Compilare: user.cpp: In function ‘int test(int)’: user.cpp:57:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<m[nod.node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:100:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp:118:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=1; ^ user.cpp:97:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lanterna.in","r",stdin); ^ user.cpp:98:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lanterna.out","w",stdout); ^