0_0_30467112_22550.cpp: In function 'void union_tree(int, int)':
0_0_30467112_22550.cpp:24:10: error: return-statement with a value, in function returning 'void' [-fpermissive]
return 0;
^
0_0_30467112_22550.cpp:34:10: error: return-statement with a value, in function returning 'void' [-fpermissive]
return 1;
^
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