#include <bits/stdc++.h>
using namespace std;
pair<double, double> a[505];
double dp[505][505][2];
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, k;
cin >> n >> k;
for (int i=1; i<=n; i++)
{
cin >> a[i].second >> a[i].first;
if (a[i].first==-1)
a[i].first=1e9;
}
sort(a+1, a+n+1);
double ans=1e9;
for (int m=0; m<=k; m++)
{
for (int i=0; i<=n; i++)
for (int j=0; j<=k-m; j++)
dp[i][j][0]=dp[i][j][1]=1e9;
dp[0][0][1-(bool)m]=0;
for (int i=1; i<=n; i++)
{
for (int j=0; j<=min(i, k-m); j++)
{
if (i-j<m)
{
if (!j)
dp[i][j][0]=dp[i-1][j][0]+a[i].first/(i-j);
else if (j==i)
dp[i][j][0]=dp[i-1][j-1][0]+a[i].second/(m+1);
else
dp[i][j][0]=min(dp[i-1][j][0]+a[i].first/(i-j), dp[i-1][j-1][0]+a[i].second/(m+1));
}
else
{
dp[i][j][1]=dp[i-1][j][1];
if (j)
dp[i][j][1]=min(dp[i][j][1], dp[i-1][j-1][1]+a[i].second/(m+1));
if (i-j==m)
dp[i][j][1]=min(dp[i][j][1], dp[i-1][j][0]+a[i].first/m);
}
}
}
ans=min(ans, dp[n][k-m][1]);
}
cout << ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
3 ms |
3676 KB |
Output is correct |
6 |
Correct |
11 ms |
3932 KB |
Output is correct |
7 |
Correct |
38 ms |
4188 KB |
Output is correct |
8 |
Correct |
83 ms |
4188 KB |
Output is correct |
9 |
Correct |
139 ms |
4184 KB |
Output is correct |
10 |
Correct |
69 ms |
4408 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
3 ms |
3676 KB |
Output is correct |
6 |
Correct |
11 ms |
3932 KB |
Output is correct |
7 |
Correct |
38 ms |
4188 KB |
Output is correct |
8 |
Correct |
83 ms |
4188 KB |
Output is correct |
9 |
Correct |
139 ms |
4184 KB |
Output is correct |
10 |
Correct |
69 ms |
4408 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
14 ms |
4036 KB |
Output is correct |
13 |
Correct |
14 ms |
3932 KB |
Output is correct |
14 |
Correct |
14 ms |
3932 KB |
Output is correct |
15 |
Correct |
70 ms |
4188 KB |
Output is correct |
16 |
Correct |
69 ms |
4188 KB |
Output is correct |
17 |
Correct |
71 ms |
4188 KB |
Output is correct |
18 |
Correct |
146 ms |
4184 KB |
Output is correct |
19 |
Correct |
153 ms |
4408 KB |
Output is correct |
20 |
Correct |
139 ms |
4184 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
460 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
344 KB |
Output is correct |
13 |
Correct |
0 ms |
460 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
460 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
344 KB |
Output is correct |
13 |
Correct |
0 ms |
460 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
460 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
600 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
344 KB |
Output is correct |
32 |
Correct |
0 ms |
344 KB |
Output is correct |
33 |
Correct |
0 ms |
344 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
1 ms |
348 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
1 ms |
472 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
460 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
344 KB |
Output is correct |
13 |
Correct |
0 ms |
460 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
460 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
600 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
344 KB |
Output is correct |
32 |
Correct |
0 ms |
344 KB |
Output is correct |
33 |
Correct |
0 ms |
344 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
1 ms |
348 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
1 ms |
472 KB |
Output is correct |
41 |
Correct |
1 ms |
2396 KB |
Output is correct |
42 |
Correct |
1 ms |
2396 KB |
Output is correct |
43 |
Correct |
1 ms |
2396 KB |
Output is correct |
44 |
Correct |
1 ms |
2396 KB |
Output is correct |
45 |
Correct |
1 ms |
2396 KB |
Output is correct |
46 |
Correct |
1 ms |
2512 KB |
Output is correct |
47 |
Correct |
1 ms |
2392 KB |
Output is correct |
48 |
Correct |
1 ms |
2396 KB |
Output is correct |
49 |
Correct |
1 ms |
2396 KB |
Output is correct |
50 |
Correct |
1 ms |
2396 KB |
Output is correct |
51 |
Correct |
2 ms |
2652 KB |
Output is correct |
52 |
Correct |
2 ms |
2396 KB |
Output is correct |
53 |
Correct |
1 ms |
2652 KB |
Output is correct |
54 |
Correct |
1 ms |
2396 KB |
Output is correct |
55 |
Correct |
1 ms |
2396 KB |
Output is correct |
56 |
Correct |
1 ms |
2396 KB |
Output is correct |
57 |
Correct |
1 ms |
2396 KB |
Output is correct |
58 |
Correct |
1 ms |
2396 KB |
Output is correct |
59 |
Correct |
2 ms |
2396 KB |
Output is correct |
60 |
Correct |
1 ms |
2396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
149 ms |
4408 KB |
Output is correct |
2 |
Correct |
165 ms |
4416 KB |
