Compilare: user.cpp: In function ‘int update(int, int)’: user.cpp:18:23: warning: no return statement in function returning non-void [-Wreturn-type] aib[i]=max(aib[i],nr);} ^ user.cpp: In function ‘int main()’: user.cpp:25:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heavymetal.in","r",stdin); ^ user.cpp:26:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heavymetal.out","w",stdout); ^ user.cpp:28:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:30:141: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&f[i].x,&f[i].y),f[i].l=f[i].y-f[i].x,v[++num].nr=f[i].x,v[num].poz=i,v[num].tip=0,v[++num].nr=f[i].y,v[num].poz=i,v[num].tip=1; ^