Compilare: user.cpp: In function ‘void solve2()’: user.cpp:83:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((v[i].size()+v[top].size())==edges){ ^ user.cpp: In function ‘void read()’: user.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&grad); ^ user.cpp:18:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp: In function ‘int main()’: user.cpp:92:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("incurcatura.in","r",stdin); ^ user.cpp:93:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("incurcatura.out","w",stdout); ^ user.cpp:95:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&p,&n); ^