Compilare: main.cpp: In function 'int main()': main.cpp:53:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for(z = 0; z < adiacent.size(); z++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:57:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | if(z == adiacent.size()){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp:81:15: warning: 'color' may be used uninitialized [-Wmaybe-uninitialized] 81 | printf("%d %c\n", sol, color); | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:45:10: note: 'color' was declared here 45 | char color; | ^~~~~