Submission #1254678

#	Time	Username	Problem	Language	Result	Execution time	Memory
1254678		mngoc._.	Pilot (NOI19_pilot)	C++20	40 / 100	96 ms	29372 KiB

pilot

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
#include<bits/stdc++.h>
#define pii pair<int , int>
using namespace std;
const int N = 1e6 + 1;
int h[N];
vector<int> adj[N];
vector<pii> queries;
int n , q;
int check[N];
long long ans[N];
long long res = 0;

struct DSU{
	int sz[N];
	int par[N];
	
	void init(void){
	    for(int i = 1 ; i <= n ; i++){
	    	sz[i] = 1;
		    par[i] = i;
    	}
	}
	
	int find(int u){
		if(u == par[u]) return u;
	    return par[u] = find(par[u]);
	}
	
	void joinset(int u , int v){
		u = find(u);
		v = find(v);
		if(u == v) return;
		if(sz[u] < sz[v]) swap(u , v);
	    res -= ((sz[u] + 1) * sz[u] / 2 + (sz[v] + 1) * (sz[v]) / 2);
		sz[u] += sz[v];
		par[v] = u;
		res += (sz[u] + 1) * sz[u] / 2;
	}

	
} dsu;



void solve(void){
	cin >> n >> q;
	for(int i = 1;  i <= n ; i++) cin >> h[i];
	for(int i = 1 ; i <= q ; i++){
		int w; cin >> w;
		queries.push_back(make_pair(w, i));
	}
	sort(queries.begin() , queries.end());
	for(int i = 1 ; i <= n ; i++){
		int pos = lower_bound(queries.begin() , queries.end() , make_pair(h[i] , 0)) - queries.begin();
		adj[queries[pos].second].push_back(i);
	}
	dsu.init();
	for(int i = 1 ; i <= n ; i++) check[i] = -1;
	for(int i = 0 ; i <= q - 1; i++){
	    for(auto x : adj[queries[i].second]){
	    	if(check[x] == -1){
	    		res++;
	    		check[x] = 1;
			}
			//cerr << "Debug" << " " << check[x] << " " <<  queries[i].first << " " << queries[i].second << " " << res << endl;
			if(x + 1 <= n && h[x + 1] <= queries[i].first) dsu.joinset(x , x + 1);
			if(x - 1 >= 1 && h[x - 1] <= queries[i].first) dsu.joinset(x , x - 1);
		}
		ans[queries[i].second] = res;
	}
	
	for(int i = 1 ; i <= q ; i++) cout << ans[i] << endl;
	
	
	
	
}



signed main(void){
	ios_base :: sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	solve();
	return 0;
}

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 0 / 5
• Subtask 6: 0 / 9
• Subtask 7: 0 / 14
• Subtask 8: 0 / 10
• Subtask 9: 0 / 11
• Subtask 10: 0 / 11