Compilare: user.cpp: In function ‘void myfill(int, int)’: user.cpp:37:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (xn >= 1 && xn <= n && yn >= 1 && yn <= m) ^ user.cpp: In function ‘int getFather(int)’: user.cpp:56:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void solve()’: user.cpp:72:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < colors [0].size (); ++ i) ^ user.cpp:83:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < colors [c].size (); ++ i) ^ user.cpp:89:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 1; j < v.size (); ++ j) { ^