Compilare: user.cpp: In function ‘int verif(int, int)’: user.cpp:16:19: warning: unused variable ‘ctx’ [-Wunused-variable] int rez=0,i,j,ctx,cty; ^~~ user.cpp:16:23: warning: unused variable ‘cty’ [-Wunused-variable] int rez=0,i,j,ctx,cty; ^~~ user.cpp: In function ‘int main()’: user.cpp:41:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("identice.in","r",stdin); ^ user.cpp:42:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("identice.out","w",stdout); ^ user.cpp:43:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&q,&n,&k); ^ user.cpp:46:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",a[i]+1); ^