View Compilation Error

0_0_16755272_25581.cpp: In function 'int main()':
0_0_16755272_25581.cpp:54:18: error: 'gmax' was not declared in this scope
    gmax(top, a[i]);
                  ^
0_0_16755272_25581.cpp:67:3: error: 'LL' was not declared in this scope
   LL ans = 0;
   ^
0_0_16755272_25581.cpp:70:4: error: 'ans' was not declared in this scope
    ans = (ans + (LL)f[n + 1][j] * j) % Z;
    ^
0_0_16755272_25581.cpp:70:21: error: expected ')' before 'f'
    ans = (ans + (LL)f[n + 1][j] * j) % Z;
                     ^
0_0_16755272_25581.cpp:72:20: error: 'ans' was not declared in this scope
   printf("%lld\n", ans);
                    ^