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- #include <stdio.h>
- #include <gmpxx.h>
- #include <iostream>
- #include <iomanip>
- #include <string>
- #include <vector>
- #include <sstream>
- std::string fixed(mpf_class x, int prec)
- {
- std::ostringstream ss;
- ss << std::fixed;
- ss << std::setprecision(prec);
- ss << x;
- std::string str = ss.str();
- return str.substr(0, str.find_last_not_of('0') + 1);
- }
- int main(int argc, char **argv)
- {
- int d = 20; //dokladnosc
- int n = 0; //ilosc liczb
- int p = 1; //okres
- mp_exp_t exp;
- if(argc > 1)
- {
- d = atoi(argv[1]);
- }
- double bits_per_digit = 3.32192809488736234789; //log2(10)
- //mpf_set_default_prec((21+d)*bits_per_digit + 1);
- //bo d dotyczy tego co po kropce, a z przodu moze byc jeszcze jakies ok. 20 cyfr dla 2^64
- //a jednak wincyj niz 20, jak w wariancji w przykladzie 4, jest jakies 40 przed kropka..
- //no i jak to oszacowac? moze po prostu od razu 100, po co sie rozdrabniac?
- mpf_set_default_prec((100+d)*bits_per_digit + 1);
- std::string sxn;
- mpf_class xn;xn = 0;
- mpf_class xn_sum; xn_sum = 0;
- mpf_class xn_2sum; xn_2sum = 0;
- std::vector<float> XXX;
- float closeInaf;
- while(std::cin >> sxn)
- {
- xn = sxn;
- xn_sum += xn;
- xn_2sum += (xn*xn);
- closeInaf = (float)xn.get_d();
- XXX.push_back(closeInaf);
- if(n!= 0 && XXX[n-p] != closeInaf)
- {
- p++;
- }
- n+=1;
- }
- mpf_class avg = xn_sum / n;
- mpf_class vari = (xn_2sum / n) - avg*avg;
- //std::cout.precision(d+1);
- std::cout.setf(std::ios_base::fixed);
- std::cout << fixed(avg, d) << std::endl;
- //std::cout << avg.get_str(exp, 10, (size_t)d) << std::endl;
- std::cout << fixed(vari, d) << std::endl;
- std::cout << p << "\n";
- return 0;
- }
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