Problem	uniquenumbers
User	KJF
Submission Time	2026-02-18 22:17:48
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

uniquenumbers.cpp:13:16: error: empty character constant
13 | string num = '';
| ^~
uniquenumbers.cpp: In function ‘int main()’:
uniquenumbers.cpp:13:16: error: conversion from ‘char’ to non-scalar type ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} requested
uniquenumbers.cpp:15:22: error: cannot convert ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} to ‘const key_type&’ {aka ‘const long long int&’}
15 | if (not seen.count(num)) {
| ^~~
| |
| std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/9/unordered_set:47,
from uniquenumbers.cpp:2:
/usr/include/c++/9/bits/unordered_set.h:668:29: note: initializing argument 1 of ‘std::unordered_set<_Value, _Hash, _Pred, _Alloc>::size_type std::unordered_set<_Value, _Hash, _Pred, _Alloc>::count(const