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답안 #901767

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
901767 2024-01-10T02:02:05 Z Tuanlinh123 Chorus (JOI23_chorus) C++17
87 / 100
 4969 ms 1048576 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,fma,bmi,bmi2,popcnt,lzcnt")
#include<bits/stdc++.h>
#define ll long long
#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 ll inf=2e6, maxn=1e6+5;
ll n, k, pre[maxn], to[maxn];
 
struct Line
{
    ll a=inf, b=inf, idx=0;
 
    Line(){}
    Line(ll a, ll b, ll idx): a(a), b(b), idx(idx){}
    pll ask(ll 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();
    void addline(Line A)
    {
        ll Start=-inf, End=inf;
        Node *i=root;
        // cout << A.a << " " << A.b << " " << A.idx << "add\n";
        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;
        }
        // cout << "end" << endl;
    }
 
    pll query(ll x)
    {
        // cout << x << endl;
        Node *i=root;
        ll Start=-inf, End=inf;
        pll ans={inf*inf, 0};
        while (1)
        {
            // cout << Start << " " << End << " " << i->A.a << " " << i->A.b << endl;
            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;
    }
};
 
ll cost(ll j, ll i)
{
    if (to[j]>i) return 0;
    return (pre[i]-i*j)-(pre[to[j]-1]-(to[j]-1)*j);
}
 
pll solve(ll C)
{
    // cout << C << endl;
    ll crr=1;
    Lichao A; A.addline(Line(0, -pre[to[0]-1], 0));
    vector <ll> dp(n+1, inf*inf), cnt(n+1, 0); dp[0]=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;
    }
    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;
    ll 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 0 ms 348 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 0 ms 348 KB Output is correct
6 Correct 0 ms 348 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 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 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 0 ms 348 KB Output is correct
6 Correct 0 ms 348 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 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 2 ms 860 KB Output is correct
19 Correct 2 ms 860 KB Output is correct
20 Correct 2 ms 860 KB Output is correct
21 Correct 2 ms 860 KB Output is correct
22 Correct 2 ms 860 KB Output is correct
23 Correct 2 ms 860 KB Output is correct
24 Correct 2 ms 860 KB Output is correct
25 Correct 2 ms 860 KB Output is correct
26 Correct 2 ms 856 KB Output is correct
27 Correct 2 ms 852 KB Output is correct
28 Correct 2 ms 860 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 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 0 ms 348 KB Output is correct
6 Correct 0 ms 348 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 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 2 ms 860 KB Output is correct
19 Correct 2 ms 860 KB Output is correct
20 Correct 2 ms 860 KB Output is correct
21 Correct 2 ms 860 KB Output is correct
22 Correct 2 ms 860 KB Output is correct
23 Correct 2 ms 860 KB Output is correct
24 Correct 2 ms 860 KB Output is correct
25 Correct 2 ms 860 KB Output is correct
26 Correct 2 ms 856 KB Output is correct
27 Correct 2 ms 852 KB Output is correct
28 Correct 2 ms 860 KB Output is correct
29 Correct 28 ms 8384 KB Output is correct
30 Correct 29 ms 7256 KB Output is correct
31 Correct 28 ms 6948 KB Output is correct
32 Correct 26 ms 9044 KB Output is correct
33 Correct 27 ms 8540 KB Output is correct
34 Correct 28 ms 8868 KB Output is correct
35 Correct 28 ms 8796 KB Output is correct
36 Correct 35 ms 6908 KB Output is correct
37 Correct 36 ms 8016 KB Output is correct
38 Correct 30 ms 8968 KB Output is correct
39 Correct 30 ms 8080 KB Output is correct
40 Correct 28 ms 8020 KB Output is correct
41 Correct 28 ms 8016 KB Output is correct
42 Correct 15 ms 3416 KB Output is correct

