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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define ms(s,n) memset(s,n,sizeof(s))
  5. #define all(a) a.begin(),a.end()
  6. #define present(t, x) (t.find(x) != t.end())
  7. #define sz(a) int((a).size())
  8. #define FOR(i, a, b) for (int i = (a); i < (b); ++i)
  9. #define FORd(i, a, b) for (int i = (a) - 1; i >= (b); --i)
  10. #define pb push_back
  11. #define pf push_front
  12. #define fi first
  13. #define se second
  14. #define mp make_pair
  15.  
  16. typedef long long ll;
  17. typedef unsigned long long ull;
  18. typedef long double ld;
  19. typedef pair<int,int> pi;
  20. typedef vector<int> vi;
  21. typedef vector<pi> vii;
  22.  
  23. const int MOD = (int) 1e9+7;
  24. const int INF = (int) 1e9+1;
  25. inline ll gcd(ll a,ll b){ll r;while(b){r=a%b;a=b;b=r;}return a;}
  26. inline ll lcm(ll a,ll b){return a/gcd(a,b)*b;}
  27.  
  28.  
  29. void FileIO(){
  30. 	freopen("input.txt","r", stdin);
  31. 	freopen("output.txt","w",stdout);
  32. }
  33.  
  34. int main(){
  35. 	//FileIO();
  36. 	ios::sync_with_stdio(false);
  37. 	cin.tie(nullptr);
  38. 	int n,m;
  39. 	cin>>n;
  40. 	int a[n];
  41. 	FOR(i,0,n) cin>>a[i];
  42. 	cin>>m;
  43. 	int b[m];
  44. 	FOR(i,0,m) cin>>b[i];
  45. 	sort(a,a+n);
  46. 	sort(b,b+m);
  47. 	int i=0,j=0;
  48. 	int ans=0;
  49. 	while(i<n && j<m){
  50. 		if(abs(a[i]-b[j])<=1){
  51. 			++ans;
  52. 			++i;++j;
  53. 		}
  54. 		else if(a[i]<b[j]) ++i;
  55. 		else ++j;
  56. 	}
  57. 	cout<<ans<<"\n";
  58. }
Success #stdin #stdout 4.94s 796128KB
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https://ideone.com/AlZypL
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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