#include <iostream>
int main(){
int n,k,l;
std::cout << "Сколько всего экзаменов у нас было?";
std::cin >> k;
std::cout << "\nСколько экзаменов на пересдачу?";
std::cin >> l;
n = k - l;
std::cout << "\nБлагодоря Cyberforum мы успешно сдали " << n << " ";
if(n > 4 && n < 21)
std::cout << "экзаменов.\n";
else
switch(n % 10){
case 1:
std::cout << "экзамен.\n";
break;
case 2:
case 3:
case 4:
std::cout << "экзамена.\n";
break;
default:
std::cout << "экзаменов.\n";
}
if (l == 0)
std::cout << "Мы молодцы!\n";
return 0;
}
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