foo.c: In function 'main':
foo.c:6:6: warning: unused variable 'x' [-Wunused-variable]
int x=0;
^
foo.c:7:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&m,&n);
^~~~~~~~~~~~~~~~~~~
foo.c:11:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&a[i+1][j+1]);
^~~~~~~~~~~~~~~~~~~~~~~~
foo.c:18:7: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
cnt++;
~~~^~
[Hydro](https://hydro.ac)提供评测服务