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  1. #include<iostream>
  2. #include<cmath>
  3. #include<algorithm>
  4. #include<iomanip>
  5. #include<climits>
  6. #include<numeric>
  7. #include<set>
  8. #include<sstream>
  9. #include<map>
  10. #include<vector>
  11. #include<string>
  12. #include<regex>
  13.  
  14. using namespace std;
  15.  
  16. const long long MOD = (long long)(1e9 + 7);
  17.  
  18. vector<string> split(const string& haystack, const string& needle) {
  19. 	vector<string> result;
  20. 	size_t start_pos = 0;
  21. 	size_t found_pos = haystack.find(needle, start_pos);
  22. 	while (found_pos != string::npos) {
  23. 		size_t count = found_pos - start_pos;
  24. 		string token = haystack.substr(start_pos, count);
  25. 		if (!token.empty()) {
  26. 			result.push_back(token);
  27. 		}
  28. 		start_pos = found_pos + needle.length();
  29. 		found_pos = haystack.find(needle, start_pos);
  30. 	}
  31.  
  32. 	string last_token = haystack.substr(start_pos);
  33. 	if (!last_token.empty()) {
  34. 		result.push_back(last_token);
  35. 	}
  36. 	return result;
  37. }
  38.  
  39. int main() {
  40. 	int n;cin >> n;
  41. 	cin.ignore();
  42. 	for (int i = 1;i <= n;i++) {
  43. 		map<int, int> result;
  44. 		string line;getline(cin, line);
  45. 		auto parts = split(line, " + ");
  46. 		for (auto part : parts) {
  47. 			auto value = split(part, "x^");
  48. 			result[stoi(value[1])] += stoi(value[0]);
  49. 		}
  50.  
  51. 		for (auto entry = result.begin();entry != result.end();entry++) {
  52. 			cout << entry->second << "x^" << entry->first;
  53. 			if (entry != (--result.end())) {
  54. 				cout << " + ";
  55. 			}
  56. 		}
  57. 		cout << endl;
  58. 	}
  59. 	return 0;
  60. }
  61.  
  62.  
Success #stdin #stdout 0s 5316KB
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https://ideone.com/bwYhgH
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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