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  1. #include <unordered_set>
  2. using namespace std;
  3.  
  4. int main() {
  5. unordered_set<int> us;
  6. unordered_set<int>::iterator it = us.end();
  7. --it;
  8. }
Compilation error #stdin compilation error #stdout 0s 0KB
stdin
Standard input is empty
compilation info
prog.cpp: In function ‘int main()’:
prog.cpp:7:7: error: no match for ‘operator--’ in ‘--it’
stdout
Standard output is empty