#include<bits/stdc++.h>
using namespace std;
int n,k;
const long double sz=1e-6;
long long a[400000];
long long m[400000];
long long mincnt=0;
long double score=0;
long double get(int ind) {
if(ind<0)return 0;
else return m[ind];
}
void calc(long double lam) {
long double bestscore=0;
long long bestcnt=0;
long double bestnxt=-lam;
long long nxtcnt=0;
for(int i=0;i<n;i++) {
if(bestscore-lam-get(i-1)>bestnxt ||
(bestscore-lam-get(i-1)==bestnxt && nxtcnt>bestcnt)) {
bestnxt=bestscore-get(i-1)-lam;
nxtcnt=bestcnt;
}
if(bestnxt+get(i)>bestscore || (bestnxt+get(i)==bestscore && nxtcnt+1<bestcnt)) {
bestscore=bestnxt+get(i);
bestcnt=nxtcnt+1;
}
}
mincnt=bestcnt;
score=bestscore;
}
int main() {
ios_base::sync_with_stdio(0);cin.tie(0);
cin>>n>>k;
for(int i=0;i<n;i++)cin>>a[i];
m[0]=a[0];for(int i=1;i<n;i++)m[i]=m[i-1]+a[i];
long double l=0,r=1e16;
while(l+sz<r) {
long double mid=(l+r)/2.0;
calc(mid);
if(mincnt<=k)r=mid;
else l=mid;
}
calc(r);
cout<<(long long)(round(score+k*r))<<endl;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
84 ms |
4860 KB |
Output is correct |
| 2 |
Correct |
89 ms |
4956 KB |
Output is correct |
| 3 |
Correct |
96 ms |
4936 KB |
Output is correct |
| 4 |
Correct |
90 ms |
4984 KB |
Output is correct |
| 5 |
Correct |
89 ms |
4948 KB |
Output is correct |
| 6 |
Correct |
87 ms |
4872 KB |
Output is correct |
| 7 |
Correct |
88 ms |
4780 KB |
Output is correct |
| 8 |
Correct |
107 ms |
4924 KB |
Output is correct |
| 9 |
Correct |
84 ms |
4788 KB |
Output is correct |
| 10 |
Correct |
91 ms |
4924 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
82 ms |
4896 KB |
Output is correct |
| 2 |
Correct |
75 ms |
4908 KB |
Output is correct |
| 3 |
Correct |
69 ms |
4816 KB |
Output is correct |
| 4 |
Correct |
75 ms |
4928 KB |
Output is correct |
| 5 |
Correct |
81 ms |
4868 KB |
Output is correct |
| 6 |
Correct |
78 ms |
4888 KB |
Output is correct |
| 7 |
Correct |
97 ms |
4952 KB |
Output is correct |
| 8 |
Correct |
81 ms |
4880 KB |
Output is correct |
| 9 |
Correct |
81 ms |
4812 KB |
Output is correct |
| 10 |
Correct |
73 ms |
4984 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
141 ms |
4956 KB |
Output is correct |
| 2 |
Correct |
160 ms |
4900 KB |
Output is correct |
| 3 |
Correct |
133 ms |
4920 KB |
Output is correct |
| 4 |
Correct |
129 ms |
4900 KB |
Output is correct |
| 5 |
Correct |
166 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
184 ms |
4972 KB |
Output is correct |
| 7 |
Correct |
149 ms |
4984 KB |
Output is correct |
| 8 |
Correct |
161 ms |
4904 KB |
Output is correct |
| 9 |
Correct |
157 ms |
5052 KB |
Output is correct |
| 10 |
Correct |
149 ms |
4948 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
2 ms |
340 KB |
Output is correct |
| 22 |
Correct |
2 ms |
368 KB |
Output is correct |
| 23 |
Correct |
2 ms |
340 KB |
Output is correct |
| 24 |
Correct |
2 ms |
340 KB |
Output is correct |
| 25 |
Correct |
2 ms |
340 KB |
Output is correct |
| 26 |
Correct |
2 ms |
340 KB |
Output is correct |
| 27 |
Correct |
3 ms |
340 KB |
Output is correct |
| 28 |
Correct |
2 ms |
340 KB |
Output is correct |
| 29 |
Correct |
2 ms |
336 KB |
Output is correct |
| 30 |
Correct |
2 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
84 ms |
4860 KB |
Output is correct |
| 2 |
Correct |
89 ms |
4956 KB |
Output is correct |
| 3 |
Correct |
96 ms |
4936 KB |
Output is correct |
| 4 |
Correct |
90 ms |
4984 KB |
Output is correct |
| 5 |
Correct |
89 ms |
4948 KB |
Output is correct |
