Submission #999906

#	Time	Username	Problem	Language	Result	Execution time	Memory
999906		Unforgettablepl	Sweeping (JOI20_sweeping)	C++17	11 / 100	1777 ms	62292 KiB

sweeping

#include <bits/stdc++.h>
using namespace std;

#define int long long

int treeX[6000001];
int treeY[6000001];
int arrX[1500001];
int arrY[1500001];
int M;

void updatelazy(int qL,int qR,int qX,int *tree,int x=1,int L=1,int R=M){
    if(qR<L or R<qL)return;
    if(qL<=L and R<=qR){
        tree[x] = max(tree[x],qX);
        return;
    }
    int mid = (L+R)/2;
    updatelazy(qL,qR,qX,tree,2*x,L,mid);
    updatelazy(qL,qR,qX,tree,2*x+1,mid+1,R);
}

void propagate(int qX,int *arr,int *tree,int x=1,int L=1,int R=M){
    if(qX<L or R<qX)return;
    if(tree[x]){
        if(L==R)arr[L]=max(arr[L],tree[x]);
        else {
            tree[2*x] = max(tree[2*x],tree[x]);
            tree[2*x+1] = max(tree[2*x+1],tree[x]);
        }
        tree[x]=0;
    }
    if(L==R)return;
    int mid = (L+R)/2;
    propagate(qX,arr,tree,2*x,L,mid);
    propagate(qX,arr,tree,2*x+1,mid+1,R);
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n,m,q;
    cin >> n >> m >> q;
    vector<pair<int,int>> dusts(m+1);
    for(int i=1;i<=m;i++)cin>>dusts[i].first>>dusts[i].second;
    M = m;
    for(int i=1;i<=m;i++){
        updatelazy(i,i,dusts[i].first,treeX);
        updatelazy(i,i,dusts[i].second,treeY);
    }
    for(int i=1;i<=q;i++){
        int type;cin>>type;
        if(type==1){
            int x;cin>>x;
            propagate(x,arrX,treeX);
            propagate(x,arrY,treeY);
            cout << arrX[x] << ' ' << arrY[x] << '\n';
        } else if(type==2){
            int l;cin>>l;
            int last = m+1;
            for(int jump=262144;jump;jump/=2){
                if(last-jump<=0)continue;
                propagate(last-jump,arrY,treeY);
                if(arrY[last-jump]<=l)last-=jump;
            }
            if(last<=m)updatelazy(last,m,n-l,treeX);
        } else {
            int l;cin>>l;
            int last = 0;
            for(int jump=262144;jump;jump/=2){
                if(last+jump>m)continue;
                propagate(last+jump,arrX,treeX);
                if(arrX[last+jump]<=l)last+=jump;
            }
            if(last)updatelazy(1,last,n-l,treeY);
        }
    }
}

• Subtask 1: 0 / 1
• Subtask 2: 0 / 10
• Subtask 3: 11 / 11
• Subtask 4: 0 / 53
• Subtask 5: 0 / 25