Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:17:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:27:16: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] while(in>>s+1) ^ user.cpp:29:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=strlen(s+1); i++) ^ user.cpp:30:20: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(i==1&&isalpha(s[i])||(i>1&&isalpha(s[i])&&!isalpha(s[i-1]))) ^ user.cpp:46:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0; k<=v[j].size(); k++) ^ user.cpp:48:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0; k<=v[i].size(); k++) ^