View Compilation Error

0_0_36365317_30910.cpp: In function 'int main()':
0_0_36365317_30910.cpp:136:13: error: 'j' was not declared in this scope
      ope(sa[j],sa[j+i],sa[j+i+i]);
             ^
0_0_36365317_30910.cpp:147:13: error: 'j' was not declared in this scope
      epo(sd[j],sd[j+i],sd[j+i+i]);
             ^