View Compilation Error

0_0_28441223_19759.cpp: In function 'int main()':
0_0_28441223_19759.cpp:19:9: error: 'LL' was not declared in this scope
         LL ans=0;
         ^
0_0_28441223_19759.cpp:30:29: error: 'memset' was not declared in this scope
         memset(c,0,sizeof(c));
                             ^
0_0_28441223_19759.cpp:44:21: error: 'ans' was not declared in this scope
                     ans=ans+500*f[i].x+2*f[i].y;
                     ^
0_0_28441223_19759.cpp:49:25: error: 'ans' was not declared in this scope
         cout<<num<<" "<<ans<<endl;
                         ^