View Compilation Error

0_0_21775387_10902.cpp: In function 'int main()':
0_0_21775387_10902.cpp:28:26: error: expected ';' before ')' token
    for(int j=maxn;j>=w[i])
                          ^
0_0_21775387_10902.cpp:31:18: error: 'a' was not declared in this scope
    for(int j=1;j+a[i]<maxn;j++)
                  ^