Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:116:25: warning: variable 'ci' set but not used [-Wunused-but-set-variable] int ci, cj; ^~ main.cpp:116:29: warning: variable 'cj' set but not used [-Wunused-but-set-variable] int ci, cj; ^~ main.cpp: In function 'int main()': main.cpp:161:38: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << x << ' ' << y << ' ' << c - 1; ^~~ main.cpp:161:26: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << x << ' ' << y << ' ' << c - 1; ^~~