oj.uz

Submission #783061

# Submission time Handle Problem Language Result Execution time Memory
783061 2023-07-14T14:41:51 Z Charizard2021 Roadside Advertisements (NOI17_roadsideadverts) C++17
100 / 100
 39 ms 11588 KB 
#include<bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(false);; cin.tie(NULL)
void selfMax(long long& a, long long b){
    a = max(a, b);
}
void selfMin(long long& a, long long b){
    a = min(a, b);
}
template<typename T> istream& operator>>(istream& in, vector<T>& a) {for(auto &x : a) in >> x; return in;};
template<typename T1, typename T2> istream& operator>>(istream& in, pair<T1, T2>& x) {return in >> x.first >> x.second;}

template<typename T1, typename T2> ostream& operator<<(ostream& out, const pair<T1, T2>& x) {return out << x.first << ' ' << x.second;}
template<typename T> ostream& operator<<(ostream& out, vector<T>& a) {for(auto &x : a) out << x << ' '; return out;};
template<typename T> ostream& operator<<(ostream& out, vector<vector<T> >& a) {for(auto &x : a) out << x << '\n'; return out;};
template<typename T1, typename T2> ostream& operator<<(ostream& out, vector<pair<T1, T2> >& a) {for(auto &x : a) out << x << '\n'; return out;};

/*

Use DSU dsu(N);

*/
struct DSU {
	vector<long long> adj2;
	DSU(long long N) { adj2 = vector<long long>(N, -1); }

	// get representive component (uses path compression)
	long long get(long long x) { return adj2[x] < 0 ? x : adj2[x] = get(adj2[x]); }

	bool same_set(long long a, long long b) { return get(a) == get(b); }

	long long size(long long x) { return -adj2[get(x)]; }

	bool unite(long long x, long long y) {  // union by size
		x = get(x), y = get(y);
		if (x == y) return false;
		if (adj2[x] > adj2[y]) swap(x, y);
		adj2[x] += adj2[y]; adj2[y] = x;
		return true;
	}
};
/*

Run with Bit<long long> BIT

*/
template <class T> class BIT {
    private:
        long long size;
        vector<T> bit;
        vector<T> arr;
    public:
        BIT(long long size) : size(size), bit(size + 1), arr(size) {}
        void set(long long ind, long long val) { add(ind, val - arr[ind]); }
        void add(long long ind, long long val) {
            arr[ind] += val;
            ind++;
            for (; ind <= size; ind += ind & -ind) { bit[ind] += val; }
        }
        T pref_sum(long long ind) {
            ind++;
            T total = 0;
            for (; ind > 0; ind -= ind & -ind) { total += bit[ind]; }
            return total;
        }
};
/*

Change Comb for specific Seg tree probs, but run with Seg<long long> Seg;

