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  1.  
  2.     // Complexity    O(log(n)+log(m))
  3.  
  4. #include<bits/stdc++.h>
  5. using namespace std;
  6. #define f(i,x,y) for(int i = (x);i < (y);++i)
  7. #define F(i,x,y) for(int i = (x);i > (y);--i)
  8. int max(int a,int b){return (a > b?a:b);}
  9. int min(int a,int b){return (a < b?a:b);}
  10. int mod(int a){return (a > 0?a:((-1)*(a)));}
  11. #define INF 1000000
  12.  
  13.  
  14.  
  15. int func(int *arr1,int *arr2,int sz1,int sz2,int k)
  16. {
  17.   if((k <= (sz1+sz2))&&(k > 0))
  18.   {
  19.     int s = 1,e,i,j;
  20.     if(k > sz1)e = sz1+1;
  21.     else e = k;
  22.     while((e-s)>1)
  23.     {
  24.       i = (e+s)/2;
  25.       j = ((k-1)-(i-1)); 
  26.       j++;
  27.       if(j > (sz2+1)){s = i;}
  28.       else if((arr1[i] >= arr2[j-1])&&(arr1[i] <= arr2[j]))return arr1[i];
  29.       else if((arr2[j] >= arr1[i-1])&&(arr2[j] <= arr1[i]))return arr2[j];
  30.       else if(arr1[i] < arr2[j-1]){s = i;}
  31.       else if(arr1[i] > arr2[j]){e = i;}
  32.       else {;}
  33.     }
  34.     i = e,j = ((k-1)-(i-1));j++;
  35.     if((arr1[i] >= arr2[j-1])&&(arr1[i] <= arr2[j]))return arr1[i];
  36.     else if((arr2[j] >= arr1[i-1])&&(arr2[j] <= arr1[i]))return arr2[j];
  37.     else
  38.     {
  39.       i = s,j = ((k-1)-(i-1));j++;
  40.       if((arr1[i] >= arr2[j-1])&&(arr1[i] <= arr2[j]))return arr1[i];
  41.       else return arr2[j];
  42.     }
  43.   }
  44.   else
  45.   {
  46.     cout << "Data Invalid" << endl;
  47.     return -INF;
  48.   }
  49. }
  50.  
  51.  
  52.  
  53.  
  54. int main()
  55. {
  56.   int n,m,k;
  57.   cin >> n >> m >> k;
  58.   int arr1[n+2];
  59.   int arr2[m+2];
  60.   f(i,1,n+1)
  61.     cin >> arr1[i];
  62.     f(i,1,m+1)
  63.     cin >> arr2[i];
  64.   arr1[0] = -INF;
  65.   arr2[0] = -INF;
  66.   arr1[n+1] = +INF;
  67.   arr2[m+1] = +INF; 
  68.   int val = func(arr1,arr2,n,m,k);
  69.   if(val != -INF)cout << val << endl;   
  70.   return 0;
  71. }
  72.  
Success #stdin #stdout 0s 16064KB
comments (?)
stdin 
5
5
4
1 5 8 9 10
2 3 4 6 7
stdout 
4
https://ideone.com/xVST32
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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