View Compilation Error

0_0_21608954_11560.cpp: In function 'void go(int)':
0_0_21608954_11560.cpp:59:19: error: 'st' was not declared in this scope
         int u=0,l=st
                   ^
0_0_21608954_11560.cpp:59:19: error: expected ',' or ';' at end of input
0_0_21608954_11560.cpp:59:19: error: expected '}' at end of input
0_0_21608954_11560.cpp:59:19: error: expected '}' at end of input