View Compilation Error

0_0_34814603_13047.cpp: In function 'int main()':
0_0_34814603_13047.cpp:79:20: error: missing template arguments before 't'
             vector t={1};
                    ^
0_0_34814603_13047.cpp:80:21: error: 't' was not declared in this scope
             f=add(f,t);
                     ^