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답안 #902479

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
902479 2024-01-10T13:16:24 Z Tuanlinh123 Chorus (JOI23_chorus) C++17
61 / 100
 37 ms 11856 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,fma,bmi,bmi2,popcnt,lzcnt")
#include<bits/stdc++.h>
#define ll int
#define pll pair<ll, ll>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define ld long double
using namespace std;
 
const long long inf=2e6, maxn=1e6+5;
ll n, k, cnt[maxn], to[maxn];
long long dp[maxn], pre[maxn];
 
struct Line
{
    long long a=inf, b=inf;
    ll idx=0;
 
    Line(){}
    Line(long long a, long long b, ll idx): a(a), b(b), idx(idx){}
    inline pair<long long, ll> ask(long long x)
    {
        if (a==inf) return {inf*inf, idx};
        return {a*x+b, idx};
    }
};
 
struct Node
{
    Line A;
    Node *l, *r;
};
 
struct Lichao
{
    Node *root=new Node();
    inline void addline(Line A)
    {
        ll Start=-inf, End=inf;
        Node *i=root;
        while (1)
        {
            if (A.a==inf) break;
            ll mid=(Start+End)/2;
            bool l=A.ask(Start).fi<i->A.ask(Start).fi;
            bool m=A.ask(mid).fi<i->A.ask(mid).fi;
            if (m) swap(A, i->A);
            if (Start+1!=End)
            {
                if (l!=m)
                {
                    if (!i->l)
                        i->l=new Node();
                    i=i->l;
                    End=mid;
                }
                else
                {
                    if (!i->r)
                        i->r=new Node();
                    i=i->r;
                    Start=mid;
                }
            }
            else break;
        }
    }
 
    inline pair<long long, ll> query(long long x)
    {
        Node *i=root;
        ll Start=-inf, End=inf;
        pair<long long, ll> ans={inf*inf, 0};
        while (1)
        {
            ll mid=(Start+End)/2;
            ans=min(ans, i->A.ask(x));
            if (x<mid && i->l)
            {
                i=i->l;
                End=mid;
            }
            else if (x>=mid && i->r)
            {
                i=i->r;
                Start=mid;
            }
            else break;
        }
        return ans;
    }

    void destroy(Node *p)
    {
        if (p->l) destroy(p->l);
        if (p->r) destroy(p->r);
        delete(p);
    }
};
 
pair<long long, ll> solve(long long C)
{
    ll crr=1;
    Lichao A; A.addline(Line(0, -pre[to[0]-1], 0));
    for (ll i=1; i<=n; i++)
        dp[i]=inf*inf, cnt[i]=0;
    for (ll i=1; i<=n; i++)
    {
        while (crr<i && to[crr]<=i)
            A.addline(Line(-crr, -(pre[to[crr]-1]-(to[crr]-1)*crr)+dp[crr], cnt[crr])), crr++;
        tie(dp[i], cnt[i])=A.query(i); 
        dp[i]+=C+pre[i], cnt[i]++;
        if (crr<i && dp[crr]+C<dp[i])
            dp[i]=dp[crr]+C, cnt[i]=cnt[crr]+1;
    }
    A.destroy(A.root);
    return {dp[n], cnt[n]};
}
 
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> k;
    string s; cin >> s;
    ll x=0, y=0, crr=1;
    for (ll i=0; i<n*2; i++)
    {
        if (s[i]=='A')
            x++, pre[x]=pre[x-1]+y;
        else y++;
    }
    for (ll i=1; i<=n; i++)
        while (crr<=pre[i]-pre[i-1])
            to[crr]=i, crr++;
    while (crr<=n) to[crr]=n+1, crr++;
    for (ll i=0; i<=n; i++)
        if (to[i]<=i)
            to[i]=i+1;
    long long lo=0, hi=n*n;
    while (hi>lo)
    {
        ll mid=(lo+hi)/2;
        if (solve(mid).se<=k)
            hi=mid;
        else lo=mid+1;
    }
    cout << solve(lo).fi-k*lo;
}

