Compilare: user.cpp: In function ‘void Solve(seg*, int, int)’: user.cpp:57:25: warning: unused variable ‘mint’ [-Wunused-variable] int i,j,t,minn,maxx,mint,o,nr,st,dr,mid,f,x,y; ^ user.cpp: In function ‘void Read(int&)’: user.cpp:27:53: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz==DIM) fread(buff,1,DIM,stdin),poz=0; ^ user.cpp:32:53: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz==DIM) fread(buff,1,DIM,stdin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:121:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rays.in","r",stdin); ^ user.cpp:122:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rays.out","w",stdout); ^ user.cpp:126:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp: In function ‘void Solve(seg*, int, int)’: user.cpp:84:24: warning: ‘f’ may be used uninitialized in this function [-Wmaybe-uninitialized] gr[i].first = f; ^