0_0_29921732_11388.cpp: In function 'void update(int, int, int, int, int, int)':
0_0_29921732_11388.cpp:36:5: error: 'ql' was not declared in this scope
if(ql==0&&qr==0) return ;
^
0_0_29921732_11388.cpp:36:12: error: 'qr' was not declared in this scope
if(ql==0&&qr==0) return ;
^
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