Output is correct |
3 |
Correct |
141 ms |
4184 KB |
Output is correct |
4 |
Correct |
143 ms |
4412 KB |
Output is correct |
5 |
Correct |
167 ms |
4184 KB |
Output is correct |
6 |
Correct |
139 ms |
4300 KB |
Output is correct |
7 |
Correct |
142 ms |
4408 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
3 ms |
3676 KB |
Output is correct |
6 |
Correct |
11 ms |
3932 KB |
Output is correct |
7 |
Correct |
38 ms |
4188 KB |
Output is correct |
8 |
Correct |
83 ms |
4188 KB |
Output is correct |
9 |
Correct |
139 ms |
4184 KB |
Output is correct |
10 |
Correct |
69 ms |
4408 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
14 ms |
4036 KB |
Output is correct |
13 |
Correct |
14 ms |
3932 KB |
Output is correct |
14 |
Correct |
14 ms |
3932 KB |
Output is correct |
15 |
Correct |
70 ms |
4188 KB |
Output is correct |
16 |
Correct |
69 ms |
4188 KB |
Output is correct |
17 |
Correct |
71 ms |
4188 KB |
Output is correct |
18 |
Correct |
146 ms |
4184 KB |
Output is correct |
19 |
Correct |
153 ms |
4408 KB |
Output is correct |
20 |
Correct |
139 ms |
4184 KB |
Output is correct |
21 |
Correct |
1 ms |
344 KB |
Output is correct |
22 |
Correct |
1 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
460 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
344 KB |
Output is correct |
33 |
Correct |
0 ms |
460 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
0 ms |
348 KB |
Output is correct |
43 |
Correct |
0 ms |
460 KB |
Output is correct |
44 |
Correct |
0 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
0 ms |
600 KB |
Output is correct |
48 |
Correct |
0 ms |
348 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
348 KB |
Output is correct |
51 |
Correct |
0 ms |
344 KB |
Output is correct |
52 |
Correct |
0 ms |
344 KB |
Output is correct |
53 |
Correct |
0 ms |
344 KB |
Output is correct |
54 |
Correct |
0 ms |
348 KB |
Output is correct |
55 |
Correct |
0 ms |
348 KB |
Output is correct |
56 |
Correct |
0 ms |
348 KB |
Output is correct |
57 |
Correct |
1 ms |
348 KB |
Output is correct |
58 |
Correct |
1 ms |
348 KB |
Output is correct |
59 |
Correct |
0 ms |
348 KB |
Output is correct |
60 |
Correct |
1 ms |
472 KB |
Output is correct |
61 |
Correct |
1 ms |
2396 KB |
Output is correct |
62 |
Correct |
1 ms |
2396 KB |
Output is correct |
63 |
Correct |
1 ms |
2396 KB |
Output is correct |
64 |
Correct |
1 ms |
2396 KB |
Output is correct |
65 |
Correct |
1 ms |
2396 KB |
Output is correct |
66 |
Correct |
1 ms |
2512 KB |
Output is correct |
67 |
Correct |
1 ms |
2392 KB |
Output is correct |
68 |
Correct |
1 ms |
2396 KB |
Output is correct |
69 |
Correct |
1 ms |
2396 KB |
Output is correct |
70 |
Correct |
1 ms |
2396 KB |
Output is correct |
71 |
Correct |
2 ms |
2652 KB |
Output is correct |
72 |
Correct |
2 ms |
2396 KB |
Output is correct |
73 |
Correct |
1 ms |
2652 KB |
Output is correct |
74 |
Correct |
1 ms |
2396 KB |
Output is correct |
75 |
Correct |
1 ms |
2396 KB |
Output is correct |
76 |
Correct |
1 ms |
2396 KB |
Output is correct |
77 |
Correct |
1 ms |
2396 KB |
Output is correct |
78 |
Correct |
1 ms |
2396 KB |
Output is correct |
79 |
Correct |
2 ms |
2396 KB |
Output is correct |
80 |
Correct |
1 ms |
2396 KB |
Output is correct |
81 |
Correct |
149 ms |
4408 KB |
Output is correct |
82 |
Correct |
165 ms |
4416 KB |
Output is correct |
83 |
Correct |
141 ms |
4184 KB |
Output is correct |
84 |
Correct |
143 ms |
4412 KB |
Output is correct |
85 |
Correct |
167 ms |
4184 KB |
Output is correct |
86 |
Correct |
139 ms |
4300 KB |
Output is correct |
87 |
Correct |
142 ms |
4408 KB |
Output is correct |
88 |
Correct |
4 ms |
3672 KB |
Output is correct |
89 |
Correct |
3 ms |
3676 KB |
Output is correct |
90 |
Correct |
10 ms |
3932 KB |
Output is correct |
91 |
Correct |
11 ms |
3932 KB |
Output is correct |
92 |
Correct |
36 ms |
4188 KB |
Output is correct |
93 |
Correct |
37 ms |
4188 KB |
Output is correct |
94 |
Correct |
81 ms |
4412 KB |
Output is correct |
95 |
Correct |
91 ms |
4440 KB |
Output is correct |
96 |
Correct |
114 ms |
4404 KB |
Output is correct |
97 |
Correct |
113 ms |
4184 KB |
Output is correct |
98 |
Correct |
78 ms |
4188 KB |
Output is correct |
99 |
Correct |
79 ms |
4412 KB |
Output is correct |
100 |
Correct |
70 ms |
4188 KB |
Output is correct |
101 |
Correct |
69 ms |
4184 KB |
Output is correct |
102 |
Correct |
70 ms |
4412 KB |
Output is correct |
103 |
Correct |
70 ms |
4188 KB |
Output is correct |
104 |
Correct |
71 ms |
4188 KB |
Output is correct |
105 |
Correct |
71 ms |
4188 KB |
Output is correct |