View Compilation Error

0_0_20910366_21197.cpp: In function 'int main()':
0_0_20910366_21197.cpp:9:5: error: 'cin' was not declared in this scope
     cin>>t;
     ^
0_0_20910366_21197.cpp:12:31: error: 'memset' was not declared in this scope
         memset(dp,0,sizeof(dp));
                               ^
0_0_20910366_21197.cpp:24:44: error: 'printf' was not declared in this scope
         printf("Case #%d: %lld\n",cas++,res);
                                            ^