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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#212441 | #4228. Double Sort | open your brain (Zhi Zhang, Yanru Guan, Jianfeng Zhu)# | WA | 1ms | 3888kb | C++14 | 1.0kb | 2023-10-13 15:55:42 | 2023-10-13 15:55:42 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long double f64;
const int N = 10005;
int n, m;
f64 val[N], ans[55], c[55][55], v[55];
int main() {
cin >> n >> m;
val[0] = 1;
for (int i = 1; i <= m - n; i++) {
val[i] = val[i - 1] * (m - n - i + 1) / (m - i + 1);
}
for (int i = 0; i <= n; i++) {
c[i][0] = c[i][i] = 1;
for (int j = 1; j < i; j++) {
c[i][j] = c[i - 1][j - 1] + c[i - 1][j];
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j * i + n - i <= m; j++) {
v[i] += val[i * (j - 1)];
}
}
for (int k = 1; k <= n; k++) {
for (int j = k; j <= n; j++) {
int fg = (j - k) % 2 ? -1 : 1;
ans[k] += fg * c[n][j] * v[j] * c[j - 1][k - 1];
}
}
reverse(ans + 1, ans + n + 1);
for (int i = 2; i <= n; i++) {
ans[i] += ans[i - 1];
}
for (int i = 1; i <= n; i++) {
cout << fixed << setprecision(10) << ans[i] << endl;
}
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3696kb
input:
3 5
output:
1.0000000000 2.3000000000 4.5000000000
result:
ok 3 numbers
Test #2:
score: 0
Accepted
time: 0ms
memory: 3748kb
input:
5 17
output:
1.1313833226 2.7483839690 5.1830963154 8.8556884292 15.0000000000
result:
ok 5 numbers
Test #3:
score: -100
Wrong Answer
time: 1ms
memory: 3888kb
input:
50 10000
output:
4.4328164335 12.8365968668 25.3152687339 41.9556112383 62.8480760618 88.0871546758 117.7716337785 152.0048947857 190.8952419054 234.5562640721 283.1072162272 336.6735753002 395.3866945388 459.3890906455 528.8083566310 603.8922866465 684.3850329997 772.1538509013 861.4143947245 972.0596355082 1045.81...
result:
wrong answer 13th numbers differ - expected: '395.3871004', found: '395.3866945', error = '0.0000010'