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#include <iostream> using namespace std; int main(){ double a; long long result = 0; cin >> a; if (a == 5) { result += 25; } else { double new_a =(int)a / 10; result = new_a * (new_a + 1) * 100 + 25; } cout << result; }
#include <iostream> using namespace std; int main(){ double a; long long result = 0; cin >> a; if (a == 5) { result += 25; } else { double new_a =(int)a / 10; result = new_a * (new_a + 1) * 100 + 25; } cout << result; }