View Compilation Error

0_0_13828160_24211.cpp: In function 'int main()':
0_0_13828160_24211.cpp:30:14: error: 'i' was not declared in this scope
         for( i=0;i<n;i++)
              ^
0_0_13828160_24211.cpp:42:22: error: 'j' was not declared in this scope
             for( i=0,j=1;i<pl&&j<2*pl;i++)
                      ^