View Compilation Error

0_0_21411029_10566.cpp: In function 'int main()':
0_0_21411029_10566.cpp:57:41: error: void value not ignored as it ought to be
       scanf("%d", &a[i]), f[a[i]]++, mx = gmax(mx, a[i]), mi = gmin(mi, a[i]);
                                         ^
0_0_21411029_10566.cpp:57:62: error: void value not ignored as it ought to be
       scanf("%d", &a[i]), f[a[i]]++, mx = gmax(mx, a[i]), mi = gmin(mi, a[i]);
                                                              ^