#include <bits/stdc++.h>
using namespace std;
const int N = 300000;
const long long INF = (long long) 300000 * 1000000000;
int n, k, a[N + 1];
pair<long double, int> dp[N + 1][2];
bool check(long double penalty) {
dp[0][0] = {0, 0}, dp[0][1] = {-INF, 0};
for (int i = 1; i <= n; ++i) {
dp[i][0] = max(dp[i - 1][0], dp[i - 1][1]);
dp[i][1] = max(make_pair(dp[i - 1][1].first + a[i], dp[i - 1][1].second),
make_pair(dp[i - 1][0].first + a[i] - penalty, dp[i - 1][0].second + 1));
}
return max(dp[n][0], dp[n][1]).second >= k;
};
int main() {
scanf("%d%d", &n, &k);
for (int i = 1; i <= n; ++i)
scanf("%d", a + i);
long double lower = 0, upper = INF;
for (int it = 0; it < 100; ++it) {
long double mid = (lower + upper) / 2;
if (check(mid)) {
lower = mid;
} else {
upper = mid;
}
}
long double penalty = lower;
check(penalty);
printf("%lld\n", (long long) round(penalty * k + max(dp[n][0], dp[n][1]).first));
}
Compilation message
feast.cpp: In function 'int main()':
feast.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
21 | scanf("%d%d", &n, &k);
| ~~~~~^~~~~~~~~~~~~~~~
feast.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
23 | scanf("%d", a + i);
| ~~~~~^~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
455 ms |
22416 KB |
Output is correct |
| 2 |
Correct |
487 ms |
22836 KB |
Output is correct |
| 3 |
Correct |
482 ms |
23016 KB |
Output is correct |
| 4 |
Correct |
455 ms |
22852 KB |
Output is correct |
| 5 |
Correct |
474 ms |
22812 KB |
Output is correct |
| 6 |
Correct |
443 ms |
22344 KB |
Output is correct |
| 7 |
Correct |
447 ms |
22344 KB |
Output is correct |
| 8 |
Correct |
470 ms |
23000 KB |
Output is correct |
| 9 |
Correct |
466 ms |
22424 KB |
Output is correct |
| 10 |
Correct |
474 ms |
22596 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
446 ms |
20872 KB |
Output is correct |
| 2 |
Correct |
454 ms |
21220 KB |
Output is correct |
| 3 |
Correct |
467 ms |
20760 KB |
Output is correct |
| 4 |
Correct |
455 ms |
21028 KB |
Output is correct |
| 5 |
Correct |
459 ms |
22448 KB |
Output is correct |
| 6 |
Correct |
442 ms |
20932 KB |
Output is correct |
| 7 |
Correct |
483 ms |
21372 KB |
Output is correct |
| 8 |
Correct |
485 ms |
22972 KB |
Output is correct |
| 9 |
Correct |
457 ms |
22312 KB |
Output is correct |
| 10 |
Correct |
462 ms |
21284 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
534 ms |
22968 KB |
Output is correct |
| 2 |
Correct |
528 ms |
22740 KB |
Output is correct |
| 3 |
Correct |
545 ms |
23048 KB |
Output is correct |
| 4 |
Correct |
536 ms |
22852 KB |
Output is correct |
| 5 |
Correct |
515 ms |
22852 KB |
Output is correct |
| 6 |
Correct |
533 ms |
23100 KB |
Output is correct |
| 7 |
Correct |
536 ms |
23188 KB |
Output is correct |
| 8 |
Correct |
523 ms |
23000 KB |
Output is correct |
| 9 |
Correct |
533 ms |
23320 KB |
Output is correct |
| 10 |
Correct |
525 ms |
23192 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Correct |
1 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
204 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Correct |
1 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
204 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
204 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
2 ms |
204 KB |
Output is correct |
| 16 |
Correct |
1 ms |
204 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
204 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Correct |
1 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
204 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
204 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
2 ms |
204 KB |
Output is correct |
| 16 |
Correct |
1 ms |
204 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
204 KB |
Output is correct |
| 21 |
Correct |
4 ms |
460 KB |
Output is correct |
| 22 |
Correct |
5 ms |
332 KB |
Output is correct |
| 23 |
Correct |
5 ms |
332 KB |
Output is correct |
| 24 |
Correct |
5 ms |
440 KB |
Output is correct |
| 25 |
Correct |
4 ms |
464 KB |
Output is correct |
| 26 |
Correct |
4 ms |
460 KB |
Output is correct |
| 27 |
