View Compilation Error

0_0_30127623_6032.cpp:3:1: error: 'cosnt' does not name a type
 cosnt int maxn = 1e5+7;
 ^
0_0_30127623_6032.cpp:4:7: error: 'maxn' was not declared in this scope
 int a[maxn], n, x, y;
       ^
0_0_30127623_6032.cpp: In function 'int main()':
0_0_30127623_6032.cpp:7:5: error: 'a' was not declared in this scope
     a[1] = a[2] = 1;
     ^
0_0_30127623_6032.cpp:8:24: error: 'maxn' was not declared in this scope
     for(int i = 3; i < maxn; i++)
                        ^
0_0_30127623_6032.cpp:10:15: error: 't' was not declared in this scope
  scanf("%d", &t); 
               ^
0_0_30127623_6032.cpp:16:26: error: 'pritnf' was not declared in this scope
   pritnf("%d\n", a[y-x+1]);
                          ^