View Compilation Error

0_0_17045275_7677.cpp:6:16: error: expected primary-expression before ';' token
 const int maxn=;
                ^
0_0_17045275_7677.cpp:8:19: error: size of array 'mat' is not an integral constant-expression
 int mat[maxn][maxn];
                   ^
0_0_17045275_7677.cpp:8:19: error: size of array 'mat' is not an integral constant-expression