View Compilation Error

0_0_28953048_11844.cpp: In function 'll solution(int)':
0_0_28953048_11844.cpp:17:13: error: expected ',' or ';' before 'if'
             if ((n-2*i)%3==0)
             ^
0_0_28953048_11844.cpp:19:13: error: 'else' without a previous 'if'
             else
             ^
0_0_28953048_11844.cpp:20:35: error: expected ';' before ')' token
                 minn=min(minn,x+b));
                                   ^
0_0_28953048_11844.cpp:26:13: error: expected ',' or ';' before 'if'
             if ((n-2*i)%3==0)
             ^
0_0_28953048_11844.cpp:28:13: error: 'else' without a previous 'if'
             else
             ^
0_0_28953048_11844.cpp:29:35: error: expected ';' before ')' token
                 minn=min(minn,x+b));
                                   ^