0_0_37779098_20080.cpp:5:1: error: 'll' does not name a type ll a[MAXN]; ^ 0_0_37779098_20080.cpp: In function 'int main()': 0_0_37779098_20080.cpp:13:10: error: 'a' was not declared in this scope memset(a,0,sizeof(a)); ^