Compilare: main.cpp: In function 'void fft(std::vector<std::complex<double> >&, bool)': main.cpp:22:21: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 22 | for (int i = 0; i < n/2; i++) { | ~~^~~~~ main.cpp:33:21: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 33 | for (int i = 0; i < n/2; i++) { | ~~^~~~~ main.cpp: In function 'std::vector<int> multiplyPolynomials(std::vector<int>, std::vector<int>)': main.cpp:53:21: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 53 | for (int i = 0; i < n; i++) ca[i] *= cb[i]; | ~~^~~ main.cpp:57:21: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 57 | for (int i = 0; i < n; i++) r[i] = (int)round(ca[i].real()); | ~~^~~