View Compilation Error

0_0_18125140_1053.cpp: In function 'int main()':
0_0_18125140_1053.cpp:201:1: error: 'o' was not declared in this scope
 o     int e=find(i);
 ^
0_0_18125140_1053.cpp:204:13: error: 'e' was not declared in this scope
      add(ep,e,INF);
             ^