문제
풀이
#include <algorithm>
#include <iostream>
using namespace std;
long long solve(void) {
long long a, b, c, d, u; cin >> a >> b >> c >> d >> u;
long long ans = max(0LL, u - a + b) / b;
if (d == 1 && c <= u) {
if (a > c || (c - a) % b) ans++;
return ans;
}
for (long long i=c; i<=u; i*=d) {
if (a > i || (i - a) % b) ans++;
}
return ans;
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << solve();
return 0;
}