Сделайте под буквой а) , ж) , и) БЫСТРЕЙ

#include <iostream>
#include <cmath>
using namespace std;

void main() 
{
int n,sum=0; 
float y,k=0; 
cin >> n; 
int *mass = new int[n]; 
for (int i = 0;i < n;++i) 
{
cin >> mass[i]; 
} 
for (int i = 0;i < n;++i) 
{ 
if (mass[i] >0 )
{
k++;
y=pow(mass[i],2); 
cout<<y;
sum+=mas[i]
}
} 
system("pause"); 
}

2)#include <iostream>
#include <cmath>
using namespace std;

void main() 
{
int s,p,r,day=0;
cin >> s>>p>>r;
float km=s;
while(r>km)
{
km+=km*p/100;
day++;
}
cout << " km = " << km << " day = " << day << endl;
system ("pause");
}

Вот в двоичной системе:
110010001100110111010100110011101101000011001100110000001101001011001000110010101100000000100000100101110010000011011101110100101100111000100000110011011100000011010011110010101100000000100000110011100010000011010001110011111100111011010001110011101100000111000000110101010010000011001111110011101100101111010011110101111100010111001101110010001101111100101100001000001100110111000000110010101100111011001111110010111100010111001101110010001101111100101100001000001100111011000001110100001100000011000001110011101101001011001010110010000010110000100000110011111100010111010000110001011100010011000000110101111100100000100000110010000010000011001111110100001100010111000100110100011101001011000000110000101100101111000101110011011100100011011111001000001100100011001101110101001100111011010000110011001100000011010110110010001100100000101110