Compilare: main.cpp: In function 'std::vector<int> mull(const std::vector<int>&, const std::vector<int>&, const FFT_mod&)': main.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int i = 0; i < left.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:309:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 309 | for(int i=0;i<rez.size();i++) | ~^~~~~~~~~~~