Question

Найти алгоритм решения задачи и реализовать его с помощью оператора(операторов) if-then-else. В Атлантическом океане терпит бедствие пассажирский теплоход ”Посудина”. Все пассажиры будут спасены, если на помощь успеют два судна. Судно продержится на плаву t часов. Скорость судов-спасателей 40 узлов. Составить программу, определяющую спасутся ли пассажиры. Известны расстояния от трех судов-спасателей до тонущего судна.

Answer 1

Const
  v=40;
var
  t,r1,r2,r3:real;
  n:integer;
begin
write('Сколько часов продержатся пассажиры? ');
readln(t);
write('Введите расстояния до трех спасателей (в узлах): ');
readln(r1,r2,r3);
if r1/v<t then n:=1;
if r2/v<t then n:=n+1;
if r3/v<t then n:=n+1; 
If n>1 then writeln('Спасутся все')
  else
    if n>0 then writeln('Спасется половина пассажиров')
      else writeln('Никто не спасется')
end.    

Answer 2

Algorithm to Determine if Passengers Will Be Saved

To solve the problem of determining whether the passengers of the sinking ship "Посудина" in the Atlantic Ocean will be saved, we can use the following algorithm:

1. Define the variables: - `t`: The number of hours the sinking ship can stay afloat. - `v1`: The speed of the first rescue ship in knots. - `v2`: The speed of the second rescue ship in knots. - `d1`: The distance between the sinking ship and the first rescue ship in nautical miles. - `d2`: The distance between the sinking ship and the second rescue ship in nautical miles.

2. Calculate the time it takes for each rescue ship to reach the sinking ship: - `t1 = d1 / v1`: Time taken by the first rescue ship to reach the sinking ship. - `t2 = d2 / v2`: Time taken by the second rescue ship to reach the sinking ship.

3. Use the `if-then-else` operator to determine if the passengers will be saved: - If `t1 <= t` and `t2 <= t`, then both rescue ships will reach the sinking ship within the given time, and the passengers will be saved. - If only one of the conditions is true (`t1 <= t` or `t2 <= t`), then only one rescue ship will reach the sinking ship within the given time, and the passengers will be saved. - If both conditions are false (`t1 > t` and `t2 > t`), then neither rescue ship will reach the sinking ship within the given time, and the passengers will not be saved.

Here's a Python implementation of the algorithm using the `if-then-else` operator:

t = # Enter the value of t (number of hours the sinking ship can stay afloat)
v1 = 40  # Speed of the first rescue ship in knots
v2 = 40  # Speed of the second rescue ship in knots
d1 = # Enter the distance between the sinking ship and the first rescue ship in nautical miles
d2 = # Enter the distance between the sinking ship and the second rescue ship in nautical miles

t1 = d1 / v1
t2 = d2 / v2

if t1 <= t and t2 <= t:
    print("The passengers will be saved.")
elif t1 <= t or t2 <= t:
    print("Some of the passengers will be saved.")
else:
    print("The passengers will not be saved.")

Please note that you need to provide the values for `t`, `d1`, and `d2` in the code above to get the correct result.

Remember to replace the comments in the code with the appropriate values.

Keep in mind that this algorithm assumes constant speeds for the rescue ships and does not take into account any other factors that may affect the rescue operation.