链家第二题求找错，10%，明明接受了多组数据
#include <iostream>
using namespace std;
int main() {
int n;
while (cin >> n){
if (n <= 3) {
cout << 0<<endl;
continue;
}
int fst = 1, scd = 2, ct = 2;
int cur = fst + scd;
while (cur <= n)
{
++ct;
fst = scd;
scd = cur;
cur = fst + scd;
}
cout << n - ct<<endl;
}
}
using namespace std;
int main() {
int n;
while (cin >> n){
if (n <= 3) {
cout << 0<<endl;
continue;
}
int fst = 1, scd = 2, ct = 2;
int cur = fst + scd;
while (cur <= n)
{
++ct;
fst = scd;
scd = cur;
cur = fst + scd;
}
cout << n - ct<<endl;
}
}
