View Compilation Error

0_0_18565901_24314.cpp: In function 'int main()':
0_0_18565901_24314.cpp:36:12: error: expected ';' before numeric constant
    up+=a[i]8down;
            ^
0_0_18565901_24314.cpp:38:4: error: expected ';' before 'swap'
    swap(up,down);
    ^