Compilare: main.cpp: In function 'int main()': main.cpp:43:28: 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] 43 | for(int i=0;i*k+k-1<sol.size();i++) | ~~~~~~~^~~~~~~~~~~