답안 #767425

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
767425	2023-06-26T18:26:11 Z	PurpleCrayon	Chorus (JOI23_chorus)	C++17	40 / 100	7000 ms	125040 KB

chorus

#include <bits/stdc++.h>
using namespace std;

#define sz(v) int(v.size())
#define ar array
typedef long long ll;
const int N = 5e3+10, MOD = 1e9+7;

int n, K, small[N], cost[N][N];
int ps[N], l_use[N];
vector<int> one, two;
int dp[N][N];

void solve() {
    cin >> n >> K;
    for (int i = 0; i < 2 * n; i++) {
        char c; cin >> c;
        if (c == 'A') one.push_back(i);
        else two.push_back(i);
    }

    // for (int x : one) cerr << x << ' '; cerr << endl;
    // for (int x : two) cerr << x << ' '; cerr << endl;

    for (int i = 0; i < n; i++) {
        small[i] = lower_bound(two.begin(), two.end(), one[i]) - two.begin();
    }

    for (int i = 0; i < n; i++) {
        ps[i] = small[i] + (i ? ps[i-1] : 0);
        l_use[i] = -(i ? ps[i-1] : 0);
        for (int j = i; j < n; j++) {
            if (small[j] < i) {
                l_use[i] -= small[j] - i;
            }
        }
    }

    // -l * (r - l + 1) + ps_small[r] - other_ps_small[l-1]
    // other_ps_small[l-1] = (small[r] < l ?
    // for (int i = 0; i < n; i++) cerr << small[i] << ' ';
    // cerr << endl;

    for (int l = 0; l < n; l++) {
        int cur = 0;
        for (int r = l; r < n; r++) {
            cur += max(small[r] - l, 0);
            cost[l][r] = cur;
        }
    }
    
    auto COST = [&](int l, int r) {
        return ps[r] + l_use[l] - l * (r - l + 1);
    };

    for (int i = 0; i < n; i++) {
        for (int j = i; j < n; j++) {
            int one = cost[i][j];
            int two = COST(i, j);
            assert(one == 0 && two > 0 || one == two);
        }
    }

    for (int i = 0; i < n; i++) for (int j = 0; j <= K; j++) dp[i][j] = MOD;

    for (int i = 0; i < n; i++) {
        for (int k = 1; k <= K; k++) {
            for (int l = i; l >= 0; l--) {
                dp[i][k] = min(dp[i][k], COST(l, i) + (l == 0 ? 0 : dp[l-1][k-1]));
            }

            int l = small[i];
            if (l <= i) {
                dp[i][k] = min(dp[i][k], (l == 0 ? 0 : dp[l-1][k-1]));
            }
        }
    }

    cout << dp[n-1][K] << '\n';
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    int T = 1;
    // cin >> T;
    while (T--) solve();
}

Compilation message

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from chorus.cpp:1:
chorus.cpp: In function 'void solve()':
chorus.cpp:60:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   60 |             assert(one == 0 && two > 0 || one == two);
      |                    ~~~~~~~~~^~~~~~~~~~

Subtask #1
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	2 ms	1876 KB	Output is correct
18	Correct	16 ms	4948 KB	Output is correct
19	Correct	45 ms	5400 KB	Output is correct
20	Correct	3 ms	4820 KB	Output is correct
21	Correct	3 ms	4820 KB	Output is correct
22	Correct	79 ms	5844 KB	Output is correct
23	Correct	78 ms	5844 KB	Output is correct
24	Correct	4 ms	4820 KB	Output is correct
25	Correct	80 ms	5836 KB	Output is correct
26	Correct	69 ms	5588 KB	Output is correct
27	Correct	29 ms	5204 KB	Output is correct
28	Correct	29 ms	5200 KB	Output is correct

Subtask #3
0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	2 ms	1876 KB	Output is correct
18	Correct	16 ms	4948 KB	Output is correct
19	Correct	45 ms	5400 KB	Output is correct
20	Correct	3 ms	4820 KB	Output is correct
21	Correct	3 ms	4820 KB	Output is correct
22	Correct	79 ms	5844 KB	Output is correct
23	Correct	78 ms	5844 KB	Output is correct
24	Correct	4 ms	4820 KB	Output is correct
25	Correct	80 ms	5836 KB	Output is correct
26	Correct	69 ms	5588 KB	Output is correct
27	Correct	29 ms	5204 KB	Output is correct
28	Correct	29 ms	5200 KB	Output is correct
29	Execution timed out	7079 ms	125040 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Subtask #4
0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	2 ms	1876 KB	Output is correct
18	Correct	16 ms	4948 KB	Output is correct
19	Correct	45 ms	5400 KB	Output is correct
20	Correct	3 ms	4820 KB	Output is correct
21	Correct	3 ms	4820 KB	Output is correct
22	Correct	79 ms	5844 KB	Output is correct
23	Correct	78 ms	5844 KB	Output is correct
24	Correct	4 ms	4820 KB	Output is correct
25	Correct	80 ms	5836 KB	Output is correct
26	Correct	69 ms	5588 KB	Output is correct
27	Correct	29 ms	5204 KB	Output is correct
28	Correct	29 ms	5200 KB	Output is correct
29	Execution timed out	7079 ms	125040 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Subtask #5
0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	2 ms	1876 KB	Output is correct
18	Correct	16 ms	4948 KB	Output is correct
19	Correct	45 ms	5400 KB	Output is correct
20	Correct	3 ms	4820 KB	Output is correct
21	Correct	3 ms	4820 KB	Output is correct
22	Correct	79 ms	5844 KB	Output is correct
23	Correct	78 ms	5844 KB	Output is correct
24	Correct	4 ms	4820 KB	Output is correct
25	Correct	80 ms	5836 KB	Output is correct
26	Correct	69 ms	5588 KB	Output is correct
27	Correct	29 ms	5204 KB	Output is correct
28	Correct	29 ms	5200 KB	Output is correct
29	Execution timed out	7079 ms	125040 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

답안 #767425

Compilation message

Subtask #1 16.0 / 16.0

Subtask #2 24.0 / 24.0

Subtask #3 0 / 21.0

Subtask #4 0 / 26.0

Subtask #5 0 / 13.0

Subtask #1
16.0 / 16.0

Subtask #2
24.0 / 24.0

Subtask #3
0 / 21.0

Subtask #4
0 / 26.0

Subtask #5
0 / 13.0