foo.cc: In function 'int main()':
foo.cc:14:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   14 |     for(int i=0;i<j;i++)
      |     ^~~
foo.cc:17:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   17 |         for(int i=0;i<j;i++)
      |         ^~~
foo.cc:42:22: warning: statement has no effect [-Wunused-value]
   42 |                 l1[i]==false;
      |                 ~~~~~^~~~~~~
foo.cc:10:19: warning: unused variable 'y2' [-Wunused-variable]
   10 |         int y1[N],y2[N];
      |                   ^~
foo.cc:19:25: warning: 'a' may be used uninitialized [-Wmaybe-uninitialized]
   19 |                         if(a==0)l1[i]=true;
      |                         ^~
foo.cc:20:9: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized]
   20 |         if(b<0)
      |         ^~

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