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- #include<iostream>
- using namespace std;
- int main()
- {
- setlocale(LC_ALL, "Russian");
- int a, b, c,res,i,n,m;
- res = 0;
- cout << "Введите число ";
- cin >> n;
- for (i = 100; i <= 999; i++)
- {
- a = i / 100;
- b = (i % 100) / 10;
- c = i % 10;
- if (a + b + c == n);
- {
- res++;
- }
- }
- cout << "Колличество натуральных трёхзначных чисел" << res;
- }
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