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Submission #1017473

# Submission time Handle Problem Language Result Execution time Memory
1017473 2024-07-09T08:16:37 Z vjudge1 Feast (NOI19_feast) C++14
100 / 100
 112 ms 14012 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define taskname ""
using namespace std;
ll n,k,i,l,r,mid,answer=-1e18,dp[300009][2],a[300009],cnt[300009][2],sum;
pll ans;
pll check(ll v){
        dp[1][0]=0;
        dp[1][1]=a[1]-v;
        cnt[1][0]=0;
        cnt[1][1]=1;
    for(i=2;i<=n;i++){
        if(dp[i-1][1]<dp[i-1][0]){
            dp[i][0]=dp[i-1][0];
            cnt[i][0]=cnt[i-1][0];
        }else{
            dp[i][0]=dp[i-1][1];
            cnt[i][0]=cnt[i-1][1];
        }
        if(dp[i-1][1]+a[i]<dp[i-1][0]+a[i]-v){
            dp[i][1]=dp[i-1][0]+a[i]-v;
            cnt[i][1]=cnt[i-1][0]+1;
        }else{
            dp[i][1]=dp[i-1][1]+a[i];
            cnt[i][1]=cnt[i-1][1];
        }
    }pll res={dp[n][1],cnt[n][1]};
    pll result={dp[n][0],cnt[n][0]};
    res=max(res,result);
    return res;
}
int main() {
	if (fopen(taskname".inp","r")) {
		freopen(taskname".inp","r",stdin);
		freopen(taskname".out","w",stdout);
	}
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
    cin>>n>>k;
    for(i=1;i<=n;i++)
        cin>>a[i];
    l=0;r=1e18;
    while(l<=r){
        mid=(l+r)/2;
        ans=check(mid);
        if(ans.se<=k){
            answer=max(answer,ans.fi+mid*ans.se);
            r=mid-1;
        }else l=mid+1;
    }cout<<answer;
	return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:40:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |   freopen(taskname".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
feast.cpp:41:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |   freopen(taskname".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 13220 KB Output is correct
2 Correct 54 ms 13744 KB Output is correct
3 Correct 64 ms 13964 KB Output is correct
4 Correct 59 ms 13768 KB Output is correct
5 Correct 53 ms 13696 KB Output is correct
6 Correct 55 ms 13144 KB Output is correct
7 Correct 52 ms 13324 KB Output is correct
8 Correct 54 ms 13844 KB Output is correct
9 Correct 59 ms 13384 KB Output is correct
10 Correct 59 ms 13544 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 12480 KB Output is correct
2 Correct 46 ms 12924 KB Output is correct
3 Correct 50 ms 12636 KB Output is correct
4 Correct 50 ms 12824 KB Output is correct
5 Correct 53 ms 13368 KB Output is correct
6 Correct 51 ms 12440 KB Output is correct
7 Correct 49 ms 13172 KB Output is correct
8 Correct 52 ms 13748 KB Output is correct
9 Correct 62 ms 13328 KB Output is correct
10 Correct 47 ms 12856 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 13648 KB Output is correct
2 Correct 89 ms 13560 KB Output is correct
3 Correct 82 ms 13760 KB Output is correct
4 Correct 84 ms 13692 KB Output is correct
5 Correct 82 ms 13644 KB Output is correct
6 Correct 81 ms 13704 KB Output is correct
7 Correct 92 ms 13768 KB Output is correct
8 Correct 79 ms 13808 KB Output is correct
9 Correct 99 ms 13908 KB Output is correct
10 Correct 75 ms 13916 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 508 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 13220 KB Output is correct
2 Correct 54 ms 13744 KB Output is correct
3 Correct 64 ms 13964 KB Output is correct
4 Correct 59 ms 13768 KB Output is correct
5 Correct 53 ms 13696 KB Output is correct
6 Correct 55 ms 13144 KB Output is correct
7 Correct 52 ms 13324 KB Output is correct
8 Correct 54 ms 13844 KB Output is correct
9 Correct 59 ms 13384 KB Output is correct
10 Correct 59 ms 13544 KB Output is correct
11 Correct 46 ms 12480 KB Output is correct
12 Correct 46 ms 12924 KB Output is correct
13 Correct 50 ms 12636 KB Output is correct
14 Correct 50 ms 12824 KB Output is correct
15 Correct 53 ms 13368 KB Output is correct
16 Correct 51 ms 12440 KB Output is correct
17 Correct 49 ms 13172 KB Output is correct
18 Correct 52 ms 13748 KB Output is correct
19 Correct 62 ms 13328 KB Output is correct
20 Correct 47 ms 12856 KB Output is correct
21 Correct 80 ms 13648 KB Output is correct
22 Correct 89 ms 13560 KB Output is correct
23 Correct 82 ms 13760 KB Output is correct
24 Correct 84 ms 13692 KB Output is correct
25 Correct 82 ms 13644 KB Output is correct
26 Correct 81 ms 13704 KB Output is correct
27 Correct 92 ms 13768 KB Output is correct
28 Correct 79 ms 13808 KB Output is correct
29 Correct 99 ms 13908 KB Output is correct
30 Correct 75 ms 13916 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 468 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 344 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 1 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 0 ms 344 KB Output is correct
50 Correct 1 ms 344 KB Output is correct
51 Correct 1 ms 344 KB Output is correct
52 Correct 1 ms 348 KB Output is correct
53 Correct 1 ms 348 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 1 ms 348 KB Output is correct
56 Correct 1 ms 508 KB Output is correct
57 Correct 1 ms 348 KB Output is correct
58 Correct 1 ms 348 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 96 ms 13820 KB Output is correct
62 Correct 102 ms 14012 KB Output is correct
63 Correct 86 ms 13656 KB Output is correct
64 Correct 109 ms 13652 KB Output is correct
65 Correct 109 ms 13832 KB Output is correct
66 Correct 112 ms 13740 KB Output is correct
67 Correct 104 ms 13652 KB Output is correct
68 Correct 77 ms 13752 KB Output is correct
69 Correct 72 ms 13648 KB Output is correct
70 Correct 70 ms 13392 KB Output is correct