; m+=1){
  26. 		while(n<N && A[n]<B[m])
  27. 			n+=1;
  28. 		L+=n;
  29. 	}
  30.  
  31. 	int l=M, y=0;
  32. 	for(int w=0, n=0; n<N; n+=1){
  33. 		while(w<M && B[w] <A[n])
  34. 			w+=1;
  35. 		while(y<M && B[y]<=A[n]){
  36. 			y+=1;
  37. 			l-=1;
  38. 		}
  39. 		if( w>=l && w+W>l+L ){
  40. 			cout<<A[n];
  41. 			return 0;
  42. 		}
  43. 	}
  44. 	cout<<-1;
  45. }
Success #stdin #stdout 0.01s 5300KB
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https://ideone.com/yp1Usw
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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