Subtask #1
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6568 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6568 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 6488 KB Output is correct
18 Correct 3 ms 6488 KB Output is correct
19 Correct 3 ms 6492 KB Output is correct
20 Correct 3 ms 6572 KB Output is correct
21 Correct 3 ms 6492 KB Output is correct
22 Correct 3 ms 6492 KB Output is correct
23 Correct 4 ms 6492 KB Output is correct
24 Correct 3 ms 6488 KB Output is correct
25 Correct 3 ms 6492 KB Output is correct
26 Correct 4 ms 6492 KB Output is correct
27 Correct 3 ms 6744 KB Output is correct
28 Correct 3 ms 6488 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6568 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 6488 KB Output is correct
18 Correct 3 ms 6488 KB Output is correct
19 Correct 3 ms 6492 KB Output is correct
20 Correct 3 ms 6572 KB Output is correct
21 Correct 3 ms 6492 KB Output is correct
22 Correct 3 ms 6492 KB Output is correct
23 Correct 4 ms 6492 KB Output is correct
24 Correct 3 ms 6488 KB Output is correct
25 Correct 3 ms 6492 KB Output is correct
26 Correct 4 ms 6492 KB Output is correct
27 Correct 3 ms 6744 KB Output is correct
28 Correct 3 ms 6488 KB Output is correct
29 Correct 25 ms 7000 KB Output is correct
30 Correct 37 ms 6748 KB Output is correct
31 Correct 26 ms 7000 KB Output is correct
32 Correct 23 ms 7000 KB Output is correct
33 Correct 25 ms 7004 KB Output is correct
34 Correct 34 ms 7004 KB Output is correct
35 Correct 28 ms 7256 KB Output is correct
36 Correct 27 ms 6748 KB Output is correct
37 Correct 32 ms 7004 KB Output is correct
38 Correct 29 ms 7252 KB Output is correct
39 Correct 27 ms 7028 KB Output is correct
40 Correct 28 ms 7020 KB Output is correct
41 Correct 26 ms 7004 KB Output is correct
42 Correct 17 ms 6744 KB Output is correct

Subtask #4
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6568 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 6488 KB Output is correct
18 Correct 3 ms 6488 KB Output is correct
19 Correct 3 ms 6492 KB Output is correct
20 Correct 3 ms 6572 KB Output is correct
21 Correct 3 ms 6492 KB Output is correct
22 Correct 3 ms 6492 KB Output is correct
23 Correct 4 ms 6492 KB Output is correct
24 Correct 3 ms 6488 KB Output is correct
25 Correct 3 ms 6492 KB Output is correct
26 Correct 4 ms 6492 KB Output is correct
27 Correct 3 ms 6744 KB Output is correct
28 Correct 3 ms 6488 KB Output is correct
29 Correct 25 ms 7000 KB Output is correct
30 Correct 37 ms 6748 KB Output is correct
31 Correct 26 ms 7000 KB Output is correct
32 Correct 23 ms 7000 KB Output is correct
33 Correct 25 ms 7004 KB Output is correct
34 Correct 34 ms 7004 KB Output is correct
35 Correct 28 ms 7256 KB Output is correct
36 Correct 27 ms 6748 KB Output is correct
37 Correct 32 ms 7004 KB Output is correct
38 Correct 29 ms 7252 KB Output is correct
39 Correct 27 ms 7028 KB Output is correct
40 Correct 28 ms 7020 KB Output is correct
41 Correct 26 ms 7004 KB Output is correct
42 Correct 17 ms 6744 KB Output is correct
43 Incorrect 33 ms 11856 KB Output isn't correct
44 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6568 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 6488 KB Output is correct
18 Correct 3 ms 6488 KB Output is correct
19 Correct 3 ms 6492 KB Output is correct
20 Correct 3 ms 6572 KB Output is correct
21 Correct 3 ms 6492 KB Output is correct
22 Correct 3 ms 6492 KB Output is correct
23 Correct 4 ms 6492 KB Output is correct
24 Correct 3 ms 6488 KB Output is correct
25 Correct 3 ms 6492 KB Output is correct
26 Correct 4 ms 6492 KB Output is correct
27 Correct 3 ms 6744 KB Output is correct
28 Correct 3 ms 6488 KB Output is correct
29 Correct 25 ms 7000 KB Output is correct
30 Correct 37 ms 6748 KB Output is correct
31 Correct 26 ms 7000 KB Output is correct
32 Correct 23 ms 7000 KB Output is correct
33 Correct 25 ms 7004 KB Output is correct
34 Correct 34 ms 7004 KB Output is correct
35 Correct 28 ms 7256 KB Output is correct
36 Correct 27 ms 6748 KB Output is correct
37 Correct 32 ms 7004 KB Output is correct
38 Correct 29 ms 7252 KB Output is correct
39 Correct 27 ms 7028 KB Output is correct
40 Correct 28 ms 7020 KB Output is correct
41 Correct 26 ms 7004 KB Output is correct
42 Correct 17 ms 6744 KB Output is correct
43 Incorrect 33 ms 11856 KB Output isn't correct
44 Halted 0 ms 0 KB -