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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.     // 처음엔 숭돌이 답 위주로
  17.     for (int i = 0; i < N; i++) {
  18.         ans[i] = SS[i];
  19.     }
  20.  
  21.     auto recompute = [&]() {
  22.         scoreS = scoreK = scoreH = 0;
  23.         for (int i = 0; i < N; i++) {
  24.             if (ans[i] == SS[i]) scoreS++;
  25.             if (ans[i] == SK[i]) scoreK++;
  26.             if (ans[i] == SH[i]) scoreH++;
  27.         }
  28.     };
  29.  
  30.     recompute();
  31.  
  32.     // 안 되면 조정
  33.     for (int i = 0; i < N; i++) {
  34.         if (scoreS > scoreK && scoreK > scoreH) break;
  35.         // 이 자리를 바꿔서 조정 시도
  36.         char best = ans[i];
  37.         int bestS = scoreS, bestK = scoreK, bestH = scoreH;
  38.         for (char c : {SS[i], SK[i], SH[i], 'a'}) {
  39.             if (c == ans[i]) continue;
  40.             int oldS = (ans[i] == SS[i]);
  41.             int oldK = (ans[i] == SK[i]);
  42.             int oldH = (ans[i] == SH[i]);
  43.             int newS = scoreS - oldS + (c == SS[i]);
  44.             int newK = scoreK - oldK + (c == SK[i]);
  45.             int newH = scoreH - oldH + (c == SH[i]);
  46.             if (newS > newK && newK > newH) {
  47.                 best = c;
  48.                 bestS = newS; bestK = newK; bestH = newH;
  49.                 break;
  50.             }
  51.         }
  52.         if (best != ans[i]) {
  53.             ans[i] = best;
  54.             scoreS = bestS; scoreK = bestK; scoreH = bestH;
  55.         }
  56.     }
  57.  
  58.     if (scoreS > scoreK && scoreK > scoreH) {
  59.         cout << ans << "\n";
  60.     } else {
  61.         cout << -1 << "\n";
  62.     }
  63. }
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin 
5
abcde
efgtb
abgte
stdout 
-1
https://ideone.com/jt7ieS
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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