Submission #248705

#	Time	Username	Problem	Language	Result	Execution time	Memory
248705		SamAnd	Feast (NOI19_feast)	C++17	59 / 100	1087 ms	9416 KiB

feast

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 300005;
const ll INF = 1000000009000000009;

int n, k;
int a[N];

ll p[N];

ll dp[N];

void solv()
{
    scanf("%d%d", &n, &k);
    for (int i = 1; i <= n; ++i)
        scanf("%d", &a[i]);
    for (int i = 1; i <= n; ++i)
        p[i] = p[i - 1] + a[i];
    for (int ii = 0; ii < k; ++ii)
    {
        ll maxu = -INF;
        for (int i = 0; i <= n; ++i)
        {
            maxu = max(maxu, dp[i] - p[i]);
            dp[i] = p[i] + maxu;
            if (i)
                dp[i] = max(dp[i], dp[i - 1]);
        }
    }
    printf("%lld\n", dp[n]);
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    solv();
    return 0;
}

//while ((double)clock() / CLOCKS_PER_SEC <= 0.9){}

Compilation message (stderr)

feast.cpp: In function 'void solv()':
feast.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~
feast.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 18 / 18
• Subtask 4: 10 / 10
• Subtask 5: 11 / 11
• Subtask 6: 20 / 20
• Subtask 7: 0 / 29