View Compilation Error

0_0_21443250_9760.cpp: In function 'int main()':
0_0_21443250_9760.cpp:32:53: error: '_MAX' was not declared in this scope
    c[k][j]=_MAX(c[k-t*w[j]][j]+a[j]*t+b[j],c[k][j-1]);
                                                     ^