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답안 #902749

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
902749 2024-01-11T02:05:05 Z Tuanlinh123 Chorus (JOI23_chorus) C++17
87 / 100
 7000 ms 94352 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=LLONG_MAX, maxn=1e6+5;
long long cnt[maxn], to[maxn];
long long n, k, dp[maxn], pre[maxn];
 
struct Line
{
    mutable long long k, m, p, idx;
    bool operator < (const Line &o) const{return k<o.k;}
    bool operator < (long long o) const {return p<o;} 
};

struct CHT: multiset<Line, less<>>
{
    long long floordiv(long long a, long long b){return a/b-(((a^b)<0) && (a%b));}
    bool isect(iterator x, iterator y)
    {
        if (y==end())
        {
            x->p=inf;
            return false;
        }
        if (x->k==y->k) x->p=x->m>y->m ? inf:-inf;
        else x->p=floordiv(x->m-y->m, y->k-x->k);
        return x->p>=y->p;
    }
    void add(long long k, long long m, ll idx)
    {
        k = -k, m = -m;
        auto z=insert({k, m, 0, idx}), y=z++, x=y;
        while (isect(y, z)) z=erase(z);
        if (x!=begin() && isect(--x, y)) isect(x, y=erase(y));
        while ((y=x)!=begin() && ((--x)->p)>=y->p) isect(x, erase(y)); 
    }
    pair<long long, ll> query(ll x)
    {
        auto L=*lower_bound(x);
        return {-L.k*x-L.m, L.idx};
    }
};
 
pair<long long, ll> solve(long long C)
{
    ll crr=1;
    CHT A; A.add(0, -pre[to[0]-1], 0);
    for (ll i=1; i<=n; i++)
        dp[i]=inf, cnt[i]=0;
    for (ll i=1; i<=n; i++)
    {
        while (crr<i && to[crr]<=i)
            A.add(-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 1 ms 6488 KB Output is correct
2 Correct 2 ms 6504 KB Output is correct
3 Correct 2 ms 6504 KB Output is correct
4 Correct 1 ms 6504 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6496 KB Output is correct
10 Correct 1 ms 6504 KB Output is correct
11 Correct 1 ms 6504 KB Output is correct
12 Correct 1 ms 6504 KB Output is correct
13 Correct 1 ms 6504 KB Output is correct
14 Correct 1 ms 6504 KB Output is correct
15 Correct 1 ms 6620 KB Output is correct
16 Correct 1 ms 6508 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 2 ms 6504 KB Output is correct
3 Correct 2 ms 6504 KB Output is correct
4 Correct 1 ms 6504 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6496 KB Output is correct
10 Correct 1 ms 6504 KB Output is correct
11 Correct 1 ms 6504 KB Output is correct
12 Correct 1 ms 6504 KB Output is correct
13 Correct 1 ms 6504 KB Output is correct
14 Correct 1 ms 6504 KB Output is correct
15 Correct 1 ms 6620 KB Output is correct
16 Correct 1 ms 6508 KB Output is correct
17 Correct 1 ms 6744 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6500 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6648 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6488 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 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 2 ms 6504 KB Output is correct
3 Correct 2 ms 6504 KB Output is correct
4 Correct 1 ms 6504 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6496 KB Output is correct
10 Correct 1 ms 6504 KB Output is correct
11 Correct 1 ms 6504 KB Output is correct
12 Correct 1 ms 6504 KB Output is correct
13 Correct 1 ms 6504 KB Output is correct
14 Correct 1 ms 6504 KB Output is correct
15 Correct 1 ms 6620 KB Output is correct
16 Correct 1 ms 6508 KB Output is correct
17 Correct 1 ms 6744 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6500 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6648 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6488 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 15 ms 7004 KB Output is correct
30 Correct 15 ms 6748 KB Output is correct
31 Correct 21 ms 6744 KB Output is correct
32 Correct 13 ms 6688 KB Output is correct
33 Correct 12 ms 6748 KB Output is correct
34 Correct 15 ms 6872 KB Output is correct
35 Correct 20 ms 7016 KB Output is correct
36 Correct 17 ms 6844 KB Output is correct
37 Correct 17 ms 6760 KB Output is correct
38 Correct 15 ms 7016 KB Output is correct
39 Correct 17 ms 6760 KB Output is correct
40 Correct 12 ms 6788 KB Output is correct
41 Correct 12 ms 6748 KB Output is correct
42 Correct 7 ms 6748 KB Output is correct

