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Submission #305254

# Submission time Handle Problem Language Result Execution time Memory
305254 2020-09-22T19:45:48 Z luciocf Feast (NOI19_feast) C++14
100 / 100
 175 ms 8824 KB 
#include <bits/stdc++.h>
 
#define ff first
#define ss second
 
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
 
const int maxn = 5e5+10;
const ll inf = 6e14+10;
 
int n;
int a[maxn];
 
ll pref[maxn];
 
ll dp[maxn];
pii range[maxn];
 
void get(ll c)
{	
	ll mx = 0;
	int mx_l = 0, mx_r = 0;
 
	for (int i = 1; i <= n; i++)
	{ 	
		ll v = pref[i] + mx - c;

 		dp[i] = dp[i-1], range[i] = range[i-1];

 		if (v > dp[i])
 		{
 			dp[i] = v;
 			range[i] = {mx_l+1, mx_r+1};
 		}
 		else if (v == dp[i])
 		{
 			range[i].ff = min(range[i].ff, mx_l+1);
 			range[i].ss = max(range[i].ss, mx_r+1);
 		}

 		v = dp[i] - pref[i];

 		if (v > mx)
 		{
 			mx = v;
 			mx_l = range[i].ff, mx_r = range[i].ss;
 		}
 		else
 		{
 			mx_l = min(mx_l, range[i].ff);
 			mx_r = max(mx_r, range[i].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;

		get(mid);
 
		if (range[n].ff > k) ini = mid+1;
		else best = mid, fim = mid-1;
	}
 
	get(best);

	int qtd = min(k, range[n].ss);

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

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:62:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   62 |  scanf("%d %d", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~~
feast.cpp:66:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   66 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 8316 KB Output is correct
2 Correct 123 ms 8568 KB Output is correct
3 Correct 124 ms 8696 KB Output is correct
4 Correct 124 ms 8668 KB Output is correct
5 Correct 121 ms 8568 KB Output is correct
6 Correct 120 ms 8440 KB Output is correct
7 Correct 119 ms 8364 KB Output is correct
8 Correct 122 ms 8652 KB Output is correct
9 Correct 120 ms 8440 KB Output is correct
10 Correct 124 ms 8592 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 8440 KB Output is correct
2 Correct 90 ms 8696 KB Output is correct
3 Correct 92 ms 8696 KB Output is correct
4 Correct 93 ms 8568 KB Output is correct
5 Correct 121 ms 8440 KB Output is correct
6 Correct 94 ms 8440 KB Output is correct
7 Correct 99 ms 8696 KB Output is correct
8 Correct 124 ms 8568 KB Output is correct
9 Correct 120 ms 8440 KB Output is correct
10 Correct 98 ms 8696 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 132 ms 8568 KB Output is correct
2 Correct 128 ms 8568 KB Output is correct
3 Correct 134 ms 8696 KB Output is correct
4 Correct 129 ms 8568 KB Output is correct
5 Correct 127 ms 8568 KB Output is correct
6 Correct 134 ms 8700 KB Output is correct
7 Correct 134 ms 8696 KB Output is correct
8 Correct 128 ms 8568 KB Output is correct
9 Correct 131 ms 8696 KB Output is correct
10 Correct 129 ms 8696 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 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 0 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 1 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 384 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 0 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 1 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 384 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 384 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 0 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 1 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 384 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 512 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 2 ms 384 KB Output is correct
29 Correct 2 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 119 ms 8316 KB Output is correct
2 Correct 123 ms 8568 KB Output is correct
3 Correct 124 ms 8696 KB Output is correct
4 Correct 124 ms 8668 KB Output is correct
5 Correct 121 ms 8568 KB Output is correct
6 Correct 120 ms 8440 KB Output is correct
7 Correct 119 ms 8364 KB Output is correct
8 Correct 122 ms 8652 KB Output is correct
9 Correct 120 ms 8440 KB Output is correct
10 Correct 124 ms 8592 KB Output is correct
11 Correct 85 ms 8440 KB Output is correct
12 Correct 90 ms 8696 KB Output is correct
13 Correct 92 ms 8696 KB Output is correct
14 Correct 93 ms 8568 KB Output is correct
15 Correct 121 ms 8440 KB Output is correct
16 Correct 94 ms 8440 KB Output is correct
17 Correct 99 ms 8696 KB Output is correct
18 Correct 124 ms 8568 KB Output is correct
19 Correct 120 ms 8440 KB Output is correct
20 Correct 98 ms 8696 KB Output is correct
21 Correct 132 ms 8568 KB Output is correct
22 Correct 128 ms 8568 KB Output is correct
23 Correct 134 ms 8696 KB Output is correct
24 Correct 129 ms 8568 KB Output is correct
25 Correct 127 ms 8568 KB Output is correct
26 Correct 134 ms 8700 KB Output is correct
27 Correct 134 ms 8696 KB Output is correct
28 Correct 128 ms 8568 KB Output is correct
29 Correct 131 ms 8696 KB Output is correct
30 Correct 129 ms 8696 KB Output is correct
31 Correct 1 ms 384 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 0 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 1 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 384 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 512 KB Output is correct
55 Correct 1 ms 384 KB Output is correct
56 Correct 1 ms 384 KB Output is correct
57 Correct 2 ms 384 KB Output is correct
58 Correct 2 ms 384 KB Output is correct
59 Correct 2 ms 384 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 165 ms 8440 KB Output is correct
62 Correct 164 ms 8824 KB Output is correct
63 Correct 143 ms 8568 KB Output is correct
64 Correct 169 ms 8748 KB Output is correct
65 Correct 175 ms 8696 KB Output is correct
66 Correct 167 ms 8568 KB Output is correct
67 Correct 169 ms 8520 KB Output is correct
68 Correct 132 ms 8568 KB Output is correct
69 Correct 128 ms 8440 KB Output is correct
70 Correct 129 ms 8480 KB Output is correct