foo.cc: In function 'int ddd()':
foo.cc:30:1: warning: no return statement in function returning non-void [-Wreturn-type]
   30 | }
      | ^
foo.cc: In function 'int main()':
foo.cc:80:30: error: expected ']' before ')' token
   80 |    if (noc[e[i]+noc[e[i^1]]>0)continue;
      |                              ^
      |                              ]

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