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답안 #1007259

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1007259 2024-06-24T14:08:01 Z snpmrnhlol Chorus (JOI23_chorus) C++17
100 / 100
 1682 ms 58416 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e6;
const ll inf = 1e18;
char v[N*2];
int v2[N],v3[N];
ll ps[N + 1];
pair<ll,int> dp[N + 1];
int n,k;
int cnt = 0,cnt2 = 0;
struct line{
    ll k,b;
    int id;
};
bool check(line a,line b,line c){
    return (a.b - b.b)*(b.k - c.k) <= (b.b - c.b)*(a.k - b.k);
}
struct CHT{
    vector <line> cht;
    int sz = 0, pt = 0;
    void init(){
        cht.clear();
        sz = 0;
        pt = 0;
    }
    void add(ll k,ll b,int id){
        while(sz >= 2 && check(cht[sz - 2],cht[sz - 1],{k,b,id})){
            cht.pop_back();
            sz--;
        }
        cht.push_back({k,b,id});
        pt = min(pt,sz - 1);
        sz++;
    }
    pair<ll,int> get(int x){
        assert(sz != 0);
        pt = max(pt,0);
        while(pt < sz - 1 && x > -(cht[pt].b - cht[pt + 1].b)/(cht[pt].k - cht[pt + 1].k)){
            pt++;
        }
        return {cht[pt].k*x + cht[pt].b,cht[pt].id};
    }
};
CHT cht;
pair <ll,int> check(ll x){
    dp[0] = {0,0};
    cht.init();
    int pt = 0;
    for(int i = 1;i <= n;i++){
        dp[i] = {inf,0};
        while(pt < i && max(v2[pt],pt) < i){
            cht.add(-pt,dp[pt].first + x - 1ll*max(v2[pt],pt)*(n - pt) + ps[max(v2[pt],pt)],dp[pt].second);
            pt++;
        }
        if(pt != i){
            dp[i] = min(dp[i],{dp[pt].first + x,dp[pt].second + 1});
        }
        if(cht.sz != 0){
            auto id = cht.get(i);
            dp[i] = min(dp[i],{id.first + 1ll*i*n - ps[i],id.second + 1});
        }
    }
    return dp[n];
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>k;
    for(int i = 0;i < 2*n;i++){
        cin>>v[i];
        if(v[i] == 'B'){
            v2[cnt] = i - cnt;
            cnt++;
        }
        if(v[i] == 'A'){
            v3[cnt2] = i - cnt2;
            cnt2++;
        }
    }
    for(int i = 1;i <= n;i++){
        ps[i] = ps[i - 1] + (n - v3[i - 1]);
    }
    ll l = 0,r = inf;
    ll ans = 0;
    while(l != r){
        ll mij = (l + r)/2;
        auto x = check(mij);
        if(x.second >= k){
            l = mij + 1;
        }else{
            r = mij;
        }
    }
    check(l);
    ans = dp[n].first - k*l;
    cout<<ans;
    return 0;
}

