View Compilation Error

0_0_33541020_13877.cpp: In function 'int main()':
0_0_33541020_13877.cpp:6:15: error: 'read' was not declared in this scope
 int tt = read()
               ^
0_0_33541020_13877.cpp:7:18: error: expected ';' before ')' token
   for (; tt; --tt) {
                  ^