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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. void fileIO() {
  6. #ifndef ONLINE_JUDGE
  7.     freopen("input.txt", "r", stdin);
  8.     freopen("output.txt", "w", stdout);
  9. #endif
  10.  
  11. #ifdef ONLINE_JUDGE
  12. #endif
  13. }
  14.  
  15. int TC;
  16.  
  17. void get_shit_done() {
  18.     int n, k;
  19.     cin >> n >> k;
  20.  
  21.     if (not k) {
  22.         for (int i = 0; i < n; ++i) {
  23.             cout << "ABC";
  24.         }
  25.         return;
  26.     }
  27.  
  28.     if (k > 3 * n - 4) {
  29.         cout << -1;
  30.         return;
  31.     }
  32.  
  33.     while (k <= 3 * n - 7) {
  34.         cout << "ABC";
  35.         --n;
  36.     }
  37.  
  38.     if (k == 3 * n - 4) {
  39.         for (int i = 0; i < n; ++i) {
  40.             cout << "AB";
  41.         }
  42.         for (int i = 0; i < n; ++i) {
  43.             cout << "C";
  44.         }
  45.     } else if (k == 3 * n - 5) {
  46.         for (int i = 0; i < n - 1; ++i) {
  47.             cout << "AB";
  48.         }
  49.         cout << "A";
  50.         for (int i = 0; i < n; ++i) {
  51.             cout << "C";
  52.         }
  53.         cout << "B";
  54.     } else {
  55.         for (int i = 0; i < n - 1; ++i) {
  56.             cout << "AB";
  57.         }
  58.         for (int i = 0; i < n; ++i) {
  59.             cout << "C";
  60.         }
  61.         cout << "AB";
  62.     }
  63. }
  64.  
  65. signed main() {
  66.     fileIO();
  67.     cin.tie(nullptr);
  68.     cout.tie(nullptr);
  69.     ios::sync_with_stdio(false);
  70.  
  71.     int T = 1;
  72.     for (TC = 1; TC <= T; ++TC) {
  73.         get_shit_done();
  74.     }
  75.  
  76.     return 0;
  77. }
Success #stdin #stdout 0s 5284KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/vef6Qq
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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