View Compilation Error

0_0_15735167_14381.cpp: In function 'int main()':
0_0_15735167_14381.cpp:28:4: error: expected '}' before 'else'
    else if(s==n||s==1)
    ^
0_0_15735167_14381.cpp: At global scope:
0_0_15735167_14381.cpp:38:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_15735167_14381.cpp:39:1: error: expected declaration before '}' token
 }
 ^