View Compilation Error

0_0_33048031_7213.cpp: In function 'int main()':
0_0_33048031_7213.cpp:65:24: error: 'canf' was not declared in this scope
     while(~canf("%d",&n)) {
                        ^
0_0_33048031_7213.cpp:77:37: error: 'sort' was not declared in this scope
         sort(V[i].begin(),V[i].end());
                                     ^