0_0_33553090_8492.cpp: In function 'void dfs(int, int, int, int, int)':
0_0_33553090_8492.cpp:30:13: error: expected primary-expression at end of input
if (!k) return
^
0_0_33553090_8492.cpp:30:13: error: return-statement with a value, in function returning 'void' [-fpermissive]
0_0_33553090_8492.cpp:30:13: error: expected ';' at end of input
0_0_33553090_8492.cpp:30:13: error: expected '}' at end of input
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