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 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 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 6596 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6488 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 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 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 6596 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6488 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 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 1 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6488 KB Output is correct
22 Correct 1 ms 6488 KB Output is correct
23 Correct 1 ms 6492 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6636 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 1 ms 6492 KB Output is correct
28 Correct 2 ms 6636 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 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 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 6596 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6488 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 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 1 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6488 KB Output is correct
22 Correct 1 ms 6488 KB Output is correct
23 Correct 1 ms 6492 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6636 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 1 ms 6492 KB Output is correct
28 Correct 2 ms 6636 KB Output is correct
29 Correct 6 ms 7004 KB Output is correct
30 Correct 8 ms 6744 KB Output is correct
31 Correct 8 ms 6748 KB Output is correct
32 Correct 6 ms 6748 KB Output is correct
33 Correct 6 ms 6748 KB Output is correct
34 Correct 7 ms 7004 KB Output is correct
35 Correct 6 ms 7004 KB Output is correct
36 Correct 8 ms 6744 KB Output is correct
37 Correct 8 ms 6748 KB Output is correct
38 Correct 6 ms 7004 KB Output is correct
39 Correct 7 ms 6900 KB Output is correct
40 Correct 6 ms 6748 KB Output is correct
41 Correct 6 ms 6744 KB Output is correct
42 Correct 4 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 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 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 6596 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6488 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 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 1 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6488 KB Output is correct
22 Correct 1 ms 6488 KB Output is correct
23 Correct 1 ms 6492 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6636 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 1 ms 6492 KB Output is correct
28 Correct 2 ms 6636 KB Output is correct
29 Correct 6 ms 7004 KB Output is correct
30 Correct 8 ms 6744 KB Output is correct
31 Correct 8 ms 6748 KB Output is correct
32 Correct 6 ms 6748 KB Output is correct
33 Correct 6 ms 6748 KB Output is correct
34 Correct 7 ms 7004 KB Output is correct
35 Correct 6 ms 7004 KB Output is correct
36 Correct 8 ms 6744 KB Output is correct
37 Correct 8 ms 6748 KB Output is correct
38 Correct 6 ms 7004 KB Output is correct
39 Correct 7 ms 6900 KB Output is correct
40 Correct 6 ms 6748 KB Output is correct
41 Correct 6 ms 6744 KB Output is correct
42 Correct 4 ms 6748 KB Output is correct
43 Correct 94 ms 10080 KB Output is correct
44 Correct 159 ms 10608 KB Output is correct
45 Correct 167 ms 11212 KB Output is correct
46 Correct 114 ms 8796 KB Output is correct
47 Correct 103 ms 11280 KB Output is correct
48 Correct 101 ms 12744 KB Output is correct
49 Correct 99 ms 12740 KB Output is correct
50 Correct 159 ms 11212 KB Output is correct
51 Correct 163 ms 11080 KB Output is correct
52 Correct 103 ms 12160 KB Output is correct
53 Correct 99 ms 12744 KB Output is correct
54 Correct 167 ms 11208 KB Output is correct

Subtask #5
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 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 6596 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6488 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 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 1 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6488 KB Output is correct
22 Correct 1 ms 6488 KB Output is correct
23 Correct 1 ms 6492 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6636 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 1 ms 6492 KB Output is correct
28 Correct 2 ms 6636 KB Output is correct
29 Correct 6 ms 7004 KB Output is correct
30 Correct 8 ms 6744 KB Output is correct
31 Correct 8 ms 6748 KB Output is correct
32 Correct 6 ms 6748 KB Output is correct
33 Correct 6 ms 6748 KB Output is correct
34 Correct 7 ms 7004 KB Output is correct
35 Correct 6 ms 7004 KB Output is correct
36 Correct 8 ms 6744 KB Output is correct
37 Correct 8 ms 6748 KB Output is correct
38 Correct 6 ms 7004 KB Output is correct
39 Correct 7 ms 6900 KB Output is correct
40 Correct 6 ms 6748 KB Output is correct
41 Correct 6 ms 6744 KB Output is correct
42 Correct 4 ms 6748 KB Output is correct
43 Correct 94 ms 10080 KB Output is correct
44 Correct 159 ms 10608 KB Output is correct
45 Correct 167 ms 11212 KB Output is correct
46 Correct 114 ms 8796 KB Output is correct
47 Correct 103 ms 11280 KB Output is correct
48 Correct 101 ms 12744 KB Output is correct
49 Correct 99 ms 12740 KB Output is correct
50 Correct 159 ms 11212 KB Output is correct
51 Correct 163 ms 11080 KB Output is correct
52 Correct 103 ms 12160 KB Output is correct
53 Correct 99 ms 12744 KB Output is correct
54 Correct 167 ms 11208 KB Output is correct
55 Correct 1012 ms 37872 KB Output is correct
56 Correct 1278 ms 58280 KB Output is correct
57 Correct 1614 ms 46392 KB Output is correct
58 Correct 1106 ms 33632 KB Output is correct
59 Correct 992 ms 46016 KB Output is correct
60 Correct 928 ms 58276 KB Output is correct
61 Correct 943 ms 58364 KB Output is correct
62 Correct 1591 ms 46012 KB Output is correct
63 Correct 1682 ms 46136 KB Output is correct
64 Correct 937 ms 58416 KB Output is correct
65 Correct 988 ms 58272 KB Output is correct
66 Correct 1628 ms 46008 KB Output is correct
67 Correct 980 ms 58248 KB Output is correct