| 6 |
Correct |
87 ms |
4872 KB |
Output is correct |
| 7 |
Correct |
88 ms |
4780 KB |
Output is correct |
| 8 |
Correct |
107 ms |
4924 KB |
Output is correct |
| 9 |
Correct |
84 ms |
4788 KB |
Output is correct |
| 10 |
Correct |
91 ms |
4924 KB |
Output is correct |
| 11 |
Correct |
82 ms |
4896 KB |
Output is correct |
| 12 |
Correct |
75 ms |
4908 KB |
Output is correct |
| 13 |
Correct |
69 ms |
4816 KB |
Output is correct |
| 14 |
Correct |
75 ms |
4928 KB |
Output is correct |
| 15 |
Correct |
81 ms |
4868 KB |
Output is correct |
| 16 |
Correct |
78 ms |
4888 KB |
Output is correct |
| 17 |
Correct |
97 ms |
4952 KB |
Output is correct |
| 18 |
Correct |
81 ms |
4880 KB |
Output is correct |
| 19 |
Correct |
81 ms |
4812 KB |
Output is correct |
| 20 |
Correct |
73 ms |
4984 KB |
Output is correct |
| 21 |
Correct |
141 ms |
4956 KB |
Output is correct |
| 22 |
Correct |
160 ms |
4900 KB |
Output is correct |
| 23 |
Correct |
133 ms |
4920 KB |
Output is correct |
| 24 |
Correct |
129 ms |
4900 KB |
Output is correct |
| 25 |
Correct |
166 ms |
4940 KB |
Output is correct |
| 26 |
Correct |
184 ms |
4972 KB |
Output is correct |
| 27 |
Correct |
149 ms |
4984 KB |
Output is correct |
| 28 |
Correct |
161 ms |
4904 KB |
Output is correct |
| 29 |
Correct |
157 ms |
5052 KB |
Output is correct |
| 30 |
Correct |
149 ms |
4948 KB |
Output is correct |
| 31 |
Correct |
1 ms |
340 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| 33 |
Correct |
0 ms |
212 KB |
Output is correct |
| 34 |
Correct |
1 ms |
212 KB |
Output is correct |
| 35 |
Correct |
1 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
212 KB |
Output is correct |
| 37 |
Correct |
1 ms |
212 KB |
Output is correct |
| 38 |
Correct |
1 ms |
212 KB |
Output is correct |
| 39 |
Correct |
1 ms |
212 KB |
Output is correct |
| 40 |
Correct |
1 ms |
212 KB |
Output is correct |
| 41 |
Correct |
1 ms |
340 KB |
Output is correct |
| 42 |
Correct |
1 ms |
340 KB |
Output is correct |
| 43 |
Correct |
1 ms |
340 KB |
Output is correct |
| 44 |
Correct |
1 ms |
340 KB |
Output is correct |
| 45 |
Correct |
1 ms |
340 KB |
Output is correct |
| 46 |
Correct |
1 ms |
340 KB |
Output is correct |
| 47 |
Correct |
1 ms |
340 KB |
Output is correct |
| 48 |
Correct |
1 ms |
340 KB |
Output is correct |
| 49 |
Correct |
1 ms |
340 KB |
Output is correct |
| 50 |
Correct |
1 ms |
340 KB |
Output is correct |
| 51 |
Correct |
2 ms |
340 KB |
Output is correct |
| 52 |
Correct |
2 ms |
368 KB |
Output is correct |
| 53 |
Correct |
2 ms |
340 KB |
Output is correct |
| 54 |
Correct |
2 ms |
340 KB |
Output is correct |
| 55 |
Correct |
2 ms |
340 KB |
Output is correct |
| 56 |
Correct |
2 ms |
340 KB |
Output is correct |
| 57 |
Correct |
3 ms |
340 KB |
Output is correct |
| 58 |
Correct |
2 ms |
340 KB |
Output is correct |
| 59 |
Correct |
2 ms |
336 KB |
Output is correct |
| 60 |
Correct |
2 ms |
340 KB |
Output is correct |
| 61 |
Correct |
279 ms |
5144 KB |
Output is correct |
| 62 |
Correct |
248 ms |
5264 KB |
Output is correct |
| 63 |
Correct |
207 ms |
5140 KB |
Output is correct |
| 64 |
Correct |
291 ms |
5224 KB |
Output is correct |
| 65 |
Correct |
288 ms |
5232 KB |
Output is correct |
| 66 |
Correct |
271 ms |
5324 KB |
Output is correct |
| 67 |
Correct |
264 ms |
5140 KB |
Output is correct |
| 68 |
Correct |
151 ms |
5300 KB |
Output is correct |
| 69 |
Correct |
139 ms |
5200 KB |
Output is correct |
| 70 |
Correct |
136 ms |
5120 KB |
Output is correct |
