《关于I题玄学AC这档事》
RT
#include <bits/stdc++.h> using namespace std; int read() { char ch = getchar(); int x = 0, pd = 0; while (ch < '0' || ch > '9') pd |= ch == '-', ch = getchar(); while ('0' <= ch && ch <= '9') x = x * 10 + (ch ^ 48), ch = getchar(); return pd ? -x : x; } void f(){ int x = read(); double k = (x + 1) * 1.0 / x; double ans = pow(k, x); printf("%.3lf\n", ans); } int main() { f(); return 0; }