0_0_20017601_26818.cpp: In function 'int bfs(int)': 0_0_20017601_26818.cpp:33:5: error: 'a' was not declared in this scope if(a>y)return (x-y); ^ 0_0_20017601_26818.cpp:33:17: error: 'x' was not declared in this scope if(a>y)return (x-y); ^