foo.cpp: In function 'void solve()':
foo.cpp:82:35: error: expected primary-expression before '=' token
         scanf("%d%d%d",&u,&v,&op);=
                                   ^
foo.cpp:83:9: error: expected primary-expression before 'if'
         if (op==0)
         ^
foo.cpp:83:9: error: expected ';' before 'if'