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:569:24: required from here main.cpp:218:11: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 218 | if (r < 2*a) { | ~~^~~~~ main.cpp:223:13: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 223 | if (r > a) { | ~~^~~ main.cpp:224:27: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 224 | for (int i = 1; i < r-a; ++i) { | ~~^~~~~ main.cpp:227:29: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 227 | for (int i = r-a; i < a; ++i) { | ~~^~~ main.cpp:231:27: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 231 | for (int i = 1; i < a; ++i) { | ~~^~~ main.cpp:237:25: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 237 | for (int i = 1; i < a; ++i) { | ~~^~~ main.cpp:240:25: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 240 | for (int i = 1; i < a; ++i) { | ~~^~~ main.cpp:245:23: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 245 | for (int i = 0; i < a; ++i) | ~~^~~