View Compilation Error

0_0_26214526_8508.cpp: In function 'int main()':
0_0_26214526_8508.cpp:11:23: error: expected ';' before ')' token
         for(a=k-1;a>=1){
                       ^
0_0_26214526_8508.cpp:14:27: error: expected ';' before ')' token
         for(a=k+1,a<=n;a++){
                           ^