Compilare: main.cpp: In function 'long long int qr(long long int)': main.cpp:40:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | while(k+1 < pante.size() and pante[k+1]*x + fzero[k+1] < pante[k]*x + fzero[k]) | ~~~~^~~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:45:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 45 | main() | ^~~~