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Submission #305081

# Submission time Handle Problem Language Result Execution time Memory
305081 2020-09-22T14:27:19 Z luciocf Feast (NOI19_feast) C++14
100 / 100
 277 ms 8824 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)
		{
			best = mid;
			break;
		}

		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 148 ms 8440 KB Output is correct
2 Correct 148 ms 8568 KB Output is correct
3 Correct 151 ms 8568 KB Output is correct
4 Correct 151 ms 8440 KB Output is correct
5 Correct 153 ms 8440 KB Output is correct
6 Correct 151 ms 8312 KB Output is correct
7 Correct 150 ms 8312 KB Output is correct
8 Correct 151 ms 8696 KB Output is correct
9 Correct 147 ms 8440 KB Output is correct
10 Correct 151 ms 8440 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 8312 KB Output is correct
2 Correct 94 ms 8568 KB Output is correct
3 Correct 87 ms 8312 KB Output is correct
4 Correct 138 ms 8440 KB Output is correct
5 Correct 68 ms 8312 KB Output is correct
6 Correct 86 ms 8312 KB Output is correct
7 Correct 138 ms 8824 KB Output is correct
8 Correct 68 ms 8568 KB Output is correct
9 Correct 67 ms 8204 KB Output is correct
10 Correct 137 ms 8440 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 8440 KB Output is correct
2 Correct 124 ms 8312 KB Output is correct
3 Correct 118 ms 8472 KB Output is correct
4 Correct 113 ms 8312 KB Output is correct
5 Correct 118 ms 8440 KB Output is correct
6 Correct 119 ms 8568 KB Output is correct
7 Correct 125 ms 8544 KB Output is correct
8 Correct 117 ms 8568 KB Output is correct
9 Correct 114 ms 8568 KB Output is correct
10 Correct 127 ms 8440 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 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 0 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 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 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 2 ms 416 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 1 ms 384 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 1 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 148 ms 8440 KB Output is correct
2 Correct 148 ms 8568 KB Output is correct
3 Correct 151 ms 8568 KB Output is correct
4 Correct 151 ms 8440 KB Output is correct
5 Correct 153 ms 8440 KB Output is correct
6 Correct 151 ms 8312 KB Output is correct
7 Correct 150 ms 8312 KB Output is correct
8 Correct 151 ms 8696 KB Output is correct
9 Correct 147 ms 8440 KB Output is correct
10 Correct 151 ms 8440 KB Output is correct
11 Correct 103 ms 8312 KB Output is correct
12 Correct 94 ms 8568 KB Output is correct
13 Correct 87 ms 8312 KB Output is correct
14 Correct 138 ms 8440 KB Output is correct
15 Correct 68 ms 8312 KB Output is correct
16 Correct 86 ms 8312 KB Output is correct
17 Correct 138 ms 8824 KB Output is correct
18 Correct 68 ms 8568 KB Output is correct
19 Correct 67 ms 8204 KB Output is correct
20 Correct 137 ms 8440 KB Output is correct
21 Correct 119 ms 8440 KB Output is correct
22 Correct 124 ms 8312 KB Output is correct
23 Correct 118 ms 8472 KB Output is correct
24 Correct 113 ms 8312 KB Output is correct
25 Correct 118 ms 8440 KB Output is correct
26 Correct 119 ms 8568 KB Output is correct
27 Correct 125 ms 8544 KB Output is correct
28 Correct 117 ms 8568 KB Output is correct
29 Correct 114 ms 8568 KB Output is correct
30 Correct 127 ms 8440 KB Output is correct
31 Correct 0 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 0 ms 384 KB Output is correct
38 Correct 0 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 0 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 2 ms 416 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 1 ms 384 KB Output is correct
57 Correct 2 ms 384 KB Output is correct
58 Correct 1 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 217 ms 8312 KB Output is correct
62 Correct 277 ms 8572 KB Output is correct
63 Correct 182 ms 8440 KB Output is correct
64 Correct 240 ms 8440 KB Output is correct
65 Correct 197 ms 8440 KB Output is correct
66 Correct 222 ms 8500 KB Output is correct
67 Correct 211 ms 8448 KB Output is correct
68 Correct 146 ms 8440 KB Output is correct
69 Correct 143 ms 8568 KB Output is correct
70 Correct 121 ms 8312 KB Output is correct