foo.c: In function 'main':
foo.c:6:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&m,&n);
   ^~~~~~~~~~~~~~~~~~~
foo.c:10:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&nums[i][j]);
     ^~~~~~~~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务