Compilare: main.cpp: In function 'int main()': main.cpp:53:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for(int cntr=pos[i]; cntr<=v[i].size()-1; cntr++) | ~~~~^~~~~~~~~~~~~~~ main.cpp:75:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 75 | if(ans.size()<m) | ~~~~~~~~~~^~