View Compilation Error

0_0_18787521_11043.cpp: In function 'void init()':
0_0_18787521_11043.cpp:9:11: error: 'maxn' was not declared in this scope
     int N=maxn;
           ^
0_0_18787521_11043.cpp:14:5: error: 'cnt' was not declared in this scope
     cnt = 0;
     ^