/in/foo.c: In function 'main':
/in/foo.c:18:4: warning: 'gets' is deprecated [-Wdeprecated-declarations]
gets(y[k][i]);
^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
extern char *gets (char *__s) __wur __attribute_deprecated__;
^~~~
/in/foo.c:44:6: warning: unused variable 'b' [-Wunused-variable]
int b[400]={0},dq=0,a=m*n;
^
/in/foo.c:13:13: warning: unused variable 'j0' [-Wunused-variable]
int i,j,i0,j0,k;
^~
/in/foo.c:13:10: warning: unused variable 'i0' [-Wunused-variable]
int i,j,i0,j0,k;
^~
/tmp/ccpj6bbO.o: In function `main':
foo.c:(.text.startup+0x74): warning: the `gets' function is dangerous and should not be used.