Simulate the Linker

Implement a tiny model of symbol resolution: ``c int resolve(int *symbols, size_t n, const char *want); ` symbols encodes definitions across object files: each element is 1 (definition), 0 (declaration only), or -1 (duplicate definition). resolve returns: 0 if there is exactly one definition and at least one declaration-or-definition overall, -1 if there are zero definitions, and 1` if there are two or more definitions (multiple definition error). NULL or empty input returns -1 (nothing defined).

Difficulty: intermediate