foo.c: In function 'main':
foo.c:17:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   17 |  scanf("%d",&n1);
      |  ^~~~~~~~~~~~~~~
foo.c:18:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   18 |   scanf("%d",&n2);
      |   ^~~~~~~~~~~~~~~
foo.c:20:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   20 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:22:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   22 |   scanf("%d",&b[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c: In function 'maxs':
foo.c:12:10: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |  return j+1;
      |         ~^~
foo.c:7:5: warning: 'min' may be used uninitialized in this function [-Wmaybe-uninitialized]
    7 |   if(min>a[i])
      |     ^
foo.c: In function 'main':
foo.c:12:10: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |  return j+1;
      |         ~^~
foo.c:4:8: note: 'j' was declared here
    4 |  int i,j,min;
      |        ^
foo.c:7:5: warning: 'min' may be used uninitialized in this function [-Wmaybe-uninitialized]
    7 |   if(min>a[i])
      |     ^
foo.c:4:10: note: 'min' was declared here
    4 |  int i,j,min;
      |          ^~~
foo.c:12:10: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |  return j+1;
      |         ~^~
foo.c:4:8: note: 'j' was declared here
    4 |  int i,j,min;
      |        ^
foo.c:7:5: warning: 'min' may be used uninitialized in this function [-Wmaybe-uninitialized]
    7 |   if(min>a[i])
      |     ^
foo.c:4:10: note: 'min' was declared here
    4 |  int i,j,min;
      |          ^~~

[Hydro](https://hydro.ac)提供评测服务