foo.cc: In function ‘int main()’:
foo.cc:9:9: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
    9 |         if((y%4==0&&y%100!=0)||y%400==0)
      |         ^~
foo.cc:11:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
   11 |                 cout<<a[m];
      |                 ^~~~