TopCoder - "TCHS SRM 1" 答案 及 代码

"TCHS SRM 1" 答案 及 代码

 

由于题目涉密以及英文, 不方便一一列出, 希望能坚持下去;

TopCoder具体网址:http://community.topcoder.com/

 

250-points: 雷达识别均值问题:

Code:

#include <string> #include <vector> #include <cstddef>  using namespace std;  class SpeedRadar { public:     double averageSpeed (int minLimit, int maxLimit, std::vector <int> readings); };  double SpeedRadar::averageSpeed (int minLimit, int maxLimit, std::vector <int> readings){ 	size_t cnt = readings.size(); 	size_t lmtCnt = 0.1*cnt; 	double total(0.0); 	size_t infCnt(0); 	for (const auto& i : readings){ 		if(i<minLimit || i>maxLimit){ 			infCnt++; 			if(infCnt > lmtCnt){ 				total = 0.0; 				break; 			} 		}else{ 			total += i; 		} 	} 	return total/(cnt-infCnt); }

500-points: 语言的字母规律:

Code:

#include <string> #include <vector> #include <array> #include <numeric> #include <cmath> #include <limits> #include <cstddef>  using namespace std;  class SymbolFrequency { public: 	double language(vector <string> frequencies, vector <string> text); };  double SymbolFrequency::language(vector <string> frequencies, vector <string> text){ 	int asc(0); //ascii 	double cnt(0.0); //the count of alphabets 	double sum(0.0); //each language difference 	double result = std::numeric_limits<double>::max(); //result 	std::array<double, 26> alpText = {0}; 	for(const auto& str : text){ 		for(const auto& c : str){ 			asc = static_cast<int>(c); 			++alpText[asc-97]; 		} 	} 	cnt = std::accumulate(alpText.begin(), alpText.end(), 0); 	std::array<double, 26> alpFreq = {0}; 	for(const auto& fre : frequencies){ 		for(auto i=fre.cbegin(); i!=fre.cend(); i+=3){ 			asc = static_cast<int>(*i); 			std::string fig = std::string(i+1, i+3); 			alpFreq[asc-97] = std::stod(fig)*cnt/100.0; 		} 		for(size_t i=0; i<26; ++i){ 			sum += std::pow(std::abs(alpFreq[i] - alpText[i]), 2.0); 		} 		result = (sum < result) ? sum : result; 		sum = 0; //reset 	} 	return result; }