View Compilation Error

0_0_35960041_20737.cpp: In function 'int main()':
0_0_35960041_20737.cpp:66:25: error: redeclaration of 'long long int a [7][7]'
         int a[maxn][maxn]{
                         ^
0_0_35960041_20737.cpp:56:13: note: 'long long int a [7][7]' previously declared here
         int a[maxn][maxn]={
             ^