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답안 #902686

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
902686 2024-01-11T00:13:24 Z Tuanlinh123 Chorus (JOI23_chorus) C++17
87 / 100
 7000 ms 661768 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=1e6, maxn=1e6+5;
long long cnt[maxn], to[maxn];
long long n, k, 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;
    ll l=0, r=0;
};
Node LC[maxn*20];
 
struct Lichao
{
    ll crr;
    Lichao()
    {
        crr=0;
        LC[0]=Node();
    }
    inline void addline(Line A)
    {
        ll Start=0, End=inf, i=0;
        while (1)
        {
            ll mid=(Start+End)/2;
            bool l=A.ask(Start).fi<LC[i].A.ask(Start).fi;
            bool m=A.ask(mid).fi<LC[i].A.ask(mid).fi;
            if (m) swap(A, LC[i].A);
            if (A.a==inf) break;
            if (Start+1!=End)
            {
                if (l!=m)
                {
                    if (!LC[i].l)
                    {
                        LC[i].l=++crr;
                        LC[crr]=Node();
                    }
                    i=LC[i].l;
                    End=mid;
                }
                else
                {
                    if (!LC[i].r)
                    {
                        LC[i].r=++crr;
                        LC[crr]=Node();
                    }
                    i=LC[i].r;
                    Start=mid;
                }
            }
            else break;
        }
    }
 
    inline pair<long long, ll> query(long long x)
    {
        ll Start=0, End=inf, i=0;
        pair<long long, ll> ans={inf*inf, 0};
        while (1)
        {
            ll mid=(Start+End)/2;
            ans=min(ans, LC[i].A.ask(x));
            if (x<mid && LC[i].l)
            {
                i=LC[i].l;
                End=mid;
            }
            else if (x>=mid && LC[i].r)
            {
                i=LC[i].r;
                Start=mid;
            }
            else break;
        }
        return ans;
    }
};
 
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;
    }
    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;
    long long 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=1LL*n*n;
    while (hi>lo)
    {
        long long mid=(lo+hi)/2;
        if (solve(mid).se<=k)
            hi=mid;
        else lo=mid+1;
    }
    cout << 0LL+solve(lo).fi-lo*k;
}

