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  1. #include <iostream>
  2. using namespace std;
  3. int main() {
  4. for ( int a , b ; a<=b ; a=a+1 ) {
  5. cout << a ;
  6. }
  7. return 0;
  8. }
Success #stdin #stdout 0.01s 5308KB
stdin
1 9
stdout
Standard output is empty