Compilare: user.cpp: In function ‘int main()’: user.cpp:19:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 0; i < h; i++) ^ user.cpp:20:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned j = 0; j < w; j++) ^ user.cpp:22:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 0; i < k; i++) ^ user.cpp:26:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned r = 0; r < h; r++) ^ user.cpp:28:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned j = 0; j < w; j++) ^ user.cpp:30:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(tabs(o-1-j)+tabs(s-1-r) <= c) ^ user.cpp:38:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 0; i < g; i++) ^