Compilare: user.cpp: In function ‘int main()’: user.cpp:69:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size() && !ok;++i) ^ user.cpp:49:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("padure.in","r",stdin); ^ user.cpp:50:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("padure.out","w",stdout); ^ user.cpp:51:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d",&n,&m,&pl,&pc,&cl,&cc); ^ user.cpp:54:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd",&A[i][j]); ^