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답안 #746271

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
746271 2023-05-22T06:33:39 Z baluteshih Chorus (JOI23_chorus) C++14
40 / 100
 95 ms 10136 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define X first
#define Y second
#define SZ(a) ((int)a.size())
#define ALL(v) v.begin(), v.end()
#define pb push_back

struct node {
    int first, sz;
    ll sum;
};

int lft[1000005];
list<node>::iterator arr[1000005];

int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n, k;
    long long ans = 0;
    string s;
    cin >> n >> k >> s;
    if (n > 500) return 0;

    vector<int> plA, plB;
    for (int i = 0; i < n + n; ++i) {
        if (s[i] == 'B') 
            plB.pb(i);
        else
            plA.pb(i), lft[SZ(plA)] = SZ(plB);
    }

    const ll INF = 1e18;
    vector<vector<ll>> dp(k + 1, vector<ll>(n + 1, INF));
    ll fin = INF;
    dp[0][0] = 0;
    for (int i = 0; i < k; ++i) {
        for (int j = 1; j <= n; ++j) {
            ll sum = 0;
            for (int p = j; p <= n; ++p) {
                sum += max(0, lft[p] - (j - 1));
                dp[i + 1][p] = min(dp[i + 1][p], dp[i][j - 1] + sum);
            }
        }
        fin = min(fin, dp[i + 1][n]);
    }

    cout << ans + fin << "\n";

    /*list<node> grp;
    typedef pair<ll, int> pr;
    priority_queue<pr, vector<pr>, greater<pr>> pq;
    node cur;
    cur.first = -1;
    for (int i = 0; i < n; ++i) {
        if (cur.first == -1 || plA[i] > plB[cur.first]) {
            if (cur.first != -1)
                grp.pb(cur);
            cur.first = i;
            cur.sz = 1;
            cur.sum = lft[i];
        }
        else {
            cur.sz += 1;
            cur.sum += lft[i];
        }
    }
    grp.pb(cur);

    auto cal = [&](list<node>::iterator it) {
        if (next(it) == grp.end()) return -1LL;
        ll cst;
        cst = next(it)->sum - it->first * next(it)->sz;
        return cst;
    };

    auto rm = [&](list<node>::iterator it) {
        it->sz += next(it)->sz;
        it->sum += next(it)->sz * it->first;
        arr[next(it)->first] = grp.end();
        grp.erase(next(it));
        if (next(it) != grp.end())
            pq.push(pr(cal(it), it->first));
        if (it != grp.begin())
            pq.push(pr(cal(prev(it)), prev(it)->first));
    };

    for (int i = 0; i < n; ++i)
        arr[i] = grp.end();

    for (auto it = grp.begin(); next(it) != grp.end(); ++it) {
        arr[it->first] = it;
        pq.push(pr(cal(it), it->first));
    }

    cerr << s << "\n";
    for (int i = 0; i < n; ++i)
        cerr << plA[i] << " ";
    cerr << endl;
    for (int i = 0; i < n; ++i)
        cerr << plB[i] << " ";
    cerr << endl;

    cerr << ans << "\n";

    while (!pq.empty() && SZ(grp) > k) {
        auto [cst, first] = pq.top();
        pq.pop();
        if (arr[first] == grp.end() || cst != cal(arr[first])) continue;
        ans += cst;
        rm(arr[first]);
    }
    assert(SZ(grp) <= k);

    cout << ans << "\n";*/
}

Subtask #1
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8148 KB Output is correct
2 Correct 3 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 3 ms 8148 KB Output is correct
5 Correct 3 ms 8148 KB Output is correct
6 Correct 4 ms 8148 KB Output is correct
7 Correct 5 ms 8148 KB Output is correct
8 Correct 4 ms 8148 KB Output is correct
9 Correct 4 ms 8144 KB Output is correct
10 Correct 3 ms 8148 KB Output is correct
11 Correct 5 ms 8148 KB Output is correct
12 Correct 4 ms 8148 KB Output is correct
13 Correct 5 ms 8148 KB Output is correct
14 Correct 4 ms 8148 KB Output is correct
15 Correct 3 ms 8148 KB Output is correct
16 Correct 3 ms 8148 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8148 KB Output is correct
2 Correct 3 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 3 ms 8148 KB Output is correct
5 Correct 3 ms 8148 KB Output is correct
6 Correct 4 ms 8148 KB Output is correct
7 Correct 5 ms 8148 KB Output is correct
8 Correct 4 ms 8148 KB Output is correct
9 Correct 4 ms 8144 KB Output is correct
10 Correct 3 ms 8148 KB Output is correct
11 Correct 5 ms 8148 KB Output is correct
12 Correct 4 ms 8148 KB Output is correct
13 Correct 5 ms 8148 KB Output is correct
14 Correct 4 ms 8148 KB Output is correct
15 Correct 3 ms 8148 KB Output is correct
16 Correct 3 ms 8148 KB Output is correct
17 Correct 5 ms 8148 KB Output is correct
18 Correct 18 ms 8532 KB Output is correct
19 Correct 61 ms 9172 KB Output is correct
20 Correct 6 ms 8148 KB Output is correct
21 Correct 4 ms 8148 KB Output is correct
22 Correct 92 ms 10120 KB Output is correct
23 Correct 84 ms 10136 KB Output is correct
24 Correct 5 ms 8148 KB Output is correct
25 Correct 95 ms 10128 KB Output is correct
26 Correct 76 ms 9792 KB Output is correct
27 Correct 31 ms 8796 KB Output is correct
28 Correct 31 ms 8788 KB Output is correct

