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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin >> n;
  7. 	string a,b;
  8. 	cin >> a >> b;
  9. 	int h = 0;
  10. 	map<pair<char,char>,int> pairs;
  11. 	bool sol_found = false;
  12. 	int first_idx,sec_idx;
  13. 	vector<int> sec(26,-1);
  14. 	vector<int> fir(26,-1);
  15. 	for(int i = 0 ; i < a.size() ; i++){
  16. 		if(a[i] != b[i]){
  17. 			//cout << a[i] << " "<< b[i] << " " << pairs[{b[i],a[i]}] << endl;
  18. 			if(pairs[{b[i],a[i]}]){
  19. 				sol_found = true;
  20. 				first_idx = pairs[{b[i],a[i]}];
  21. 				sec_idx = i+1;
  22. 			}
  23. 			pairs[{a[i],b[i]}] = i+1;
  24. 			h++;
  25. 			sec[b[i] - 'a'] = i+1;
  26. 			fir[a[i] - 'a'] = i+1;
  27. 		}
  28. 	}
  29. 	//cout << h <<  " " << sol_found << endl;
  30. 	if(sol_found){
  31. 		cout << h-2 << endl;
  32. 		//cout << first_idx << " " << sec_idx << endl;
  33. 		return 0;
  34. 	}
  35. 	for(int i = 0 ; i < 26 ; i++){
  36. 		//cout << fir[i] << " " << sec[i] << endl;
  37. 		if(fir[i] != -1 && sec[i] != -1){
  38. 			if(fir[i] != sec[i]){
  39. 				cout << h - 1 << endl;
  40. 				cout << fir[i] << " " << sec[i] << endl;
  41. 				return 0;
  42. 			}else{
  43. 				cout << h-1 << endl;
  44. 				cout << -1 << " " << -1 << endl;
  45. 				return 0;
  46. 			}
  47. 		}
  48. 	}
  49. 	cout << h << endl;
  50. 	cout << -1 << " " << -1 << endl;
  51. 	return 0;
  52. }
Success #stdin #stdout 0.01s 5336KB
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https://ideone.com/R5bOWJ
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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