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Submission #305060

# Submission time Handle Problem Language Result Execution time Memory
305060 2020-09-22T13:47:46 Z luciocf Feast (NOI19_feast) C++14
100 / 100
 199 ms 11600 KB 
#include <bits/stdc++.h>

#define ff first
#define ss second

using namespace std;

typedef long long ll;
typedef pair<ll, int> pii;

const int maxn = 3e5+10;
const ll inf = 6e14+10;

int n;
int a[maxn];

ll pref[maxn];

pii dp[maxn];

int qtd(ll c)
{	
	pii mx = {0, 0};

	for (int i = 1; i <= n; i++)
	{
		mx = max(mx, {dp[i-1].ff - pref[i-1], dp[i-1].ss});

		dp[i] = max(dp[i-1], {pref[i] + mx.ff - c, mx.ss+1});
	}

	return dp[n].ss;
}

int main(void)
{
	int k;
	scanf("%d %d", &n, &k);

	for (int i = 1; i <= n; i++)
	{
		scanf("%d", &a[i]);

		pref[i] = pref[i-1]+1ll*a[i];
	}

	ll ini = 0, fim = inf, best = inf;

	while (ini <= fim)
	{
		ll mid = (ini+fim)/2ll;

		if (qtd(mid) > k) ini = mid+1;
		else best = mid, fim = mid-1;
	}

	qtd(best);

	printf("%lld\n", dp[n].ff + 1ll*dp[n].ss*best);
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |  scanf("%d %d", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~~
feast.cpp:42:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 8316 KB Output is correct
2 Correct 105 ms 11344 KB Output is correct
3 Correct 109 ms 11384 KB Output is correct
4 Correct 110 ms 11328 KB Output is correct
5 Correct 109 ms 11256 KB Output is correct
6 Correct 107 ms 11264 KB Output is correct
7 Correct 106 ms 11128 KB Output is correct
8 Correct 109 ms 11384 KB Output is correct
9 Correct 108 ms 11128 KB Output is correct
10 Correct 111 ms 11384 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 94 ms 8388 KB Output is correct
2 Correct 100 ms 8568 KB Output is correct
3 Correct 91 ms 8440 KB Output is correct
4 Correct 90 ms 8440 KB Output is correct
5 Correct 103 ms 11128 KB Output is correct
6 Correct 90 ms 9464 KB Output is correct
7 Correct 92 ms 9720 KB Output is correct
8 Correct 108 ms 11384 KB Output is correct
9 Correct 104 ms 11128 KB Output is correct
10 Correct 93 ms 9592 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 8440 KB Output is correct
2 Correct 139 ms 8440 KB Output is correct
3 Correct 138 ms 8440 KB Output is correct
4 Correct 136 ms 8440 KB Output is correct
5 Correct 137 ms 8472 KB Output is correct
6 Correct 143 ms 8440 KB Output is correct
7 Correct 140 ms 8524 KB Output is correct
8 Correct 140 ms 8440 KB Output is correct
9 Correct 142 ms 8568 KB Output is correct
10 Correct 139 ms 8440 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 2 ms 384 KB Output is correct
23 Correct 2 ms 384 KB Output is correct
24 Correct 2 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 2 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 8316 KB Output is correct
2 Correct 105 ms 11344 KB Output is correct
3 Correct 109 ms 11384 KB Output is correct
4 Correct 110 ms 11328 KB Output is correct
5 Correct 109 ms 11256 KB Output is correct
6 Correct 107 ms 11264 KB Output is correct
7 Correct 106 ms 11128 KB Output is correct
8 Correct 109 ms 11384 KB Output is correct
9 Correct 108 ms 11128 KB Output is correct
10 Correct 111 ms 11384 KB Output is correct
11 Correct 94 ms 8388 KB Output is correct
12 Correct 100 ms 8568 KB Output is correct
13 Correct 91 ms 8440 KB Output is correct
14 Correct 90 ms 8440 KB Output is correct
15 Correct 103 ms 11128 KB Output is correct
16 Correct 90 ms 9464 KB Output is correct
17 Correct 92 ms 9720 KB Output is correct
18 Correct 108 ms 11384 KB Output is correct
19 Correct 104 ms 11128 KB Output is correct
20 Correct 93 ms 9592 KB Output is correct
21 Correct 140 ms 8440 KB Output is correct
22 Correct 139 ms 8440 KB Output is correct
23 Correct 138 ms 8440 KB Output is correct
24 Correct 136 ms 8440 KB Output is correct
25 Correct 137 ms 8472 KB Output is correct
26 Correct 143 ms 8440 KB Output is correct
27 Correct 140 ms 8524 KB Output is correct
28 Correct 140 ms 8440 KB Output is correct
29 Correct 142 ms 8568 KB Output is correct
30 Correct 139 ms 8440 KB Output is correct
31 Correct 1 ms 512 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 1 ms 384 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 0 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 1 ms 512 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 1 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 2 ms 384 KB Output is correct
53 Correct 2 ms 384 KB Output is correct
54 Correct 2 ms 384 KB Output is correct
55 Correct 2 ms 384 KB Output is correct
56 Correct 2 ms 384 KB Output is correct
57 Correct 1 ms 384 KB Output is correct
58 Correct 1 ms 384 KB Output is correct
59 Correct 1 ms 384 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 186 ms 11256 KB Output is correct
62 Correct 185 ms 11600 KB Output is correct
63 Correct 153 ms 11256 KB Output is correct
64 Correct 190 ms 11512 KB Output is correct
65 Correct 192 ms 11512 KB Output is correct
66 Correct 199 ms 11512 KB Output is correct
67 Correct 186 ms 11256 KB Output is correct
68 Correct 142 ms 11512 KB Output is correct
69 Correct 139 ms 11388 KB Output is correct
70 Correct 136 ms 11256 KB Output is correct