Correct |
6 ms |
464 KB |
Output is correct |
| 28 |
Correct |
4 ms |
444 KB |
Output is correct |
| 29 |
Correct |
6 ms |
460 KB |
Output is correct |
| 30 |
Correct |
5 ms |
448 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
455 ms |
22416 KB |
Output is correct |
| 2 |
Correct |
487 ms |
22836 KB |
Output is correct |
| 3 |
Correct |
482 ms |
23016 KB |
Output is correct |
| 4 |
Correct |
455 ms |
22852 KB |
Output is correct |
| 5 |
Correct |
474 ms |
22812 KB |
Output is correct |
| 6 |
Correct |
443 ms |
22344 KB |
Output is correct |
| 7 |
Correct |
447 ms |
22344 KB |
Output is correct |
| 8 |
Correct |
470 ms |
23000 KB |
Output is correct |
| 9 |
Correct |
466 ms |
22424 KB |
Output is correct |
| 10 |
Correct |
474 ms |
22596 KB |
Output is correct |
| 11 |
Correct |
446 ms |
20872 KB |
Output is correct |
| 12 |
Correct |
454 ms |
21220 KB |
Output is correct |
| 13 |
Correct |
467 ms |
20760 KB |
Output is correct |
| 14 |
Correct |
455 ms |
21028 KB |
Output is correct |
| 15 |
Correct |
459 ms |
22448 KB |
Output is correct |
| 16 |
Correct |
442 ms |
20932 KB |
Output is correct |
| 17 |
Correct |
483 ms |
21372 KB |
Output is correct |
| 18 |
Correct |
485 ms |
22972 KB |
Output is correct |
| 19 |
Correct |
457 ms |
22312 KB |
Output is correct |
| 20 |
Correct |
462 ms |
21284 KB |
Output is correct |
| 21 |
Correct |
534 ms |
22968 KB |
Output is correct |
| 22 |
Correct |
528 ms |
22740 KB |
Output is correct |
| 23 |
Correct |
545 ms |
23048 KB |
Output is correct |
| 24 |
Correct |
536 ms |
22852 KB |
Output is correct |
| 25 |
Correct |
515 ms |
22852 KB |
Output is correct |
| 26 |
Correct |
533 ms |
23100 KB |
Output is correct |
| 27 |
Correct |
536 ms |
23188 KB |
Output is correct |
| 28 |
Correct |
523 ms |
23000 KB |
Output is correct |
| 29 |
Correct |
533 ms |
23320 KB |
Output is correct |
| 30 |
Correct |
525 ms |
23192 KB |
Output is correct |
| 31 |
Correct |
1 ms |
204 KB |
Output is correct |
| 32 |
Correct |
1 ms |
204 KB |
Output is correct |
| 33 |
Correct |
1 ms |
204 KB |
Output is correct |
| 34 |
Correct |
1 ms |
204 KB |
Output is correct |
| 35 |
Correct |
1 ms |
204 KB |
Output is correct |
| 36 |
Correct |
1 ms |
204 KB |
Output is correct |
| 37 |
Correct |
1 ms |
204 KB |
Output is correct |
| 38 |
Correct |
1 ms |
204 KB |
Output is correct |
| 39 |
Correct |
1 ms |
204 KB |
Output is correct |
| 40 |
Correct |
1 ms |
204 KB |
Output is correct |
| 41 |
Correct |
1 ms |
332 KB |
Output is correct |
| 42 |
Correct |
1 ms |
204 KB |
Output is correct |
| 43 |
Correct |
1 ms |
332 KB |
Output is correct |
| 44 |
Correct |
1 ms |
332 KB |
Output is correct |
| 45 |
Correct |
2 ms |
204 KB |
Output is correct |
| 46 |
Correct |
1 ms |
204 KB |
Output is correct |
| 47 |
Correct |
1 ms |
332 KB |
Output is correct |
| 48 |
Correct |
1 ms |
332 KB |
Output is correct |
| 49 |
Correct |
1 ms |
332 KB |
Output is correct |
| 50 |
Correct |
1 ms |
204 KB |
Output is correct |
| 51 |
Correct |
4 ms |
460 KB |
Output is correct |
| 52 |
Correct |
5 ms |
332 KB |
Output is correct |
| 53 |
Correct |
5 ms |
332 KB |
Output is correct |
| 54 |
Correct |
5 ms |
440 KB |
Output is correct |
| 55 |
Correct |
4 ms |
464 KB |
Output is correct |
| 56 |
Correct |
4 ms |
460 KB |
Output is correct |
| 57 |
Correct |
6 ms |
464 KB |
Output is correct |
| 58 |
Correct |
4 ms |
444 KB |
Output is correct |
| 59 |
Correct |
6 ms |
460 KB |
Output is correct |
| 60 |
Correct |
5 ms |
448 KB |
Output is correct |
| 61 |
Correct |
691 ms |
22596 KB |
Output is correct |
| 62 |
Correct |
678 ms |
23312 KB |
Output is correct |
| 63 |
Correct |
578 ms |
22648 KB |
Output is correct |
| 64 |
Correct |
711 ms |
23176 KB |
Output is correct |
| 65 |
Correct |
703 ms |
23104 KB |
Output is correct |
| 66 |
Correct |
686 ms |
23144 KB |
Output is correct |
| 67 |
Correct |
698 ms |
22600 KB |
Output is correct |
| 68 |
Correct |
531 ms |
23124 KB |
Output is correct |
| 69 |
Correct |
538 ms |
22672 KB |
Output is correct |
| 70 |
Correct |
506 ms |
22468 KB |
Output is correct |
