Compilare: main.cpp: In function 'void backtrack(int)': main.cpp:44:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | if(pas==ctcsol.size()+1) | ~~~^~~~~~~~~~~~~~~~~ main.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for(int i=0;i<ctcsol.size()&&ok;i++) | ~^~~~~~~~~~~~~~