Subtask #4
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 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 0 ms 348 KB Output is correct
6 Correct 0 ms 348 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 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 2 ms 860 KB Output is correct
19 Correct 2 ms 860 KB Output is correct
20 Correct 2 ms 860 KB Output is correct
21 Correct 2 ms 860 KB Output is correct
22 Correct 2 ms 860 KB Output is correct
23 Correct 2 ms 860 KB Output is correct
24 Correct 2 ms 860 KB Output is correct
25 Correct 2 ms 860 KB Output is correct
26 Correct 2 ms 856 KB Output is correct
27 Correct 2 ms 852 KB Output is correct
28 Correct 2 ms 860 KB Output is correct
29 Correct 28 ms 8384 KB Output is correct
30 Correct 29 ms 7256 KB Output is correct
31 Correct 28 ms 6948 KB Output is correct
32 Correct 26 ms 9044 KB Output is correct
33 Correct 27 ms 8540 KB Output is correct
34 Correct 28 ms 8868 KB Output is correct
35 Correct 28 ms 8796 KB Output is correct
36 Correct 35 ms 6908 KB Output is correct
37 Correct 36 ms 8016 KB Output is correct
38 Correct 30 ms 8968 KB Output is correct
39 Correct 30 ms 8080 KB Output is correct
40 Correct 28 ms 8020 KB Output is correct
41 Correct 28 ms 8016 KB Output is correct
42 Correct 15 ms 3416 KB Output is correct
43 Correct 428 ms 101788 KB Output is correct
44 Correct 827 ms 181392 KB Output is correct
45 Correct 800 ms 178552 KB Output is correct
46 Correct 699 ms 239696 KB Output is correct
47 Correct 708 ms 213736 KB Output is correct
48 Correct 845 ms 235840 KB Output is correct
49 Correct 765 ms 235756 KB Output is correct
50 Correct 802 ms 171452 KB Output is correct
51 Correct 827 ms 168664 KB Output is correct
52 Correct 813 ms 235724 KB Output is correct
53 Correct 833 ms 235724 KB Output is correct
54 Correct 844 ms 186664 KB Output is correct

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 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 0 ms 348 KB Output is correct
6 Correct 0 ms 348 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 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 2 ms 860 KB Output is correct
19 Correct 2 ms 860 KB Output is correct
20 Correct 2 ms 860 KB Output is correct
21 Correct 2 ms 860 KB Output is correct
22 Correct 2 ms 860 KB Output is correct
23 Correct 2 ms 860 KB Output is correct
24 Correct 2 ms 860 KB Output is correct
25 Correct 2 ms 860 KB Output is correct
26 Correct 2 ms 856 KB Output is correct
27 Correct 2 ms 852 KB Output is correct
28 Correct 2 ms 860 KB Output is correct
29 Correct 28 ms 8384 KB Output is correct
30 Correct 29 ms 7256 KB Output is correct
31 Correct 28 ms 6948 KB Output is correct
32 Correct 26 ms 9044 KB Output is correct
33 Correct 27 ms 8540 KB Output is correct
34 Correct 28 ms 8868 KB Output is correct
35 Correct 28 ms 8796 KB Output is correct
36 Correct 35 ms 6908 KB Output is correct
37 Correct 36 ms 8016 KB Output is correct
38 Correct 30 ms 8968 KB Output is correct
39 Correct 30 ms 8080 KB Output is correct
40 Correct 28 ms 8020 KB Output is correct
41 Correct 28 ms 8016 KB Output is correct
42 Correct 15 ms 3416 KB Output is correct
43 Correct 428 ms 101788 KB Output is correct
44 Correct 827 ms 181392 KB Output is correct
45 Correct 800 ms 178552 KB Output is correct
46 Correct 699 ms 239696 KB Output is correct
47 Correct 708 ms 213736 KB Output is correct
48 Correct 845 ms 235840 KB Output is correct
49 Correct 765 ms 235756 KB Output is correct
50 Correct 802 ms 171452 KB Output is correct
51 Correct 827 ms 168664 KB Output is correct
52 Correct 813 ms 235724 KB Output is correct
53 Correct 833 ms 235724 KB Output is correct
54 Correct 844 ms 186664 KB Output is correct
55 Runtime error 4969 ms 1048576 KB Execution killed with signal 9
56 Halted 0 ms 0 KB -