Subtask #4
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 2 ms 6504 KB Output is correct
3 Correct 2 ms 6504 KB Output is correct
4 Correct 1 ms 6504 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6496 KB Output is correct
10 Correct 1 ms 6504 KB Output is correct
11 Correct 1 ms 6504 KB Output is correct
12 Correct 1 ms 6504 KB Output is correct
13 Correct 1 ms 6504 KB Output is correct
14 Correct 1 ms 6504 KB Output is correct
15 Correct 1 ms 6620 KB Output is correct
16 Correct 1 ms 6508 KB Output is correct
17 Correct 1 ms 6744 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6500 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6648 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6488 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 15 ms 7004 KB Output is correct
30 Correct 15 ms 6748 KB Output is correct
31 Correct 21 ms 6744 KB Output is correct
32 Correct 13 ms 6688 KB Output is correct
33 Correct 12 ms 6748 KB Output is correct
34 Correct 15 ms 6872 KB Output is correct
35 Correct 20 ms 7016 KB Output is correct
36 Correct 17 ms 6844 KB Output is correct
37 Correct 17 ms 6760 KB Output is correct
38 Correct 15 ms 7016 KB Output is correct
39 Correct 17 ms 6760 KB Output is correct
40 Correct 12 ms 6788 KB Output is correct
41 Correct 12 ms 6748 KB Output is correct
42 Correct 7 ms 6748 KB Output is correct
43 Correct 265 ms 11492 KB Output is correct
44 Correct 505 ms 15312 KB Output is correct
45 Correct 501 ms 15188 KB Output is correct
46 Correct 328 ms 15076 KB Output is correct
47 Correct 401 ms 15328 KB Output is correct
48 Correct 527 ms 18908 KB Output is correct
49 Correct 537 ms 19104 KB Output is correct
50 Correct 476 ms 14200 KB Output is correct
51 Correct 513 ms 14300 KB Output is correct
52 Correct 556 ms 19060 KB Output is correct
53 Correct 555 ms 19184 KB Output is correct
54 Correct 489 ms 14716 KB Output is correct

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 2 ms 6504 KB Output is correct
3 Correct 2 ms 6504 KB Output is correct
4 Correct 1 ms 6504 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6496 KB Output is correct
10 Correct 1 ms 6504 KB Output is correct
11 Correct 1 ms 6504 KB Output is correct
12 Correct 1 ms 6504 KB Output is correct
13 Correct 1 ms 6504 KB Output is correct
14 Correct 1 ms 6504 KB Output is correct
15 Correct 1 ms 6620 KB Output is correct
16 Correct 1 ms 6508 KB Output is correct
17 Correct 1 ms 6744 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6500 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6648 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6488 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 15 ms 7004 KB Output is correct
30 Correct 15 ms 6748 KB Output is correct
31 Correct 21 ms 6744 KB Output is correct
32 Correct 13 ms 6688 KB Output is correct
33 Correct 12 ms 6748 KB Output is correct
34 Correct 15 ms 6872 KB Output is correct
35 Correct 20 ms 7016 KB Output is correct
36 Correct 17 ms 6844 KB Output is correct
37 Correct 17 ms 6760 KB Output is correct
38 Correct 15 ms 7016 KB Output is correct
39 Correct 17 ms 6760 KB Output is correct
40 Correct 12 ms 6788 KB Output is correct
41 Correct 12 ms 6748 KB Output is correct
42 Correct 7 ms 6748 KB Output is correct
43 Correct 265 ms 11492 KB Output is correct
44 Correct 505 ms 15312 KB Output is correct
45 Correct 501 ms 15188 KB Output is correct
46 Correct 328 ms 15076 KB Output is correct
47 Correct 401 ms 15328 KB Output is correct
48 Correct 527 ms 18908 KB Output is correct
49 Correct 537 ms 19104 KB Output is correct
50 Correct 476 ms 14200 KB Output is correct
51 Correct 513 ms 14300 KB Output is correct
52 Correct 556 ms 19060 KB Output is correct
53 Correct 555 ms 19184 KB Output is correct
54 Correct 489 ms 14716 KB Output is correct
55 Correct 4646 ms 57264 KB Output is correct
56 Execution timed out 7098 ms 94352 KB Time limit exceeded
57 Halted 0 ms 0 KB -