oj.uz

Submission #959805

# Submission time Handle Problem Language Result Execution time Memory
959805 2024-04-09T06:54:46 Z Yang8on Semiexpress (JOI17_semiexpress) C++14
48 / 100
 1000 ms 15644 KB 
#include <bits/stdc++.h>
#define Y8o "Semiexpress"
#define maxn 3005
#define ll long long
#define pii pair<int, int>
#define gb(i, j) ((i >> j) & 1)

using namespace std;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll GetRandom(ll l, ll r)
{
    return uniform_int_distribution<ll> (l, r) (rng);
}
void iof()
{
    if(fopen(Y8o".inp", "r"))
    {
        freopen(Y8o".inp", "r", stdin);
//        freopen(Y8o".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(NULL), cout.tie(NULL);
}
void ctime()
{
    cerr << "\n" << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}


int n, m, k;
ll A, B, C, T;
ll a[maxn];

int sum[maxn][maxn]; /// sum[i][j] : số lượng nhiều nhất khi xét nhóm i, đặt j vt
int dp[maxn][maxn]; /// dp[i][j] : số lượng nhiều nhất khi xét đến nhóm i, đặt j vt
int limit[maxn]; /// limit[i] : so luong dat nhieu nhat tai nhom i
void prepare()
{
    for(int i = 1, cnt = 0; i <= m; i ++, cnt = 0)
    {
        ll val = (a[i] - 1) * B;
        if(val > T) break;

        ll val2 = val, pos = a[i + 1] - 1;

        int l = a[i] + 1, r = a[i + 1] - 1, lim = a[i];
        while(1)
        {
            while(l <= r)
            {
                int mid = (l + r) >> 1;
                if(val2 + A * (mid - lim) > T) r = mid - 1;
                else l = mid + 1;
            }

            if(l > pos) break;

            val2 = val + (l - a[i]) * C;
            if(val2 > T)
            {
                pos = l - 1;
                break;
            }

            sum[i][cnt ++] = (l - 1) - a[i] + 1 - (i == 1);
            lim = l ++, r = a[i + 1] - 1;

            if(l > r) break;
        }
        sum[i][cnt] = pos - a[i] + 1 - (i == 1);
        if(i == m) sum[i][cnt] = 1;
        limit[i] = cnt;
//        for(int t = a[i] + 1; t <= a[i + 1] - 1; t ++)
//        {
//            val2 += A;
//            if(val2 > T)
//            {
//                val2 = val + (t - a[i]) * C;
//                if(val2 > T)
//                {
//                    pos = t - 1;
//                    break;
//                }
//
//                sum[i][cnt ++] = (t - 1) - a[i] + 1 - (i == 1);
//            }
//        }
//        sum[i][cnt] = pos - a[i] + 1 - (i == 1);
//        if(i == m) sum[i][cnt] = 1;
    }
}

void sub2()
{
    prepare();

    for(int i = 1; i <= m; i ++)
    {
        for(int j = 0; j <= k; j ++)
        {
            for(int t = 0; t <= j; t ++)
            {
                dp[i][j] = max(dp[i][j], dp[i - 1][t] + sum[i][j - t]);
            }
        }
    }

    int ans = 0;
    for(int t = 0; t <= k; t ++) ans = max(ans, dp[m][t]);
    cout << ans;
}

struct dl
{
    int val, i, cnt;
    bool operator < (const dl & other)
    const { return val < other.val; };
};  priority_queue<dl> q;

void sub()
{
    prepare();

    for(int i = 1; i <= m; i ++) q.push({ sum[i][0], i, 0 });

    int ans = 0;
    while(q.size())
    {
        int val = q.top().val, i = q.top().i, cnt = q.top().cnt;
        q.pop();

        if(cnt)
        {
            if(k >= 1) k --;
            else continue;
        }

        ans += val;
        if(cnt < limit[i]) q.push({ max(0, sum[i][cnt + 1] - sum[i][cnt]), i, cnt + 1 });
    }

    cout << ans;
}

void solve()
{
    cin >> n >> m >> k, k -= m;
    cin >> A >> B >> C >> T;
    for(int i = 1; i <= m; i ++) cin >> a[i];

    sub2();
//    if(n <= 300) sub2();
//    else sub();
}


int main()
{
    iof();

    int nTest = 1;
//    cin >> nTest;

    while(nTest --)
    {
        solve();
    }

    ctime();
    return 0;
}

Compilation message

semiexpress.cpp: In function 'void iof()':
semiexpress.cpp:19:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |         freopen(Y8o".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2904 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2904 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2648 KB Output is correct

Subtask #3
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2904 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2648 KB Output is correct
19 Correct 142 ms 12976 KB Output is correct
20 Correct 708 ms 15644 KB Output is correct
21 Execution timed out 1081 ms 10724 KB Time limit exceeded
22 Halted 0 ms 0 KB -