Giving me error on leetcode

Link to code-> https://ide.codingblocks.com/s/645809

Leetcode->https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/

error->Line 1034: Char 34: runtime error: addition of unsigned offset to 0x6030000000a0 overflowed to 0x60300000009c (stl_vector.h)
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/bin/…/lib/gcc/x86_64-linux-gnu/9/…/…/…/…/include/c++/9/bits/stl_vector.h:1043:34