oj.uz

답안 #894771

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
894771 2023-12-29T01:06:56 Z ksujay2 Chorus (JOI23_chorus) C++17
61 / 100
 128 ms 6520 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

struct Line {
    ll m, b, s;
    ll eval(ll x) { return m * x + b; }
};
int main() {
    int N, K; cin >> N >> K;
    string s; cin >> s;
    vector<int> h(N);
    int x = 0, y = 0;
    for(int i = 0; i < 2 * N; i++) {
        if(s[i] == 'A') h[x] = y, x++;
        else y++;
    }
    auto f = [&] (ll k) {
        vector<pair<int, Line>> cht;
        int best = 0;
        vector<pair<ll, ll>> dp(N + 1);
        ll g = 0;
        int j = 0;
        for(int i = 0; i < N; i++) {
            while(j <= h[i] && j <= i) {
                Line l;
                l.m = -j;
                l.b = dp[j].first - g + (ll) i * j;
                while(cht.size() > 0) {
                    if(cht.back().second.eval(cht.back().second.s) > l.eval(cht.back().second.s)) cht.pop_back();
                    else break;
                    if(best == cht.size()) best--;
                }
                if(cht.size() == 0) {
                    l.s = 0;
                    cht.push_back({j, l});
                    best = 0;
                } else {
                    l.s = (l.b - cht.back().second.b) / (cht.back().second.m - l.m) + 1;
                    cht.push_back({j, l});
                }
                j++;
            }
            g += h[i];
            while(best + 1 < cht.size() && cht[best + 1].second.s <= i + 1) best++;
            dp[i + 1].first = cht[best].second.eval(i + 1) + k + g;
            dp[i + 1].second = dp[cht[best].first].second + 1;
        }
        return dp[N];
    };
    ll L = 0, R = N * N + 1;
    while(L < R) {
        ll mid = (L + R) / 2;
        if(f(mid).second <= K) {
            R = mid;
        } else {
            L = mid + 1;
        }
    }
    pair<ll, ll> ans = f(L);
    cout << ans.first - L * K << endl;
}

Compilation message

chorus.cpp: In lambda function:
chorus.cpp:32:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, Line> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |                     if(best == cht.size()) best--;
      |                        ~~~~~^~~~~~~~~~~~~
chorus.cpp:45:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, Line> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |             while(best + 1 < cht.size() && cht[best + 1].second.s <= i + 1) best++;
      |                   ~~~~~~~~~^~~~~~~~~~~~

Subtask #1
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 432 KB Output is correct
28 Correct 1 ms 348 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 432 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 4 ms 972 KB Output is correct
30 Correct 5 ms 768 KB Output is correct
31 Correct 4 ms 776 KB Output is correct
32 Correct 3 ms 776 KB Output is correct
33 Correct 4 ms 772 KB Output is correct
34 Correct 4 ms 968 KB Output is correct
35 Correct 4 ms 1156 KB Output is correct
36 Correct 4 ms 680 KB Output is correct
37 Correct 4 ms 776 KB Output is correct
38 Correct 4 ms 964 KB Output is correct
39 Correct 4 ms 784 KB Output is correct
40 Correct 3 ms 664 KB Output is correct
41 Correct 3 ms 664 KB Output is correct
42 Correct 2 ms 656 KB Output is correct

Subtask #4
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 432 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 4 ms 972 KB Output is correct
30 Correct 5 ms 768 KB Output is correct
31 Correct 4 ms 776 KB Output is correct
32 Correct 3 ms 776 KB Output is correct
33 Correct 4 ms 772 KB Output is correct
34 Correct 4 ms 968 KB Output is correct
35 Correct 4 ms 1156 KB Output is correct
36 Correct 4 ms 680 KB Output is correct
37 Correct 4 ms 776 KB Output is correct
38 Correct 4 ms 964 KB Output is correct
39 Correct 4 ms 784 KB Output is correct
40 Correct 3 ms 664 KB Output is correct
41 Correct 3 ms 664 KB Output is correct
42 Correct 2 ms 656 KB Output is correct
43 Correct 6 ms 3872 KB Output is correct
44 Correct 121 ms 6520 KB Output is correct
45 Correct 128 ms 6456 KB Output is correct
46 Incorrect 95 ms 6244 KB Output isn't correct
47 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 432 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 4 ms 972 KB Output is correct
30 Correct 5 ms 768 KB Output is correct
31 Correct 4 ms 776 KB Output is correct
32 Correct 3 ms 776 KB Output is correct
33 Correct 4 ms 772 KB Output is correct
34 Correct 4 ms 968 KB Output is correct
35 Correct 4 ms 1156 KB Output is correct
36 Correct 4 ms 680 KB Output is correct
37 Correct 4 ms 776 KB Output is correct
38 Correct 4 ms 964 KB Output is correct
39 Correct 4 ms 784 KB Output is correct
40 Correct 3 ms 664 KB Output is correct
41 Correct 3 ms 664 KB Output is correct
42 Correct 2 ms 656 KB Output is correct
43 Correct 6 ms 3872 KB Output is correct
44 Correct 121 ms 6520 KB Output is correct
45 Correct 128 ms 6456 KB Output is correct
46 Incorrect 95 ms 6244 KB Output isn't correct
47 Halted 0 ms 0 KB -