Submission #1026938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026938		vjudge1	Sličnost (COI23_slicnost)	C++17	67 / 100	567 ms	524288 KiB

Main

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

#define int long long

void f(){
	#ifndef ONLINE_JUDGE
	freopen("in.txt", "r", stdin);
	freopen("out.txt", "w", stdout);
	#endif
}

struct segtree{
	int n, tl, tr, val, pos; 
	vector<int> roots, left, right;

	vector<array<int , 3>> st;


	array<int, 3> TxT(array<int, 3> l, array<int, 3> r){
		
		array<int, 3> res={0, 0, 0};
	
		res[0]=l[0]+r[0];
		res[1]=max(l[1], l[0]+r[1]);

		if(l[1]==res[1]) res[2]+=l[2];
		if(r[1]+l[0]==res[1]) res[2]+=r[2];

		return res;
	}

	int add(){
		int id=st.size();
		st.push_back({0, 0, 0});
		left.push_back(-1);
		right.push_back(-1);
		return id;
	}

	segtree(int _n){
		n=_n;

		int v=add();

		roots.push_back(v);
		build(v, 0, n-1);
	}

	void build(int v, int l, int r){
		if(l==r) st[v]={0, 0, 1};
		else{
			int mid=(l+r)/2;
			if(left[v]==-1) left[v]=add();
			if(right[v]==-1) right[v]=add();

			build(left[v], l, mid);
			build(right[v], mid+1, r);

			st[v]=TxT(st[left[v]], st[right[v]]);
		}
	}


	void update(int v, int l, int r, int nv){
		if(l==r){
			st[nv]=st[v];
			st[nv][0]+=val; st[nv][1]+=val;
		}
		else{
			int mid=(l+r) / 2;
			if(pos<=mid){
				left[nv]=add();
				right[nv]=right[v];
				update(left[v], l, mid, left[nv]);
			}
			else{
				left[nv]=left[v];
				right[nv]=add();
				update(right[v], mid+1, r, right[nv]);
			}
			st[nv]=TxT(st[left[nv]], st[right[nv]]);
		}


	}
	int upd(int p, int l, int v){
		pos=l, val=v;
		int id=add();
		roots.push_back(id);
		update(p, 0, n-1, id);
		return id;
	}

	array<int, 3> g(int v, int l, int r){
		if(l>tr||r<tl) return {0, 0, 0};
		else if(l>=tl&&r<=tr) return st[v];
		else{
			int mid=(l+r) /2;
			return TxT(g(left[v], l, mid), g(right[v], mid+1, r));

		}
	}
	array<int, 2> get(int pos, int l, int r){
		tl = l; tr = r;
		auto x= g(pos, 0, n-1);

		return {x[1], x[2]};
	}
};

signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);

	//f();

	int n, k, q; cin >> n >> k >> q;

	segtree st(n+1);

	vector<int> a(n), b(n), pos(n), segt;
	int c=0;
	for(auto &i: a) cin >> i, i--;
	for(auto &i: b) cin >> i, i--, pos[i]=c++;

	auto ek=[&](int y, int i){
		int r=pos[i];

		int x=st.upd(y, max(0LL, r-k+1), 1);
		st.upd(x, r+1, -1);
		return (int) st.roots.back();
	
	};
	auto cik=[&](int y, int i){
		int r=pos[i];
		int x= st.upd(y, max(0LL, r-k+1), -1);
		st.upd(x, r+1, 1);
		return (int)st.roots.back();
	};

	for(int i=0; i<k; i++){
		ek(st.roots.back(), a[i]);
	}
	segt.push_back(st.roots.back());
	
	vector<array<int,2>> all(n-k+1);
	vector<int> pf(n+3);

	auto x=st.get(st.roots.back(), 0, n-k);
	all[0]=x;
	pf[x[0]]+=x[1];
	
	for(int i=k; i<n; i++){
		cik(st.roots.back(), a[i-k]); 
		segt.push_back(ek(st.roots.back(), a[i]));
		auto y=st.get(segt.back(), 0, n-k);
		all[i-k+1]=y;
		pf[y[0]]+=y[1];

		if(y[0]==x[0]) x[1]+=y[1];
		else if(y[0]>x[0]) x=y;
	}
		
	cout<<x[0]<<" "<<x[1]<<"\n";

	auto cikar=[&](int v, int value){
		if(v<0) return;
		
		pf[all[v][0]] -= all[v][1];
		segt[v]=cik(segt[v], value);
		auto x=st.get(segt[v], 0, n-k);
		all[v] = x;
		pf[all[v][0]] += all[v][1];
	};

	auto cikar2=[&](int v, int value){
		if(v>n-k) return;
		
		pf[all[v][0]] -= all[v][1];
		segt[v]=cik(segt[v], value);
		auto x=st.get(segt[v], 0, n-k);
		all[v] = x;
		pf[all[v][0]] += all[v][1];
	};
	auto ekle=[&](int v, int value){
		if(v<0) return;
		
		pf[all[v][0]] -= all[v][1];
		segt[v]=ek(segt[v], value);
		auto x=st.get(segt[v], 0, n-k);

		all[v] = x;
		pf[all[v][0]] += all[v][1];
	};

	auto ekle2=[&](int v, int value){
		if(v>n-k) return;
		
		pf[all[v][0]] -= all[v][1];
		segt[v]=ek(segt[v], value);
		auto x=st.get(segt[v], 0, n-k);

		all[v] = x;
		pf[all[v][0]] += all[v][1];
	};

	int ma=x[0];
	while(q--){
		int p; cin >> p; p--;
		
		cikar(p-k+1, a[p]);
		cikar2(p+1, a[p+1]);

		swap(a[p], a[p+1]);

		ekle(p-k+1, a[p]);
		ekle2(p+1, a[p+1]);

		if(pf[ma+1]>0) ma++;
		else if(pf[ma]==0) ma--;

		cout<<ma<<" "<<pf[ma]<<"\n";
	}
}

Compilation message (stderr)

Main.cpp: In function 'void f()':
Main.cpp:8:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |  freopen("in.txt", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:9:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |  freopen("out.txt", "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 33 / 33
• Subtask 4: 7 / 7
• Subtask 5: 10 / 10
• Subtask 6: 0 / 33