View Compilation Error

0_0_38631593_12136.cpp:14:9: error: 'mod' was not declared in this scope
 int vis[mod];
         ^~~
0_0_38631593_12136.cpp:14:9: note: suggested alternative: 'modf'
 int vis[mod];
         ^~~
         modf
0_0_38631593_12136.cpp: In function 'int check()':
0_0_38631593_12136.cpp:28:5: error: 'vis' was not declared in this scope
     vis[p]=cnt;
     ^~~