0_0_38522830_28096.cpp: In function 'int main()': 0_0_38522830_28096.cpp:61:30: error: 'a' was not declared in this scope memset(d,0,sizeof d);a ^ 0_0_38522830_28096.cpp:78:20: error: 'fb' was not declared in this scope if(fa!=fb) pre[fa]=fb; ^