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답안 #1018108

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1018108 2024-07-09T14:30:17 Z bachhoangxuan Modern Machine (JOI23_ho_t5) C++17
15 / 100
 389 ms 387152 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define mpp make_pair
#define fi first
#define se second
const int maxn = 120005;
const int LOG = 18;

int f(int x){
    return (x?32-__builtin_clz(x):0);
}
int n,m,q,a[maxn];
char s[maxn];

vector<pii> T[maxn];
void build(int l,int r,int id){
    if(l==r){
        int x=a[l];
        if(x==n) T[id]={{n-1,0},{n,-1}};
        else if(n-x-1<x-1) T[id]={{n-x-1,x+1},{x-1,x-n},{n,x-n-1}};
        else T[id]={{x-1,x+1},{n-x,x},{n,x-n-1}};
        return;
    }
    int mid=(l+r)>>1;
    build(l,mid,id<<1);build(mid+1,r,id<<1|1);
    int lt=0;
    for(auto [rt,val]:T[id<<1]){
        int pl=lower_bound(T[id<<1|1].begin(),T[id<<1|1].end(),mpp(lt+val,INT_MIN))-T[id<<1|1].begin();
        int pr=lower_bound(T[id<<1|1].begin(),T[id<<1|1].end(),mpp(rt+val,INT_MIN))-T[id<<1|1].begin();
        for(int i=pl;i<=pr;i++){
            auto [lst,nval]=T[id<<1|1][i];
            int pos=min(lst-val,rt);
            T[id].push_back({pos,val+nval});
        }
        lt=rt+1;
    }
}
int query(int l,int r,int id,int tl,int tr,int t){
    if(tr<l || r<tl) return t;
    if(tl<=l && r<=tr){
        auto it=lower_bound(T[id].begin(),T[id].end(),mpp(t,INT_MIN));
        return t+it->se;
    }
    int mid=(l+r)>>1;
    return query(mid+1,r,id<<1|1,tl,tr,query(l,mid,id<<1,tl,tr,t));
}



int nxt[LOG][LOG][maxn],cnt[maxn];
ll ca[LOG][maxn],cb[LOG][maxn];
int pa[maxn],sa,pb[maxn],sb;

