Compilare: main.cpp: In instantiation of 'int algebra::poly<T>::inv(size_t, int) const [with T = algebra::modular<20173333>; size_t = long unsigned int]': main.cpp:574:24: required from here main.cpp:217:11: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 217 | if (r < 2*a) { | ~~^~~~~ main.cpp:242:25: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 242 | for (int i = 1; i < a; ++i) { | ~~^~~ main.cpp:245:25: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 245 | for (int i = 1; i < a; ++i) { | ~~^~~ main.cpp:250:23: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 250 | for (int i = 0; i < a; ++i) | ~~^~~