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Submission #1103122

# Submission time Handle Problem Language Result Execution time Memory
1103122 2024-10-20T07:25:00 Z khoaha123 Feast (NOI19_feast) C++14
40 / 100
 1000 ms 224116 KB 
#include <bits/stdc++.h>
#define endl '\n'
#define ii pair<int,int>
#define task ""
#define all(x) x.begin(),x.end()
#define MASK(x) (1 << (x))
#define int long long
using namespace std;
const int N = 3e5 + 5;
const int LOG = 20;
const int mod = 998244353;
const long long INF = 1e18;

int n,a[N],dp[305][305][305],s[N];

int calc(int l,int r,int k){
    if (k == 0) return 0;
    if (l == r) return max(a[l],0LL);
    int &res = dp[l][r][k];
    if (res != -1) return res;
    res = 0;

    for (int i = l; i < r; ++i){
        for (int j = 0; j <= min(k,(i-l+1)); ++j){
            res = max(res,calc(l,i,j) + calc(i+1,r,k-j));
        }
    }
    res = max(res,s[r] - s[l-1]);
    return res;
}
int k;
void subtask1(void){
    int sum = 0;
    for (int i = 1; i <= n; ++i) sum += a[i];
    cout << sum;
}

void subtask2(void){
    int pos = -1;

    for (int i = 1; i <= n; ++i){
        if (a[i] < 0){
            pos = i;break;
        }
    }
    if (pos == -1){
        subtask1();return;
    }
    int sum = 0;
    for (int i = 1; i <= n; ++i) sum += a[i];
    if (k == 1){

        int sum1 = 0,sum2 = 0;
        for (int i = 1; i < pos; ++i) sum1 += a[i];
        for (int i = pos+1; i <= n; ++i) sum2 += a[i];
        cout << max(sum1,max(sum2,sum));
    }
    else {
        cout << max(sum,sum - a[pos]);
    }
}

void subtask3(void){
    int best = 0;
    int sum = 0;
    for (int i = 1; i <= n; ++i){
        sum = max(a[i],sum + a[i]);
        best = max(best,sum);
    }
    cout << best;
}

void subtask4(void){
    memset(dp,-1,sizeof(dp));

    cout << calc(1,n,k) << endl;

}

long long Rand(long long l, long long r) {
    long long res = 0;
    for (int i= 1; i <= 4; ++i) res = (res << 15) ^ (rand() & ((1 << 15) - 1));
    return l + res % (r-l+1);
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    if (fopen(task".INP","r")){
        freopen(task".INP","r",stdin);
        freopen(task".OUT","w",stdout);
    }
    srand(time(NULL));
    cin >> n >> k;


    int sub1 = 0,am = 0;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
        //a[i] = Rand(-1000000000,1000000000);
        if (a[i] >= 0) sub1++;
        else am++;
        s[i] = s[i-1] + a[i];
    }

    if (sub1 == n){
        subtask1();
        return 0;
    }
  	if (k == 1){
        subtask3();
        return 0;
    }
    if (am == 1){
        subtask2();
        return 0;
    }

    subtask4();
    return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:91:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |         freopen(task".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
feast.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen(task".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 7504 KB Output is correct
2 Correct 23 ms 7504 KB Output is correct
3 Correct 25 ms 7676 KB Output is correct
4 Correct 23 ms 7472 KB Output is correct
5 Correct 23 ms 7504 KB Output is correct
6 Correct 24 ms 7504 KB Output is correct
7 Correct 20 ms 7504 KB Output is correct
8 Correct 22 ms 7496 KB Output is correct
9 Correct 20 ms 7676 KB Output is correct
10 Correct 20 ms 7560 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 7556 KB Output is correct
2 Correct 14 ms 7504 KB Output is correct
3 Correct 13 ms 7504 KB Output is correct
4 Correct 14 ms 7504 KB Output is correct
5 Correct 21 ms 7504 KB Output is correct
6 Correct 13 ms 7504 KB Output is correct
7 Correct 13 ms 7560 KB Output is correct
8 Correct 20 ms 7504 KB Output is correct
9 Correct 22 ms 7496 KB Output is correct
10 Correct 15 ms 7504 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 7504 KB Output is correct
2 Correct 25 ms 7500 KB Output is correct
3 Correct 25 ms 7516 KB Output is correct
4 Correct 26 ms 7504 KB Output is correct
5 Correct 24 ms 7504 KB Output is correct
6 Correct 25 ms 7504 KB Output is correct
7 Correct 26 ms 7504 KB Output is correct
8 Correct 24 ms 7508 KB Output is correct
9 Correct 25 ms 7504 KB Output is correct
10 Correct 26 ms 7548 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 567 ms 223884 KB Output is correct
3 Correct 124 ms 224072 KB Output is correct
4 Correct 133 ms 224072 KB Output is correct
5 Correct 172 ms 224116 KB Output is correct
6 Correct 169 ms 224072 KB Output is correct
7 Correct 153 ms 224072 KB Output is correct
8 Correct 125 ms 224072 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 134 ms 223932 KB Output is correct

