View Compilation Error

0_0_28587262_16414.cpp: In function 'int main()':
0_0_28587262_16414.cpp:12:19: error: 'A' was not declared in this scope
   sort(a+1,a+n+1);A
                   ^
0_0_28587262_16414.cpp:13:15: error: 'i' was not declared in this scope
   for(int i=2;i<=n;i++)
               ^
0_0_28587262_16414.cpp:14:16: error: 'j' was not declared in this scope
    for(int j=1;j<=k;j++)dp[i][j]=999999999999999999;
                ^