fix-out-of-bound-index-for-std-vector.md

description
runtime error: addition of unsigned offset to 0x603000000040 overflowed to 0x60300000003c (stl_vector.h)

fix: out-of-bound index for std::vector

You set i to 0

int i=0;

Then you set k to 0.

int k=i;

Then you use k-1 to index std::vector<std::string> v.

while(v[k-1].length()

k-1 is -1, but it gets worse. std::vector::operator[] casts the parameter to an unsigned type, producing an impossibly huge, not-at-all-valid index.

No bounds checking is performed with std::vector::operator[] and you end up treating memory you don't own as if it were a validly constructed std::string.