0_0_25396304_20237.cpp: In function 'void build()': 0_0_25396304_20237.cpp:33:12: error: 'l' was not declared in this scope if(l>=r) continue; ^ 0_0_25396304_20237.cpp:33:15: error: 'r' was not declared in this scope if(l>=r) continue; ^