(система)z=11/x – 13* y + x при a> 31-1/x+2* y - x при a< =3​

Возможный вариант в C++
#include <iostream>
int main()
{
    using namespace std;
    int N;
    cout << "Enter N: ";
    cin >> N;
    int num;
    int max = 1;
    int i;
    for (i = 0; i < N; ++i)
    {
        cout << "Enter #" << i + 1 << " number: ";
        cin >> num;
        if ((num - 9) % 10 != 0 && num % 3 == 0)
        {
            max = num;
            break;
        }
    }
    for (int j = i + 1; j < N; ++j)
    {
        cout << "Enter #" << j + 1 << " number: ";
        cin >> num;
        if ((num - 9) % 10 != 0 && num % 3 == 0)
            if (num > max)
                max = num;
    }
    if (max != 1)
        cout << "Max number div by 3 and don't end 9: " << max << endl;
    else
        cout << "No numbers div by 3 and don't end 9" << endl;
    return 0;
}

1)

var a:array[1..20] of integer;
max,min,n,i:integer;
begin

randomize;
n:=20;
for i:=1 to n do a[i]:=random(150);
begin
min:=a[1];
for i:=1 to n do if a[1]>a[i] then min:=a[i];
end;
begin
max:=a[1];
for i:=1 to n do if a[1]<a[i] then max:=a[i];
end;
writeln(min);
writeln(max);
end.

 

 

2)

const n=5;
var x: array[1..n,1..n] of integer;
i,j,s: integer;
begin
randomize;
writeln('Matrisa:');
for i:=1 to n do
begin
for j:=1 to n do
begin
x[i,j]:=random(200);
write(x[i,j]:5);
end;
writeln
end;
j:=8;
for i:=1 to n do
begin
j:=j-1;
s:=s+x[i,(n+1-i)];
end;
writeln('Summa: ',s);
end.