View Compilation Error

0_0_27136077_3570.cpp: In function 'int solve()':
0_0_27136077_3570.cpp:9:16: error: 'reutrn' was not declared in this scope
  if ( n == 1 ) reutrn 0;
                ^
0_0_27136077_3570.cpp:11:17: error: 'reutrn' was not declared in this scope
   if ( s == t ) reutrn -1;
                 ^
0_0_27136077_3570.cpp:13:40: error: 'abs' was not declared in this scope
   else if ( s == 1 || s == n || abs(s-t)==1 ) return 1;
                                        ^