Compilare: main.cpp: In function 'int main()': main.cpp:62:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (i = 0; i < vsol.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:47:9: warning: unused variable 'lin' [-Wunused-variable] 47 | int n, lin, col, i, j; | ^~~ main.cpp:47:14: warning: unused variable 'col' [-Wunused-variable] 47 | int n, lin, col, i, j; | ^~~