oj.uz

답안 #1077272

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1077272 2024-08-27T04:28:43 Z pawned Petrol stations (CEOI24_stations) C++17
38 / 100
 3500 ms 2097152 KB 
#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")

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

#define fi first
#define se second
#define pb push_back
typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;

const char nl = '\n';

void fastIO() {
	ios::sync_with_stdio(false);
	cin.tie(0);
}

const int MAX = 70005;

ll N, K;

vector<ii> adj[MAX];

vector<ll> subsz(MAX, 0);
vi par(MAX, -1);

void dfs(int n) {
	subsz[n] = 1;
	for (ii x : adj[n]) {
		if (subsz[x.fi] == 0) {
			dfs(x.fi);
			par[x.fi] = n;
			subsz[n] += subsz[x.fi];
		}
	}
}

int main() {
	fastIO();
	cin>>N>>K;
	for (int i = 0; i < N - 1; i++) {
		int u, v, w;	// w <= 1e9, can be int
		cin>>u>>v>>w;
		adj[u].pb({v, w});
		adj[v].pb({u, w});
	}
	dfs(0);
/*	cout<<"subsz: ";
	for (int i = 0; i < N; i++) {
		cout<<subsz[i]<<" ";
	}
	cout<<endl;*/
	vi leaves;
	for (int i = 0; i < N; i++) {
		if (adj[i].size() == 1)
			leaves.pb(i);
	}
	map<ii, int> rem;
	for (int i = 0; i < N; i++) {
		for (ii p : adj[i]) {
			rem[{i, p.fi}] = adj[i].size() - 1;
		}
	}
/*	cout<<"rem: "<<endl;
	for (pair<ii, int> p : rem)
		cout<<"("<<p.fi.fi<<", "<<p.fi.se<<"): "<<p.se<<endl;*/
	vi base(K + 2, 0);
	base[K] = 1;
	base[K + 1] = 0;
	map<ii, vi> info;
	queue<ii> q;
	for (int x : leaves) {
		q.push({x, adj[x][0].fi});
		info[{x, adj[x][0].fi}] = base;
	}
	vector<bool> done(N, false);
	vector<vi> allinfo(N);
	while (!q.empty()) {
		ii x = q.front();
		// {curr, next}
		q.pop();
		for (ii p : adj[x.se]) {
			// p is {vertex, dist}
			if (p.fi == x.fi)
				continue;
			// subtract 1 from rem
			// if rem becomes 0, push
			ii y = {x.se, p.fi};
			rem[y]--;
			if (rem[y] == 0) {
				vi toput = base;
				q.push(y);
				// calculate info for y
				// find all previous
				if (!done[x.se]) {
					for (ii q : adj[x.se]) {
						if (q.fi == p.fi)
							continue;
						vi v = info[{q.fi, x.se}];
						for (int j = q.se; j <= K; j++) {	// need refill
							int arrive = j - q.se;
							if (arrive < p.se) {
								toput[K] += v[j];
								if (q.se == 0) {
									if (j != K)
										toput[K + 1] += v[j];
								}
								else {
									toput[K + 1] += v[j];
								}
							}
							else {
								toput[arrive] += v[j];
							}
						}
					}
					info[y] = toput;
					if (info.find({p.fi, x.se}) != info.end()) {
						allinfo[x.se] = toput;
						vi v = info[{p.fi, x.se}];
						for (int j = p.se; j <= K; j++) {	// need refill
							int arrive = j - p.se;
							if (arrive < p.se) {
								allinfo[x.se][K] += v[j];
								if (p.se == 0) {
									if (j != K)
										allinfo[x.se][K + 1] += v[j];
								}
								else {
									allinfo[x.se][K + 1] += v[j];
								}
							}
							else {
								allinfo[x.se][arrive] += v[j];
							}
						}
					}
				}
				else {	// already done, just subtract if q.fi = p.fi; i.e. p.fi to x.se
					info[y] = allinfo[x.se];
					vi v = info[{p.fi, x.se}];
					for (int j = p.se; j <= K; j++) {	// need refill
						int arrive = j - p.se;
						if (arrive < p.se) {
							info[y][K] -= v[j];
							if (p.se == 0) {
								if (j != K)
									info[y][K + 1] -= v[j];
							}
							else {
								info[y][K + 1] -= v[j];
							}
						}
						else {
							info[y][arrive] -= v[j];
						}
					}
				}
			}
		}
	}
/*	cout<<"info: ";
	for (pair<ii, vi> p : info) {
		cout<<"("<<p.fi.fi<<", "<<p.fi.se<<"): ";
		for (int x : p.se)
			cout<<x<<" ";
		cout<<endl;
	}*/
	vector<ll> ans(N, 0);
	for (pair<ii, vi> p : info) {
		ll pre = p.se[K + 1];	// number of refills, excluding start
		int x = p.fi.fi;
		int y = p.fi.se;
//		cout<<"at "<<x<<" "<<y<<endl;
		// going from x to y
		// ans[x] += (the size of y) times pre
		if (par[y] == x) {	// x is above y
			ans[x] += (subsz[y]) * pre;
//			cout<<"adding above "<<(subsz[y]) * pre<<endl;
		}
		else {	// y is above x
			ans[x] += (N - subsz[x]) * pre;
//			cout<<"adding below "<<(N - subsz[x]) * pre<<endl;
		}
	}
//	cout<<"ANSWER: ";
	for (ll x : ans)
		cout<<x<<" ";
	cout<<endl;
}

