foo.cc: In function ‘int main()’:
foo.cc:13:13: warning: ‘cha’ may be used uninitialized [-Wmaybe-uninitialized]
   13 |         int max=cha[0][0];
      |             ^~~
foo.cc:7:23: note: ‘cha’ declared here
    7 |         int a[100050],cha[1000][1000];
      |                       ^~~
foo.cc:13:13: warning: ‘cha’ may be used uninitialized [-Wmaybe-uninitialized]
   13 |         int max=cha[0][0];
      |             ^~~
foo.cc:7:23: note: ‘cha’ declared here
    7 |         int a[100050],cha[1000][1000];
      |                       ^~~
foo.cc:13:13: warning: ‘cha’ may be used uninitialized [-Wmaybe-uninitialized]
   13 |         int max=cha[0][0];
      |             ^~~
foo.cc:7:23: note: ‘cha’ declared here
    7 |         int a[100050],cha[1000][1000];
      |                       ^~~