Submission #1153842

#	Time	Username	Problem	Language	Result	Execution time	Memory
1153842		thelegendary08	Sjekira (COCI20_sjekira)	C++17	10 / 110	41 ms	14916 KiB

sjekira

#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vb vector<bool>
#define mii map<int,int>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define in(a) int a; cin>>a
#define in2(a,b) int a,b; cin>>a>>b
#define in3(a,b,c) int a,b,c; cin>>a>>b>>c
#define in4(a,b,c,d) int a,b,c,d; cin>>a>>b>>c>>d
#define vin(v,n); vi v(n); f0r(i,n){cin>>v[i];}
#define out(a) cout<<a<<'\n'
#define out2(a,b) cout<<a<<' '<<b<<'\n'
#define out3(a,b,c) cout<<a<<' '<<b<<' '<<c<<'\n'
#define out4(a,b,c,d) cout<<a<<' '<<b<<' '<<c<<' '<<d<<'\n'
#define vout(v) for(auto u : v){cout<<u<<' ';} cout<<'\n'
#define dout(a) cout<<a<<' '<<#a<<'\n'
#define dout2(a,b) cout<<a<<' '<<#a<<' '<<b<<' '<<#b<<'\n'
#define yn(x); if(x){cout<<"YES"<<'\n';}else{cout<<"NO"<<'\n';}
const int leg = 1e9 + 7;
const int mod = 998244353;
using namespace std;
const int mxn = 1e5 + 5;
pii tree[mxn * 4];
int n;
int v[mxn];
vi adj[mxn];
void update(int k, int x){
	k += n;
	tree[k] = {x, k-n};
	for(k/=2; k>=1; k/=2){
		tree[k] = max(tree[k*2], tree[k*2+1]);
	}
}
pii quer(int l, int r){
	if(l > r)return {0,0};
	l += n; r += n;
	pii ret = {-1, 0};
	while(l <= r){
		if(l % 2 == 1)ret = max(ret, tree[l++]);
		if(r % 2 == 0)ret = max(ret, tree[r--]);
		l/=2; r/=2;
	}
	return ret;
}
int solve(int l, int r){
	//dout2(l,r);
	if(l > r)return 0;
	pii mn = quer(l, r);
	int ans = 0;
	if(mn.second + 1 <= r){
		ans += quer(mn.second+1, r).first + mn.first;
	}
	if(mn.second - 1 >= l){
		ans += quer(l, mn.second-1).first + mn.first;
	}
	//out3(l,r,ans);
	ans += solve(l, mn.second - 1) + solve(mn.second + 1, r);
	return ans;
}
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	cin>>n;
	f0r(i,n)cin>>v[i];
	f0r(i,n){
		update(i, v[i]);
	}
	f0r(i,n-1){
		in2(a,b);
		a--; b--;
		adj[a].pb(b);
		adj[b].pb(a);
	}
	//f0r(i,n)cout<<nxt[i]<<' ';
	//cout<<'\n';
	cout<<solve(0, n-1);
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 30
• Subtask 4: 0 / 60