Compilare: user.cpp: In function ‘void equil(int, int)’: user.cpp:13:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[ran][buc-1].dq.size()<=mar) return; ^ user.cpp: In function ‘void add(int, int, int)’: user.cpp:39:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[ran][buc].dq.size()<loc) ^ user.cpp:46:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[ran][buc].dq.size()>mar) equil(ran,buc+1); ^ user.cpp: In function ‘int main()’: user.cpp:61:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("grid.in","r",stdin); ^ user.cpp:62:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("grid.out","w",stdout); ^ user.cpp:63:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:75:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&p1,&p2,&p3,&p4); ^