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    cin >> n >> m;
    for(int i=1;i<=n;i++) cin >> s[i];
    for(int i=1;i<=m;i++) cin >> a[i];
    for(int i=1;i<=n+1;i++) if(s[i]!='R') pa[++sa]=i-1;
    for(int i=n;i>=0;i--) if(s[i]!='B') pb[++sb]=n-i;
    for(int i=1;i<=n;i++) cnt[i]=cnt[i-1]+(s[i]=='B');
    for(int x=0;x<LOG;x++){
        int X=(x?(1<<(x-1)):0);
        for(int y=0;y<LOG;y++){
            int Y=(y?(1<<(y-1)):0);
            nxt[x][y][m+1]=m+1;
            for(int i=m;i>=1;i--) nxt[x][y][i]=(X<a[i] || a[i]<=n-Y)?i:nxt[x][y][i+1];
        }
        for(int i=1;i<=m;i++){
            ca[x][i]=(a[i]<=X?a[i]:0)+ca[x][i-1];
            cb[x][i]=(a[i]>n-X?n-a[i]:0)+cb[x][i-1];
        }
    }
    build(1,m,1);
    cin >> q;
    for(int i=1;i<=q;i++){
        int l,r;cin >> l >> r;
        int ta=1,tb=1,t=-1;
        while(true){
            auto g = [&](int x){
                if(x<=pa[ta]) return 0;
                else if(x>n-pb[tb]) return 1;
                else return (int)(s[x]=='B');
            };
            int xa=f(pa[ta]),xb=f(pb[tb]);
            int i=min(nxt[xa][xb][l],r+1);
            int da=min(ca[xa][i-1]-ca[xa][l-1],1LL*n);
            int db=min(cb[xb][i-1]-cb[xb][l-1],1LL*n);
            //cout << i << ' ' << da << ' ' << db << ' ' << pa[ta] << ' ' << pb[tb] << '\n';
            if(pa[min(sa,ta+da)]+pb[min(sb,tb+db)]<n){
                ta+=da,tb+=db;
                if(i==r+1) break;
                int bc=cnt[n-pb[tb]]-cnt[pa[ta]]+pb[tb],x=a[i]+g(a[i]);
                //cout << x << ' ' << bc << '\n';
                if(x<=bc){
                    if(x>=bc-pb[tb]){t=n-bc+x,l=i+1;break;}
                    else ta+=x;
                }
                else{
                    x=n-a[i]+(g(a[i])^1);
                    if(x>=n-bc-pa[ta]){
                        t=n-bc-x,l=i+1;
                        break;
                    }
                    else tb+=x;
                }
            }
            else{
                int lt=l,rt=i-1;
                while(lt<rt){
                    int mid=(lt+rt)>>1;
                    int da=min(ca[xa][mid]-ca[xa][l-1],1LL*n);
                    int db=min(cb[xb][mid]-cb[xb][l-1],1LL*n);
                    if(pa[min(sa,ta+da)]+pb[min(sb,tb+db)]<n) lt=mid+1;
                    else rt=mid;
                }
                int da=min(ca[xa][lt-1]-ca[xa][l-1],1LL*n);
                int db=min(cb[xb][lt-1]-cb[xb][l-1],1LL*n);
                ta+=da;tb+=db;l=lt+1;
                int bc=cnt[n-pb[tb]]-cnt[pa[ta]]+pb[tb],x=a[i]+g(a[i]);
                if(x<=bc) t=n-bc+x;
                else t=n-bc-(n-a[i]+(g(a[i])^1));
                break;
            }
            l=i+1;
        }
        //cout << t << ' ' << pb[tb] << ' ' << pa[ta] << '\n';
        if(t==-1) cout << n-pb[tb]-(cnt[n-pb[tb]]-cnt[pa[ta]]) << '\n';
        else cout << query(1,m,1,l,r,t) << '\n';
    }
}

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 4 ms 5468 KB Output is correct
8 Correct 2 ms 5464 KB Output is correct
9 Correct 4 ms 5060 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 4 ms 5468 KB Output is correct
8 Correct 2 ms 5464 KB Output is correct
9 Correct 4 ms 5060 KB Output is correct
10 Correct 15 ms 48240 KB Output is correct
11 Correct 15 ms 25768 KB Output is correct
12 Correct 19 ms 17996 KB Output is correct
13 Correct 13 ms 16472 KB Output is correct
14 Correct 15 ms 17752 KB Output is correct

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 4 ms 5468 KB Output is correct
8 Correct 2 ms 5464 KB Output is correct
9 Correct 4 ms 5060 KB Output is correct
10 Correct 15 ms 48240 KB Output is correct
11 Correct 15 ms 25768 KB Output is correct
12 Correct 19 ms 17996 KB Output is correct
13 Correct 13 ms 16472 KB Output is correct
14 Correct 15 ms 17752 KB Output is correct
15 Correct 2 ms 4952 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 5080 KB Output is correct
18 Runtime error 389 ms 387152 KB Execution killed with signal 11
19 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5724 KB Output is correct
2 Runtime error 317 ms 384756 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5724 KB Output is correct
2 Runtime error 317 ms 384756 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5724 KB Output is correct
2 Runtime error 317 ms 384756 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 4 ms 5468 KB Output is correct
8 Correct 2 ms 5464 KB Output is correct
9 Correct 4 ms 5060 KB Output is correct
10 Correct 15 ms 48240 KB Output is correct
11 Correct 15 ms 25768 KB Output is correct
12 Correct 19 ms 17996 KB Output is correct
13 Correct 13 ms 16472 KB Output is correct
14 Correct 15 ms 17752 KB Output is correct
15 Correct 2 ms 4952 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 5080 KB Output is correct
18 Runtime error 389 ms 387152 KB Execution killed with signal 11
19 Halted 0 ms 0 KB -