Compilare: main.cpp: In function 'int f(int, context&)': main.cpp:203:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 203 | for (int j = 0; j < _.number.primes.size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:207:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 207 | for (int pwr = 0; pwr <= _.number.coef.size(); pwr++) | ~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:210:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 210 | if (pwr < _.number.coef.size()) | ~~~~^~~~~~~~~~~~~~~~~~~~~~