View Compilation Error

0_0_17931502_6621.cpp: In function 'int main()':
0_0_17931502_6621.cpp:50:11: error: 'scan' was not declared in this scope
     scan(t);  
           ^
0_0_17931502_6621.cpp:53:18: error: 'scann' was not declared in this scope
         scann(x,n);  
                  ^