M=3, if the condition in the first judgment box is met, execute Yes. At this time, a=4, b=5, m=3, and b2=a2+m2, so it is a right triangle. If the conditions in the second judgment box are not met, then NO is executed;
M=4, the condition in the first judgment box is met, and Yes is executed. At this time, a=4, b=5, and m=4 is an acute triangle because B2 < A2+M2, the condition in the second judgment box is met, and Yes is executed.
N= 1,m=5。 If the condition in the first judgment box is not satisfied, execute "No" and output n as 1.
So the answer is: 1.