Subtask #1
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 186 ms 626616 KB Output is correct
2 Correct 168 ms 626616 KB Output is correct
3 Correct 164 ms 626564 KB Output is correct
4 Correct 192 ms 626516 KB Output is correct
5 Correct 168 ms 626708 KB Output is correct
6 Correct 213 ms 632712 KB Output is correct
7 Correct 177 ms 626524 KB Output is correct
8 Correct 165 ms 626524 KB Output is correct
9 Correct 178 ms 626504 KB Output is correct
10 Correct 174 ms 626736 KB Output is correct
11 Correct 175 ms 626516 KB Output is correct
12 Correct 176 ms 626624 KB Output is correct
13 Correct 169 ms 626528 KB Output is correct
14 Correct 167 ms 626692 KB Output is correct
15 Correct 177 ms 626624 KB Output is correct
16 Correct 167 ms 626668 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 186 ms 626616 KB Output is correct
2 Correct 168 ms 626616 KB Output is correct
3 Correct 164 ms 626564 KB Output is correct
4 Correct 192 ms 626516 KB Output is correct
5 Correct 168 ms 626708 KB Output is correct
6 Correct 213 ms 632712 KB Output is correct
7 Correct 177 ms 626524 KB Output is correct
8 Correct 165 ms 626524 KB Output is correct
9 Correct 178 ms 626504 KB Output is correct
10 Correct 174 ms 626736 KB Output is correct
11 Correct 175 ms 626516 KB Output is correct
12 Correct 176 ms 626624 KB Output is correct
13 Correct 169 ms 626528 KB Output is correct
14 Correct 167 ms 626692 KB Output is correct
15 Correct 177 ms 626624 KB Output is correct
16 Correct 167 ms 626668 KB Output is correct
17 Correct 180 ms 626512 KB Output is correct
18 Correct 176 ms 626872 KB Output is correct
19 Correct 169 ms 626516 KB Output is correct
20 Correct 171 ms 626512 KB Output is correct
21 Correct 167 ms 626532 KB Output is correct
22 Correct 166 ms 626508 KB Output is correct
23 Correct 158 ms 626684 KB Output is correct
24 Correct 174 ms 626684 KB Output is correct
25 Correct 182 ms 626516 KB Output is correct
26 Correct 189 ms 626512 KB Output is correct
27 Correct 175 ms 626712 KB Output is correct
28 Correct 167 ms 626516 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 186 ms 626616 KB Output is correct
2 Correct 168 ms 626616 KB Output is correct
3 Correct 164 ms 626564 KB Output is correct
4 Correct 192 ms 626516 KB Output is correct
5 Correct 168 ms 626708 KB Output is correct
6 Correct 213 ms 632712 KB Output is correct
7 Correct 177 ms 626524 KB Output is correct
8 Correct 165 ms 626524 KB Output is correct
9 Correct 178 ms 626504 KB Output is correct
10 Correct 174 ms 626736 KB Output is correct
11 Correct 175 ms 626516 KB Output is correct
12 Correct 176 ms 626624 KB Output is correct
13 Correct 169 ms 626528 KB Output is correct
14 Correct 167 ms 626692 KB Output is correct
15 Correct 177 ms 626624 KB Output is correct
16 Correct 167 ms 626668 KB Output is correct
17 Correct 180 ms 626512 KB Output is correct
18 Correct 176 ms 626872 KB Output is correct
19 Correct 169 ms 626516 KB Output is correct
20 Correct 171 ms 626512 KB Output is correct
21 Correct 167 ms 626532 KB Output is correct
22 Correct 166 ms 626508 KB Output is correct
23 Correct 158 ms 626684 KB Output is correct
24 Correct 174 ms 626684 KB Output is correct
25 Correct 182 ms 626516 KB Output is correct
26 Correct 189 ms 626512 KB Output is correct
27 Correct 175 ms 626712 KB Output is correct
28 Correct 167 ms 626516 KB Output is correct
29 Correct 199 ms 626772 KB Output is correct
30 Correct 180 ms 626768 KB Output is correct
31 Correct 189 ms 626888 KB Output is correct
32 Correct 184 ms 626772 KB Output is correct
33 Correct 199 ms 626768 KB Output is correct
34 Correct 182 ms 626772 KB Output is correct
35 Correct 191 ms 626856 KB Output is correct
36 Correct 189 ms 626816 KB Output is correct
37 Correct 184 ms 626768 KB Output is correct
38 Correct 188 ms 626744 KB Output is correct
39 Correct 202 ms 626680 KB Output is correct
40 Correct 197 ms 626888 KB Output is correct
41 Correct 196 ms 626824 KB Output is correct
42 Correct 174 ms 626688 KB Output is correct

Subtask #4
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 186 ms 626616 KB Output is correct
2 Correct 168 ms 626616 KB Output is correct
3 Correct 164 ms 626564 KB Output is correct
4 Correct 192 ms 626516 KB Output is correct
5 Correct 168 ms 626708 KB Output is correct
6 Correct 213 ms 632712 KB Output is correct
7 Correct 177 ms 626524 KB Output is correct
8 Correct 165 ms 626524 KB Output is correct
9 Correct 178 ms 626504 KB Output is correct
10 Correct 174 ms 626736 KB Output is correct
11 Correct 175 ms 626516 KB Output is correct
12 Correct 176 ms 626624 KB Output is correct
13 Correct 169 ms 626528 KB Output is correct
14 Correct 167 ms 626692 KB Output is correct
15 Correct 177 ms 626624 KB Output is correct
16 Correct 167 ms 626668 KB Output is correct
17 Correct 180 ms 626512 KB Output is correct
18 Correct 176 ms 626872 KB Output is correct
19 Correct 169 ms 626516 KB Output is correct
20 Correct 171 ms 626512 KB Output is correct
21 Correct 167 ms 626532 KB Output is correct
22 Correct 166 ms 626508 KB Output is correct
23 Correct 158 ms 626684 KB Output is correct
24 Correct 174 ms 626684 KB Output is correct
25 Correct 182 ms 626516 KB Output is correct
26 Correct 189 ms 626512 KB Output is correct
27 Correct 175 ms 626712 KB Output is correct
28 Correct 167 ms 626516 KB Output is correct
29 Correct 199 ms 626772 KB Output is correct
30 Correct 180 ms 626768 KB Output is correct
31 Correct 189 ms 626888 KB Output is correct
32 Correct 184 ms 626772 KB Output is correct
33 Correct 199 ms 626768 KB Output is correct
34 Correct 182 ms 626772 KB Output is correct
35 Correct 191 ms 626856 KB Output is correct
36 Correct 189 ms 626816 KB Output is correct
37 Correct 184 ms 626768 KB Output is correct
38 Correct 188 ms 626744 KB Output is correct
39 Correct 202 ms 626680 KB Output is correct
40 Correct 197 ms 626888 KB Output is correct
41 Correct 196 ms 626824 KB Output is correct
42 Correct 174 ms 626688 KB Output is correct
43 Correct 510 ms 628920 KB Output is correct
44 Correct 818 ms 630236 KB Output is correct
45 Correct 784 ms 630152 KB Output is correct
46 Correct 554 ms 630300 KB Output is correct
47 Correct 670 ms 630200 KB Output is correct
48 Correct 770 ms 630148 KB Output is correct
49 Correct 784 ms 630308 KB Output is correct
50 Correct 765 ms 630240 KB Output is correct
51 Correct 803 ms 630272 KB Output is correct
52 Correct 797 ms 630388 KB Output is correct
53 Correct 765 ms 630372 KB Output is correct
54 Correct 834 ms 630260 KB Output is correct