*/
template<class T> struct Seg {
	const T ID = 1e18; T comb(T a, T b) { return min(a,b); }
	long long n; vector<T> seg;
	void init(long long _n) { n = _n; seg.assign(2*n,ID); }
	void pull(long long p) { seg[p] = comb(seg[2*p],seg[2*p+1]); }
	void upd(long long p, T val) {
		seg[p += n] = val; for (p /= 2; p; p /= 2) pull(p); }
	T query(long long l, long long r) {
		T ra = ID, rb = ID;
		for (l += n, r += n+1; l < r; l /= 2, r /= 2) {
			if (l&1) ra = comb(ra,seg[l++]);
			if (r&1) rb = comb(seg[--r],rb);
		}
		return comb(ra,rb);
	}
};
const int N = 50001;
int dp[17][N];
vector<pair<int, int> > adj[N];
int level[N];
int timeIn[N];
int timeOut[N];
long long dist[N];
int timeVal = 0;
void dfs(int u, int p){
    timeIn[u] = timeVal;
    timeVal++;
	for(pair<int, int> x : adj[u]){
        int v = x.first;
		if(v != p){
			dp[0][v] = u;
			level[v] = level[u] + 1;
            dist[v] = dist[u] + (long long)x.second;
			dfs(v, u);
		}
	}
    timeOut[u] = timeVal;
    timeVal++;
}
int solve(int x, int k){
	int val = 0;
	while(k > 0){
		if(k % 2 == 1){
			x = dp[val][x];
		}
		val++;
		k >>= 1;
	}
	return x;
}
int solve2(int a, int b){
	if(level[a] > level[b]){
		swap(a, b);
	}
	int difference = level[b] - level[a];
	b = solve(b, difference);
	if(a == b){
		return a;
	}
	for(int i = 16; i >= 0; i--){
		if(dp[i][a] != dp[i][b]){
			a = dp[i][a];
			b = dp[i][b];
		}
	}
	return dp[0][a];
}
long long dist2(int a, int b){
    return dist[a] + dist[b] - 2 * dist[solve2(a, b)];
}
int main(){
    IOS;
    int n;
    cin >> n;
	for(int i = 0; i < n - 1; i++){
		int a, b, c;
		cin >> a >> b >> c;
		adj[a].push_back(make_pair(b, c));
		adj[b].push_back(make_pair(a, c));
	}
	dfs(0, -1);
	for(int i = 1; i < 17; i++){
		for(int j = 0; j < n; j++){
			dp[i][j] = dp[i - 1][dp[i - 1][j]];
		}
	}
    int q;
    cin >> q;
	while(q--){
        vector<pair<int, int> > v;
        for(int i = 0; i < 5; i++){
            int x;
            cin >> x;
            v.push_back(make_pair(timeIn[x], x));
        }
        sort(v.begin(), v.end());
        long long ans = 0;
        for(int i = 0; i < 5; i++){
            ans += dist2(v[i].second, v[(i + 1) % 5].second);
        }
        cout << ans/2 << "\n";
	}
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 9160 KB Output is correct
2 Correct 27 ms 11524 KB Output is correct
3 Correct 28 ms 11524 KB Output is correct
4 Correct 28 ms 11524 KB Output is correct
5 Correct 34 ms 11504 KB Output is correct
6 Correct 29 ms 11512 KB Output is correct
7 Correct 28 ms 11524 KB Output is correct
8 Correct 32 ms 11584 KB Output is correct
9 Correct 28 ms 11588 KB Output is correct
10 Correct 32 ms 11572 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 7616 KB Output is correct
2 Correct 19 ms 10696 KB Output is correct
3 Correct 18 ms 10732 KB Output is correct
4 Correct 22 ms 10684 KB Output is correct
5 Correct 19 ms 10728 KB Output is correct
6 Correct 19 ms 10708 KB Output is correct
7 Correct 18 ms 10744 KB Output is correct
8 Correct 19 ms 10692 KB Output is correct
9 Correct 18 ms 10700 KB Output is correct
10 Correct 22 ms 10732 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 38 ms 9160 KB Output is correct
3 Correct 27 ms 11524 KB Output is correct
4 Correct 28 ms 11524 KB Output is correct
5 Correct 28 ms 11524 KB Output is correct
6 Correct 34 ms 11504 KB Output is correct
7 Correct 29 ms 11512 KB Output is correct
8 Correct 28 ms 11524 KB Output is correct
9 Correct 32 ms 11584 KB Output is correct
10 Correct 28 ms 11588 KB Output is correct
11 Correct 32 ms 11572 KB Output is correct
12 Correct 21 ms 7616 KB Output is correct
13 Correct 19 ms 10696 KB Output is correct
14 Correct 18 ms 10732 KB Output is correct
15 Correct 22 ms 10684 KB Output is correct
16 Correct 19 ms 10728 KB Output is correct
17 Correct 19 ms 10708 KB Output is correct
18 Correct 18 ms 10744 KB Output is correct
19 Correct 19 ms 10692 KB Output is correct
20 Correct 18 ms 10700 KB Output is correct
21 Correct 22 ms 10732 KB Output is correct
22 Correct 31 ms 10060 KB Output is correct
23 Correct 27 ms 8652 KB Output is correct
24 Correct 39 ms 11268 KB Output is correct
25 Correct 29 ms 11064 KB Output is correct
26 Correct 29 ms 11044 KB Output is correct
27 Correct 29 ms 11128 KB Output is correct
28 Correct 30 ms 11064 KB Output is correct
29 Correct 37 ms 11084 KB Output is correct
30 Correct 30 ms 11044 KB Output is correct
31 Correct 31 ms 11040 KB Output is correct