Compilare: main.cpp: In function 'void lee(int, int, int)': main.cpp:79:15: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(ii<=n && jj<=m && ii>=1 && jj>=1) ^ main.cpp: In function 'void bfs(int)': main.cpp:112:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[k].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:163:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.out","w",stdout); ^