Submission #259807

#	Time	Username	Problem	Language	Result	Execution time	Memory
259807		shayan_p	Sweeping (JOI20_sweeping)	C++14	1 / 100	17139 ms	2097156 KiB

sweeping

// And you curse yourself for things you never done
 
#include<bits/stdc++.h>
 
#define F first
#define S second
#define PB push_back
#define sz(s) int((s).size())
#define bit(n,k) (((n)>>(k))&1)
 
using namespace std;
 
typedef long long ll;
typedef pair<int,int> pii;
 
const int maxn = 1e6 + 10, mod = 1e9 + 7, inf = 1e9 + 10;
 
struct node{
    map<int, int> mp;
    void add(int f, int s, int x){
	auto L = mp.upper_bound(f);
	int col = -1;
	if(L != mp.begin())
	    col = prev(L)->S;
	auto R = L;
	while(R != mp.end() && (R->F) <= s)
	    col = R->S, R++;
	mp[f] = x;
	mp[s] = col;
    }
    int ask(int pos){
	auto it = mp.upper_bound(pos);
	if(it == mp.begin())
	    return -1;
	return prev(it)->S;
    }
};

vector<int> arr;

struct node2{
    node2 *L, *R;
    node* s;
    node2(){
	L = R = 0;
	s = 0;
    }
    void add(int fx, int sx, int fy, int sy, int x, int l = 0, int r = sz(arr) - 1){
	if(fx <= arr[l] && arr[r] <= sx){
	    if(s == 0)
		s = new node();
	    s->add(fy, sy, x);
	    return;
	}
	int mid = (l+r) >> 1;
	if(sx > arr[l] && arr[mid] > fx){
	    if(L == 0)
		L = new node2();
	    L->add(fx, sx, fy, sy, x, l, mid);
	}
	if(sx > arr[mid] && arr[r] > fx){
	    if(R == 0)
		R = new node2();
	    R->add(fx, sx, fy, sy, x, mid, r);
	}
    }
    int ask(int posx, int posy, int l = 0, int r = sz(arr) - 1){
	int mid = (l+r) >> 1;
	if(posx < arr[mid]){
	    int ans = -1;
	    if(s)
		ans = s->ask(posy);
	    if(L)
		ans = max(ans, L->ask(posx, posy, l, mid));
	    return ans;
	}
	else{
	    int ans = -1;
	    if(s)
		ans = s->ask(posy);
	    if(R)
		ans = max(ans, R->ask(posx, posy, mid, r));
	    return ans;
	}
    }
};
    
int N;
 
pii trans(pii p){ // x1 x2
    return {p.S, N - p.F};
}
pii trans2(pii p){ // x1 x2
    return {p.F, N - p.S};
}
 
struct bigTraingle{
    map<pii, pii> mp;
    vector<pii> to;
    node2* rt;
    
    void restart(){
	mp.clear();
	to.clear();
	rt = new node2();
	ins({0, N}, {0, 0});
    }
    pii color(pii p){
	int c = rt->ask(p.F, p.S);
	return to[c];
    }
    void put(pii l, pii r, pii x){
	rt->add(l.F, r.F + 1, l.S, r.S + 1, sz(to));
	to.PB(x);	
    }
    void ins(pii a, pii b){
	mp[a] = b;
	put(b, trans(a), a);
    }
    void add(int l, bool is){
	int x = l, y = N - l;
	if(is)
	    swap(x, y);
	auto it = --mp.upper_bound({x, inf});
	int L = it->F.F, R = it->F.S;
	pii p = it->S;
	mp.erase(it);
	if(!is){
	    pii A = {L, x}, B = {x + 1, R};
	    ins(A, p);
	    if(B.F <= B.S)
		ins(B, {B.F, p.S});
	}
	else{
	    pii A = {L, x - 1}, B = {x, R};
	    ins(B, p);
	    if(A.F <= A.S)
		ins(A, {p.F, N - A.S});
	}
    }
    pii calc(pii p){
	pii s = color(p);
	pii A = mp[s], B = trans(s), C = trans2(s);
	assert(A.F <= p.F && A.S <= p.S && p.F <= B.F && p.S <= B.S);
	return {max(C.F, p.F), max(C.S, p.S)};
    }
};
bigTraingle tr[20];
vector<int> ids[20];
int who[maxn];

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie();
    
    int m, q;
    cin >> N >> m >> q;
    
    vector<pii> p;
    for(int i = 0; i < 20; i++){
	if(bit(m, i)){
	    for(int j = 0; j < (1<<i); j++){
		int x, y;
		cin >> x >> y;
		who[sz(p)] = i;
		ids[i].PB(sz(p));
		p.PB({x, y});
	    }
	}
    }    
    
    stringstream CIN;
    for(int i = 0; i < q; i++){
	int task, a, b;
	cin >> task >> a;
	CIN << task << " " << a << " ";
	if(task == 4){
	    cin >> b;
	    CIN << b << " ";
	}
	if(task == 2){
	    arr.PB(N - a);
	    arr.PB(a+2);
	}
	if(task == 3){
	    arr.PB(a + 1);
	}
    }
    arr.PB(0);
    arr.PB(N);
    sort(arr.begin(), arr.end());
    arr.resize( unique(arr.begin(), arr.end()) - arr.begin() );

    // should be next of arr
    for(int i = 0; i < 20; i++){
	tr[i].restart();
    }
    
    while(q--){
	int task;
	CIN >> task;
	if(task == 1){
	    int id;
	    CIN >> id;
	    --id;
	    pii ans = tr[who[id]].calc(p[id]);
	    cout << ans.F << " " << ans.S << "\n";
	}
	if(task == 2){
	    int l;
	    CIN >> l;
	    for(int i = 0; i < 20; i++)
		if(!ids[i].empty())
		    tr[i].add(l, 1);
	}
	if(task == 3){
	    int l;
	    CIN >> l;
	    for(int i = 0; i < 20; i++)
		if(!ids[i].empty())
		    tr[i].add(l, 0);
	}
	if(task == 4){
	    int x, y;
	    CIN >> x >> y;

	    vector<int> vv;
	    vv.PB(sz(p));
	    
	    p.PB({x, y});
	    int pt = 0;
	    while(!ids[pt].empty()){
		for(int x : ids[pt])
		    vv.PB(x), p[x] = tr[pt].calc(p[x]);		
		ids[pt].clear();
		tr[pt].restart();
		pt++;
	    }
	    swap(ids[pt], vv);
	    for(int x : ids[pt]){
		who[x] = pt;
	    }
	}	
    }
    return 0;
}

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