Almost two dozen North Korean athletes received permission from the International Olympic Committee to compete in the Winter Games, which take place February 9-25.
North Korea also criticised U.S. Vice President Mike Pence's pending visit to the Olympics, accusing Washington of halting improvements in inter-Korean relations.
Displaying a North Korean national flag in a public place is prohibited in South Korea under its anti-North Korean security law.
The trio had to walk as "Independent Athletes" behind the International Olympic Committee flag during the opening ceremony as the Indian Olympic Association was under suspension at that time. That brings the total athletes participating to 2,925, which means organizers are allotting about 37 condoms to each player for a16-day stay.
But referencing a Friday call with South Korean President Moon Jae-in, Trump said that ongoing inter-Korean Winter Olympics rapprochement could be considered a "good thing, not a bad thing".
They also will be getting about 110,000 condoms, the reports.
Organisers of the 2018 Winter Olympics are stockpiling condoms in the athletes village.
Trump was apparently referring to what he regularly says was a lack of sufficient attention by former administrations to the North Korea issue, but didn't explain the implication of reaching the "end of the road".
As previously reported, in August 2017, on the eve of the ice show in Korea, the Kazakh athlete suffered an ankle injury but managed to recover for the Olympics. "We're going to find out how it goes".
"We don't expect the athletes to use them all", he said.
When asked to compare the ski resort to South Korean ski facilities, athletes told reporters there that Masikryong "wasn't largely lacking".