0_0_21107701_24665.cpp: In function 'void dfs(int, int, int)':
0_0_21107701_24665.cpp:22:11: error: 'si' was not declared in this scope
int s1 = si-di;
^
0_0_21107701_24665.cpp:22:14: error: 'di' was not declared in this scope
int s1 = si-di;
^
0_0_21107701_24665.cpp:23:14: error: 'sj' was not declared in this scope
int s2 = sj-dj;
^
0_0_21107701_24665.cpp:23:17: error: 'dj' was not declared in this scope
int s2 = sj-dj;
^
0_0_21107701_24665.cpp:28:11: error: 't' was not declared in this scope
tem = t-cnt - s1 - s2;
^
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