View Compilation Error

0_0_21658923_19756.cpp: In function 'int main()':
0_0_21658923_19756.cpp:23:32: error: expected primary-expression before '<' token
         for(int k=1; k<=n; k++)<span style="white-space:pre">     //瞎搞搞
                                ^
0_0_21658923_19756.cpp:23:33: error: 'span' was not declared in this scope
         for(int k=1; k<=n; k++)<span style="white-space:pre">     //瞎搞搞
                                 ^