View Compilation Error

0_0_27944997_3826.cpp: In function 'int main()':
0_0_27944997_3826.cpp:32:32: error: 'v' was not declared in this scope
                 if(arr[j].a==i)v.push(arr[j].f);
                                ^
0_0_27944997_3826.cpp:34:18: error: 'v' was not declared in this scope
             sort(v.begin(),v.end(),cmp);
                  ^
0_0_27944997_3826.cpp:36:9: error: expected primary-expression before '}' token
         }
         ^