View Compilation Error

0_0_31547869_21948.cpp: In function 'int main()':
0_0_31547869_21948.cpp:49:57: error: 'avg' was not declared in this scope
    for (int j = i * m; j < (i + 1) * m; j++) if (a[j] < avg[j % m]) flag = false;
                                                         ^