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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     ios::sync_with_stdio(false);
  6.     cin.tie(nullptr);
  7.  
  8.     int N;
  9.     cin >> N;
  10.     string SS, SK, SH;
  11.     cin >> SS >> SK >> SH;
  12.  
  13.     string ans(N, 'a');
  14.     int scoreS = 0, scoreK = 0, scoreH = 0;
  15.  
  16.     // 1차: 숭돌이 답 위주로 채움
  17.     for (int i = 0; i < N; i++) {
  18.         if (SS[i] == SK[i] && SK[i] == SH[i]) {
  19.             // 모두 같으면 틀리게
  20.             char c = 'a';
  21.             if (c == SS[i]) c = 'b';
  22.             ans[i] = c;
  23.         } else {
  24.             ans[i] = SS[i];
  25.         }
  26.     }
  27.  
  28.     // 점수 계산
  29.     for (int i = 0; i < N; i++) {
  30.         if (ans[i] == SS[i]) scoreS++;
  31.         if (ans[i] == SK[i]) scoreK++;
  32.         if (ans[i] == SH[i]) scoreH++;
  33.     }
  34.  
  35.     // 조건 만족 못 하면 고쳐야 함
  36.     if (!(scoreS > scoreK && scoreK > scoreH)) {
  37.         bool fixed = false;
  38.         for (int i = 0; i < N && !fixed; i++) {
  39.             // 다른 글자로 바꿔서 조정 시도
  40.             int oldS = (ans[i] == SS[i]);
  41.             int oldK = (ans[i] == SK[i]);
  42.             int oldH = (ans[i] == SH[i]);
  43.  
  44.             for (char c = 'a'; c <= 'z'; c++) {
  45.                 if (c == ans[i]) continue;
  46.                 int nS = (c == SS[i]);
  47.                 int nK = (c == SK[i]);
  48.                 int nH = (c == SH[i]);
  49.                 int newS = scoreS - oldS + nS;
  50.                 int newK = scoreK - oldK + nK;
  51.                 int newH = scoreH - oldH + nH;
  52.                 if (newS > newK && newK > newH) {
  53.                     ans[i] = c;
  54.                     scoreS = newS;
  55.                     scoreK = newK;
  56.                     scoreH = newH;
  57.                     fixed = true;
  58.                     break;
  59.                 }
  60.             }
  61.         }
  62.     }
  63.  
  64.     if (scoreS > scoreK && scoreK > scoreH) {
  65.         cout << ans << "\n";
  66.     } else {
  67.         cout << -1 << "\n";
  68.     }
  69. }
Success #stdin #stdout 0s 5324KB
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stdin
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5
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stdout
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-1
https://ideone.com/5muzS5
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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