View Compilation Error

0_0_38527736_31955.cpp:15:21: error: redefinition of 'int v [20]'
 int n, m, c[N], v[20];
                     ^
0_0_38527736_31955.cpp:12:19: note: 'int v [20]' previously declared here
 int cnt[1 << 12], v[20], siz[N], ma_root, root, vn;
                   ^