The ICPC is in Bangladesh this year. travel.state.gov warns

"We strongly recommend obtaining a visa before traveling. Although U.S. citizens are eligible to apply for a tourist visa on arrival, there is no guarantee you will receive one. U.S. citizens born outside the United States may be subject to increased scrutiny or further requirements at the port of entry. Recently, some U.S. citizens have been denied entry into Bangladesh despite believing they had fulfilled the requirements for a visa on arrival."

My student will attempt to get a visa on arrival. Will they succeed?

Sep 22, 10:34am: Two students are attempting this, so changed the question to "both students". If they get a visa ahead of time or miss their flight and do not attempt to get a visa on arrival, still resolves yes.

The contest schedule starts on Nov 6.

Sep 30, 1:23pm: All 3 students are attempting. I and the other coach might too...