View Compilation Error

0_0_27107616_12590.cpp:21:9: error: conflicting declaration 'int ans'
 int n,x,ans;
         ^
0_0_27107616_12590.cpp:20:4: note: previous declaration as 'll ans'
 ll ans;
    ^
0_0_27107616_12590.cpp: In function 'int main()':
0_0_27107616_12590.cpp:36:25: error: 'b' was not declared in this scope
             scnaf("%d",&b[i]);
                         ^
0_0_27107616_12590.cpp:38:14: error: 'b' was not declared in this scope
         sort(b,b+n);
              ^