View Compilation Error

0_0_21641875_13401.cpp: In function 'int main()':
0_0_21641875_13401.cpp:136:21: error: expected ')' before '{' token
    if((n/2- 1) <= k {
                     ^
0_0_21641875_13401.cpp:142:3: error: expected primary-expression before '}' token
   }
   ^