View Compilation Error

0_0_33701387_18585.cpp: In function 'int main()':
0_0_33701387_18585.cpp:82:28: error: 'u' was not declared in this scope
              scanf("%d%d",&u,&v);
                            ^
0_0_33701387_18585.cpp:82:31: error: 'v' was not declared in this scope
              scanf("%d%d",&u,&v);
                               ^