Compilare: main.cpp: In function 'int f(int, context&)': main.cpp:204:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 204 | for (int j = 0; j < _.number.primes.size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:208:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 208 | for (int pwr = 0; pwr <= _.number.coef.size(); pwr++) | ~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:211:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 211 | if (pwr < _.number.coef.size()) | ~~~~^~~~~~~~~~~~~~~~~~~~~~