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Add this to your ~/.bashrc to kill a port.

kp() {
if [ -z "$1" ]; then
echo "Usage: kp <port_number>"
else
sudo kill -9 $(sudo lsof -t -i:$1) 2>/dev/null && echo "Process on port $1 killed" || echo "No process found on port $1"
fi
}
Three airline companies operate flights from Dodola island. Each company has a different schedule of departures. The first company departs every 100 days, the second every 120 days and the third every 150 days. What is the greatest positive integer d for which it is true that there will be d consecutive days without a flight from Dodola island, regardless of the departure times of the various airlines?


AI Mathematical Olympiad - Progress Prize 2