View Compilation Error

0_0_39664605_19105.cpp: In function 'int main()':
0_0_39664605_19105.cpp:17:9: error: 'tot' was not declared in this scope
   17 |         tot=2*n;
      |         ^~~
0_0_39664605_19105.cpp:39:37: error: 'now' was not declared in this scope
   39 |                 pos = (pos==total?1:now);
      |                                     ^~~