0_0_19609872_15278.cpp: In function 'void dfs0(int, int)':
0_0_19609872_15278.cpp:44:23: error: 'visf' was not declared in this scope
viss[t] = visf[t];
^
0_0_19609872_15278.cpp: In function 'void dfs1(int, int, int)':
0_0_19609872_15278.cpp:56:13: error: 'visf' was not declared in this scope
if (visf[fa] == t) {
^
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