View Compilation Error

0_0_30082690_26856.cpp: In function 'int main()':
0_0_30082690_26856.cpp:10:12: error: 'u1' was not declared in this scope
         if(u1 < d1) a = -1;
            ^
0_0_30082690_26856.cpp:10:17: error: 'd1' was not declared in this scope
         if(u1 < d1) a = -1;
                 ^
0_0_30082690_26856.cpp:12:12: error: 'u2' was not declared in this scope
         if(u2 < d2) b = -1;
            ^
0_0_30082690_26856.cpp:12:17: error: 'd2' was not declared in this scope
         if(u2 < d2) b = -1;
                 ^
0_0_30082690_26856.cpp:14:12: error: 'u3' was not declared in this scope
         if(u3 < d3) c = -1;
            ^
0_0_30082690_26856.cpp:14:17: error: 'd3' was not declared in this scope
         if(u3 < d3) c = -1;
                 ^