View Compilation Error

0_0_12206015_26746.cpp:60: error: redefinition of `const int maxn'
0_0_12206015_26746.cpp:10: error: `const int maxn' previously defined here
0_0_12206015_26746.cpp: In function `int main()':
0_0_12206015_26746.cpp:61: error: redefinition of `int main()'
0_0_12206015_26746.cpp:11: error: `int main()' previously defined here