foo.cc: In function 'bool cp(zy, zy)':
foo.cc:10:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  return a.nd>b.nd||a.nd==b.nd&&a.xh<b.xh; 
                    ~~~~~~~~~~^~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:20:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i=p;i<=q;i++)
     ^~~
foo.cc:22:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  return 0; 
  ^~~~~~

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