Compilare: main.cpp: In function 'void precalc_fact()': main.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i=2;i<=digit_init.size();i++) { | ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:39:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i=0;i<digit_init.size();i++) { | ~^~~~~~~~~~~~~~~~~~