0_0_25663604_4459.cpp: In function 'void dfs(int, int, int)': 0_0_25663604_4459.cpp:10:11: error: 'ex' was not declared in this scope if(x==ex&&y==ey) ^ 0_0_25663604_4459.cpp:10:18: error: 'ey' was not declared in this scope if(x==ex&&y==ey) ^