View Compilation Error

0_0_36372131_14736.cpp: In function 'int main()':
0_0_36372131_14736.cpp:65:4: error: 'else' without a previous 'if'
    else r=mid-1;
    ^
0_0_36372131_14736.cpp:68:3: error: expected primary-expression before '}' token
   }
   ^