Compilare: main.cpp: In function 'void dfs(int)': main.cpp:3:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i,a,b) for(int i=(a);i<(b);i++) ^ main.cpp:54:2: note: in expansion of macro 'FOR' FOR(i,0,G[x].size()) ^~~ main.cpp: In function 'void solve()': main.cpp:3:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i,a,b) for(int i=(a);i<(b);i++) ^ main.cpp:70:1: note: in expansion of macro 'FOR' FOR(i,0,sz(ans)) ^~~ main.cpp: In member function 'char Parser::getChar()': main.cpp:15:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] {fread(str,sizeof(char),SIZE,fin); ^