View Compilation Error

0_0_36886713_19397.cpp: In function 'int main()':
0_0_36886713_19397.cpp:15:10: error: 'else' without a previous 'if'
          else
          ^
0_0_36886713_19397.cpp:17:17: error: 'y' was not declared in this scope
              if(y<ya)
                 ^
0_0_36886713_19397.cpp: At global scope:
0_0_36886713_19397.cpp:48:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_36886713_19397.cpp:49:1: error: expected declaration before '}' token
 }
 ^