View Compilation Error

0_0_21879031_32404.cpp:1:2: error: stray '#' in program
 z#include <algorithm>
  ^
0_0_21879031_32404.cpp:1:1: error: 'z' does not name a type
 z#include <algorithm>
 ^
0_0_21879031_32404.cpp: In function 'int main()':
0_0_21879031_32404.cpp:77:22: error: 'sort' was not declared in this scope
         sort(a, a + n);
                      ^