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 186 ms 626616 KB Output is correct
2 Correct 168 ms 626616 KB Output is correct
3 Correct 164 ms 626564 KB Output is correct
4 Correct 192 ms 626516 KB Output is correct
5 Correct 168 ms 626708 KB Output is correct
6 Correct 213 ms 632712 KB Output is correct
7 Correct 177 ms 626524 KB Output is correct
8 Correct 165 ms 626524 KB Output is correct
9 Correct 178 ms 626504 KB Output is correct
10 Correct 174 ms 626736 KB Output is correct
11 Correct 175 ms 626516 KB Output is correct
12 Correct 176 ms 626624 KB Output is correct
13 Correct 169 ms 626528 KB Output is correct
14 Correct 167 ms 626692 KB Output is correct
15 Correct 177 ms 626624 KB Output is correct
16 Correct 167 ms 626668 KB Output is correct
17 Correct 180 ms 626512 KB Output is correct
18 Correct 176 ms 626872 KB Output is correct
19 Correct 169 ms 626516 KB Output is correct
20 Correct 171 ms 626512 KB Output is correct
21 Correct 167 ms 626532 KB Output is correct
22 Correct 166 ms 626508 KB Output is correct
23 Correct 158 ms 626684 KB Output is correct
24 Correct 174 ms 626684 KB Output is correct
25 Correct 182 ms 626516 KB Output is correct
26 Correct 189 ms 626512 KB Output is correct
27 Correct 175 ms 626712 KB Output is correct
28 Correct 167 ms 626516 KB Output is correct
29 Correct 199 ms 626772 KB Output is correct
30 Correct 180 ms 626768 KB Output is correct
31 Correct 189 ms 626888 KB Output is correct
32 Correct 184 ms 626772 KB Output is correct
33 Correct 199 ms 626768 KB Output is correct
34 Correct 182 ms 626772 KB Output is correct
35 Correct 191 ms 626856 KB Output is correct
36 Correct 189 ms 626816 KB Output is correct
37 Correct 184 ms 626768 KB Output is correct
38 Correct 188 ms 626744 KB Output is correct
39 Correct 202 ms 626680 KB Output is correct
40 Correct 197 ms 626888 KB Output is correct
41 Correct 196 ms 626824 KB Output is correct
42 Correct 174 ms 626688 KB Output is correct
43 Correct 510 ms 628920 KB Output is correct
44 Correct 818 ms 630236 KB Output is correct
45 Correct 784 ms 630152 KB Output is correct
46 Correct 554 ms 630300 KB Output is correct
47 Correct 670 ms 630200 KB Output is correct
48 Correct 770 ms 630148 KB Output is correct
49 Correct 784 ms 630308 KB Output is correct
50 Correct 765 ms 630240 KB Output is correct
51 Correct 803 ms 630272 KB Output is correct
52 Correct 797 ms 630388 KB Output is correct
53 Correct 765 ms 630372 KB Output is correct
54 Correct 834 ms 630260 KB Output is correct
55 Correct 4675 ms 649508 KB Output is correct
56 Execution timed out 7100 ms 661768 KB Time limit exceeded
57 Halted 0 ms 0 KB -