View Compilation Error

0_0_30018991_19664.cpp: In function 'int main()':
0_0_30018991_19664.cpp:41:3: error: 'L' was not declared in this scope
   L = 1, R = 31700, res = -1;
   ^
0_0_30018991_19664.cpp:41:10: error: 'R' was not declared in this scope
   L = 1, R = 31700, res = -1;
          ^
0_0_30018991_19664.cpp:41:21: error: 'res' was not declared in this scope
   L = 1, R = 31700, res = -1;
                     ^