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 2 ms 2940 KB Output is correct

Subtask #1
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 2 ms 2940 KB Output is correct
3 Correct 8 ms 10844 KB Output is correct
4 Correct 7 ms 7004 KB Output is correct
5 Correct 79 ms 11984 KB Output is correct
6 Correct 7 ms 7768 KB Output is correct
7 Correct 6 ms 7256 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 12 ms 11684 KB Output is correct
10 Correct 10 ms 10872 KB Output is correct
11 Correct 13 ms 12892 KB Output is correct
12 Correct 12 ms 12888 KB Output is correct
13 Correct 16 ms 12892 KB Output is correct
14 Correct 434 ms 7392 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2908 KB Output is correct
2 Correct 287 ms 37008 KB Output is correct

Subtask #3
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 2 ms 2940 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 287 ms 37008 KB Output is correct
5 Runtime error 713 ms 2097152 KB Execution killed with signal 9
6 Halted 0 ms 0 KB -

Subtask #4
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 2 ms 2940 KB Output is correct
3 Correct 319 ms 35156 KB Output is correct
4 Correct 278 ms 40016 KB Output is correct
5 Correct 285 ms 43600 KB Output is correct
6 Correct 1 ms 2904 KB Output is correct
7 Correct 304 ms 40208 KB Output is correct
8 Correct 326 ms 40272 KB Output is correct
9 Correct 296 ms 40276 KB Output is correct

Subtask #5
0.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 2 ms 2940 KB Output is correct
3 Correct 319 ms 35156 KB Output is correct
4 Correct 278 ms 40016 KB Output is correct
5 Correct 285 ms 43600 KB Output is correct
6 Correct 1 ms 2904 KB Output is correct
7 Correct 304 ms 40208 KB Output is correct
8 Correct 326 ms 40272 KB Output is correct
9 Correct 296 ms 40276 KB Output is correct
10 Execution timed out 3537 ms 23288 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #6
0.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 2 ms 2940 KB Output is correct
3 Correct 8 ms 10844 KB Output is correct
4 Correct 7 ms 7004 KB Output is correct
5 Correct 79 ms 11984 KB Output is correct
6 Correct 7 ms 7768 KB Output is correct
7 Correct 6 ms 7256 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 12 ms 11684 KB Output is correct
10 Correct 10 ms 10872 KB Output is correct
11 Correct 13 ms 12892 KB Output is correct
12 Correct 12 ms 12888 KB Output is correct
13 Correct 16 ms 12892 KB Output is correct
14 Correct 434 ms 7392 KB Output is correct
15 Correct 1 ms 2908 KB Output is correct
16 Correct 287 ms 37008 KB Output is correct
17 Runtime error 713 ms 2097152 KB Execution killed with signal 9
18 Halted 0 ms 0 KB -