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  1. #include <vector>
  2. #include <list>
  3. #include <map>
  4. #include <set>
  5. #include <string>
  6. #include <cstring>
  7. #include <deque>
  8. #include <stack>
  9. #include <bitset>
  10. #include <algorithm>
  11. #include <functional>
  12. #include <numeric>
  13. #include <utility>
  14. #include <sstream>
  15. #include <iostream>
  16. #include <iomanip>
  17. #include <cstdio>
  18. #include <cmath>
  19. #include <cstdlib>
  20. #include <ctime>
  21.  
  22. using namespace std;
  23. long a[111100] = {};
  24. set<long> s;
  25. long n,m,l,x,y;
  26.  
  27. int main () {
  28.     cin >> n >> l >> x >> y;
  29.     for (int i = 0; i < n; i ++){
  30.         cin >> a[i];
  31.         s.insert(a[i]);
  32.     }
  33.     long ans = 0;
  34.     for (int i = 0; i < n; i ++){
  35.         if (ans % 2 == 0)
  36.             if (s.count(a[i]-x) > 0 || s.count(a[i]+x) > 0) 
  37.                 ans = ans | 1;
  38.         if ((ans & 2) == 0) { cout << a[i] + y;
  39.             if (s.count(a[i]-y) > 0 || s.count(a[i]+y) > 0) 
  40.                 ans = ans | 2;     
  41.                }
  42.         cout << a[i] + y<< " " << ans << endl;
  43.     }
  44.  
  45.     if (ans == 3) {
  46.         cout << 0;
  47.         return 0;
  48.     }
  49.     if (ans == 1) {
  50.         printf("%d\n%d",1,y);
  51.         return 0;
  52.     }
  53.     if (ans == 2) {
  54.         printf("%d\n%d",1,x);
  55.         return 0;
  56.     }
  57.     for (int i =0; i < n; i ++) {
  58.         long t = a[i] - x;
  59.         if (t > 0) {
  60.             if (s.count(t-y) > 0 || s.count(t+y) > 0) {
  61.                 printf("%d\n%d",1,t);
  62.                 return 0;
  63.             }
  64.         }
  65.  
  66.         t = a[i] + x;
  67.         if (t <= l) {
  68.             if (s.count(t-y) > 0 || s.count(t+y) > 0) {
  69.                 printf("%d\n%d",1,t);
  70.                 return 0;
  71.             }
  72.         }        
  73.     }
  74.     printf("%d\n%d %d",2,x,y);
  75. }
  76.  
Success #stdin #stdout 0s 3912KB
comments (?)
stdin
copy 
4 250 185 230
0 20 185 250
stdout
copy 
230230 1
250250 3
415 3
480 3
0
https://ideone.com/TYRD4f
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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