0_0_13503522_21558.cpp: In function 'int dfs(int, int, int, int, int)':
0_0_13503522_21558.cpp:9:15: error: '_l1' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1);
^
0_0_13503522_21558.cpp:9:20: error: '_r1' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1);
^
0_0_13503522_21558.cpp:9:25: error: '_l2' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1);
^
0_0_13503522_21558.cpp:9:30: error: '_r2' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1);
^
0_0_13503522_21558.cpp:11:15: error: '_l1' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1) + now;
^
0_0_13503522_21558.cpp:11:20: error: '_r1' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1) + now;
^
0_0_13503522_21558.cpp:11:25: error: '_l2' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1) + now;
^
0_0_13503522_21558.cpp:11:30: error: '_r2' was not declared in this scope
return dfs(_l1, _r1, _l2, _r2, now >> 1) + now;
^
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