Compilare: user.cpp: In function ‘int main()’: user.cpp:185:23: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] int n,m,i,x,y,sol,k; ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:52:27: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin); ^ user.cpp:59:27: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:186:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbvalmax.in","r",stdin); ^