Compilare: main.cpp: In function 'int main()': main.cpp:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(d); ++i) ~~^~~~~~~~~~~ main.cpp:52:51: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] while (ok(x+ misc[k].first,y+ misc[k].second)) ~~~~~~~~^~~~~~