Compilare: user.cpp: In function ‘int main()’: user.cpp:4:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("progresii2.in","r",stdin); ^ user.cpp:5:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("progresii2.out","w",stdout); ^ user.cpp:7:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:10:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v,&n); ^ user.cpp:6:24: warning: ‘lenght’ may be used uninitialized in this function [-Wmaybe-uninitialized] int t,v,n,i,sol,x,nr,lenght; ^