View Compilation Error

0_0_18461322_2565.cpp: In function 'void dfs(int)':
0_0_18461322_2565.cpp:61:26: error: 'find1' was not declared in this scope
     int x = find1(from[u]), y = find1(tto[u]);
                          ^
0_0_18461322_2565.cpp:62:13: error: 'y' was not declared in this scope
     if(x != y)
             ^
0_0_18461322_2565.cpp:75:13: error: 'y' was not declared in this scope
     if(x != y)
             ^