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8148 KB Output is correct
2 Correct 3 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 3 ms 8148 KB Output is correct
5 Correct 3 ms 8148 KB Output is correct
6 Correct 4 ms 8148 KB Output is correct
7 Correct 5 ms 8148 KB Output is correct
8 Correct 4 ms 8148 KB Output is correct
9 Correct 4 ms 8144 KB Output is correct
10 Correct 3 ms 8148 KB Output is correct
11 Correct 5 ms 8148 KB Output is correct
12 Correct 4 ms 8148 KB Output is correct
13 Correct 5 ms 8148 KB Output is correct
14 Correct 4 ms 8148 KB Output is correct
15 Correct 3 ms 8148 KB Output is correct
16 Correct 3 ms 8148 KB Output is correct
17 Correct 5 ms 8148 KB Output is correct
18 Correct 18 ms 8532 KB Output is correct
19 Correct 61 ms 9172 KB Output is correct
20 Correct 6 ms 8148 KB Output is correct
21 Correct 4 ms 8148 KB Output is correct
22 Correct 92 ms 10120 KB Output is correct
23 Correct 84 ms 10136 KB Output is correct
24 Correct 5 ms 8148 KB Output is correct
25 Correct 95 ms 10128 KB Output is correct
26 Correct 76 ms 9792 KB Output is correct
27 Correct 31 ms 8796 KB Output is correct
28 Correct 31 ms 8788 KB Output is correct
29 Incorrect 4 ms 8164 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8148 KB Output is correct
2 Correct 3 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 3 ms 8148 KB Output is correct
5 Correct 3 ms 8148 KB Output is correct
6 Correct 4 ms 8148 KB Output is correct
7 Correct 5 ms 8148 KB Output is correct
8 Correct 4 ms 8148 KB Output is correct
9 Correct 4 ms 8144 KB Output is correct
10 Correct 3 ms 8148 KB Output is correct
11 Correct 5 ms 8148 KB Output is correct
12 Correct 4 ms 8148 KB Output is correct
13 Correct 5 ms 8148 KB Output is correct
14 Correct 4 ms 8148 KB Output is correct
15 Correct 3 ms 8148 KB Output is correct
16 Correct 3 ms 8148 KB Output is correct
17 Correct 5 ms 8148 KB Output is correct
18 Correct 18 ms 8532 KB Output is correct
19 Correct 61 ms 9172 KB Output is correct
20 Correct 6 ms 8148 KB Output is correct
21 Correct 4 ms 8148 KB Output is correct
22 Correct 92 ms 10120 KB Output is correct
23 Correct 84 ms 10136 KB Output is correct
24 Correct 5 ms 8148 KB Output is correct
25 Correct 95 ms 10128 KB Output is correct
26 Correct 76 ms 9792 KB Output is correct
27 Correct 31 ms 8796 KB Output is correct
28 Correct 31 ms 8788 KB Output is correct
29 Incorrect 4 ms 8164 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8148 KB Output is correct
2 Correct 3 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 3 ms 8148 KB Output is correct
5 Correct 3 ms 8148 KB Output is correct
6 Correct 4 ms 8148 KB Output is correct
7 Correct 5 ms 8148 KB Output is correct
8 Correct 4 ms 8148 KB Output is correct
9 Correct 4 ms 8144 KB Output is correct
10 Correct 3 ms 8148 KB Output is correct
11 Correct 5 ms 8148 KB Output is correct
12 Correct 4 ms 8148 KB Output is correct
13 Correct 5 ms 8148 KB Output is correct
14 Correct 4 ms 8148 KB Output is correct
15 Correct 3 ms 8148 KB Output is correct
16 Correct 3 ms 8148 KB Output is correct
17 Correct 5 ms 8148 KB Output is correct
18 Correct 18 ms 8532 KB Output is correct
19 Correct 61 ms 9172 KB Output is correct
20 Correct 6 ms 8148 KB Output is correct
21 Correct 4 ms 8148 KB Output is correct
22 Correct 92 ms 10120 KB Output is correct
23 Correct 84 ms 10136 KB Output is correct
24 Correct 5 ms 8148 KB Output is correct
25 Correct 95 ms 10128 KB Output is correct
26 Correct 76 ms 9792 KB Output is correct
27 Correct 31 ms 8796 KB Output is correct
28 Correct 31 ms 8788 KB Output is correct
29 Incorrect 4 ms 8164 KB Output isn't correct
30 Halted 0 ms 0 KB -