foo.c: In function 'main':
foo.c:4:12: warning: unused variable 'j' [-Wunused-variable]
  int N,n,i,j,m,k,l,sum,minn=99999999;
            ^
foo.c:5:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&N);
  ^~~~~~~~~~~~~~
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ^~~~~~~~~~~~~~~~~~~
foo.c:9:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&k,&l);
   ^~~~~~~~~~~~~~~~~~~

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