题解 | #四位数#

这道题太简单 #include <bits/stdc++.h> using namespace std; bool IsEqual(int num) { int ab = num / 100; int cd = num % 100; bool is_equal = ((ab + cd) *(ab + cd) == num); return is_equal; }

int main() {

int num;
cin >> num;
for (int i = 1000; i <= num; i++) {
    if (IsEqual(i)) {
        cout << i << endl;
    }
}
return 0;

}