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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int x[2001][2001];
  6.  
  7. int main() {
  8.     int n;
  9.     cin >> n;
  10.     int pos;
  11.     bool f = true;
  12.     int x1 = 1001, y1 = 1001;
  13.     for(int i = 0; i< n && f; i++) {
  14.         cin >> pos;
  15.         if(x[x1][y1] == 1) { 
  16.             cout << i;
  17.             f = false;
  18.         }
  19.         else x[x1][y1] = 1;
  20.          switch (pos) {
  21.             case 1: x1--; y1++; break;
  22.             case 3: x1++;
  23.             case 2: y1++; break;
  24.             case 4: x1++; break;
  25.             case 5: x1++;
  26.             case 6: y1--; break;
  27.             case 7: y1--; 
  28.             case 8: x1--;
  29.         }
  30.     }
  31.     if (f) cout << "Ok" << endl << abs(x1-1001) + abs(y1-1001);
  32.     return 0;
  33. }
Success #stdin #stdout 0s 30872KB
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https://ideone.com/2d2B6v
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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