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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#166955 | #6869. SPY finding NPY | PPP# | AC ✓ | 92ms | 3648kb | C++17 | 1.1kb | 2023-09-06 21:37:56 | 2023-09-06 21:37:57 |
Judging History
answer
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
//#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const ll mod = 1000000007;
#define X first
#define Y second
ll pew(ll a, ll b)
{
ll res = 1;
while (b>0)
{
if (b&1) res = res*a%mod;
b >>= 1;
a = a*a%mod;
}
}
vector<ld> A;
void prec()
{
const int mx = 10000;
A.resize(mx+1);
int P = 1;
ld eps = 1e-12;
for (int n=3;n<=mx;n++)
{
ld x = 0;
for (int i=P;i<n;i++) x += P*1.0/i;
while (true)
{
int P2 = P+1;
ld x2 = 0;
for (int i=P2;i<n;i++) x2 += P2*1.0/i;
if (x>=x2+eps) break;
x = x2, P = P2;
}
A[n] = P;
}
}
void solve()
{
int n;
cin >> n;
cout << A[n] << "\n";
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
//#ifdef DEBUG
// freopen("input.txt", "r", stdin);
//#endif
prec();
int T = 1;
cin >> T;
while (T--) solve();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 92ms
memory: 3648kb
input:
10000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 10...
output:
0 0 1 1 2 2 2 3 3 3 4 4 5 5 5 6 6 6 7 7 8 8 8 9 9 9 10 10 10 11 11 12 12 12 13 13 13 14 14 15 15 15 16 16 16 17 17 17 18 18 19 19 19 20 20 20 21 21 22 22 22 23 23 23 24 24 24 25 25 26 26 26 27 27 27 28 28 29 29 29 30 30 30 31 31 31 32 32 33 33 33 34 34 34 35 35 35 36 36 37 37 37 38 38 38 39 39 40 40...
result:
ok 10000 lines