Compilare: main.cpp: In function 'int main()': main.cpp:41:41: warning: unused variable 'lin' [-Wunused-variable] int arie = 0, cate = 0, lin, col; ^~~ main.cpp:41:46: warning: unused variable 'col' [-Wunused-variable] int arie = 0, cate = 0, lin, col; ^~~ main.cpp: In function 'std::pair<int, int> getSol()': main.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^