View Compilation Error

0_0_31023288_11557.cpp: In function 'bool check(ll)':
0_0_31023288_11557.cpp:22:28: error: expected primary-expression at end of input
         int pos=lower_bound(
                            ^
0_0_31023288_11557.cpp:22:28: error: expected ',' or ';' at end of input
0_0_31023288_11557.cpp:22:28: error: expected '}' at end of input
0_0_31023288_11557.cpp:22:28: error: expected '}' at end of input