Compilare: user.cpp: In function ‘int main()’: user.cpp:10:13: warning: unused variable ‘nr’ [-Wunused-variable] int n,k,nr=0,st=0,dr=0,mij,sol; ^ user.cpp:8:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grupuri.in","r",stdin); ^ user.cpp:9:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grupuri.out","w",stdout); ^ user.cpp:33:14: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<sol; ^