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 567 ms 223884 KB Output is correct
3 Correct 124 ms 224072 KB Output is correct
4 Correct 133 ms 224072 KB Output is correct
5 Correct 172 ms 224116 KB Output is correct
6 Correct 169 ms 224072 KB Output is correct
7 Correct 153 ms 224072 KB Output is correct
8 Correct 125 ms 224072 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 134 ms 223932 KB Output is correct
11 Execution timed out 1080 ms 224048 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 567 ms 223884 KB Output is correct
3 Correct 124 ms 224072 KB Output is correct
4 Correct 133 ms 224072 KB Output is correct
5 Correct 172 ms 224116 KB Output is correct
6 Correct 169 ms 224072 KB Output is correct
7 Correct 153 ms 224072 KB Output is correct
8 Correct 125 ms 224072 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 134 ms 223932 KB Output is correct
11 Execution timed out 1080 ms 224048 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 7504 KB Output is correct
2 Correct 23 ms 7504 KB Output is correct
3 Correct 25 ms 7676 KB Output is correct
4 Correct 23 ms 7472 KB Output is correct
5 Correct 23 ms 7504 KB Output is correct
6 Correct 24 ms 7504 KB Output is correct
7 Correct 20 ms 7504 KB Output is correct
8 Correct 22 ms 7496 KB Output is correct
9 Correct 20 ms 7676 KB Output is correct
10 Correct 20 ms 7560 KB Output is correct
11 Correct 13 ms 7556 KB Output is correct
12 Correct 14 ms 7504 KB Output is correct
13 Correct 13 ms 7504 KB Output is correct
14 Correct 14 ms 7504 KB Output is correct
15 Correct 21 ms 7504 KB Output is correct
16 Correct 13 ms 7504 KB Output is correct
17 Correct 13 ms 7560 KB Output is correct
18 Correct 20 ms 7504 KB Output is correct
19 Correct 22 ms 7496 KB Output is correct
20 Correct 15 ms 7504 KB Output is correct
21 Correct 23 ms 7504 KB Output is correct
22 Correct 25 ms 7500 KB Output is correct
23 Correct 25 ms 7516 KB Output is correct
24 Correct 26 ms 7504 KB Output is correct
25 Correct 24 ms 7504 KB Output is correct
26 Correct 25 ms 7504 KB Output is correct
27 Correct 26 ms 7504 KB Output is correct
28 Correct 24 ms 7508 KB Output is correct
29 Correct 25 ms 7504 KB Output is correct
30 Correct 26 ms 7548 KB Output is correct
31 Correct 1 ms 2384 KB Output is correct
32 Correct 567 ms 223884 KB Output is correct
33 Correct 124 ms 224072 KB Output is correct
34 Correct 133 ms 224072 KB Output is correct
35 Correct 172 ms 224116 KB Output is correct
36 Correct 169 ms 224072 KB Output is correct
37 Correct 153 ms 224072 KB Output is correct
38 Correct 125 ms 224072 KB Output is correct
39 Correct 1 ms 2384 KB Output is correct
40 Correct 134 ms 223932 KB Output is correct
41 Execution timed out 1080 ms 224048 KB Time limit exceeded
42 Halted 0 ms 0 KB -