View Compilation Error

0_0_36331299_20003.cpp: In function 'void sove()':
0_0_36331299_20003.cpp:85:9: error: 'du' was not declared in this scope
         du = find1(u);
         ^
0_0_36331299_20003.cpp:86:9: error: 'dv' was not declared in this scope
         dv = find1(v);
         ^