oj.uz

답안 #1087734

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1087734 2024-09-13T07:25:28 Z mychecksedad Petrol stations (CEOI24_stations) C++17
26 / 100
 3500 ms 15188 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define en cout << '\n'
#define vi vector<int>
#define pii pair<int, int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
const int N = 1e5+100;


int n, k, tin[N], tout[N], timer = 0, par[N];
vector<pii> g[N];
ll dp[N], s[N], dist[N], pd[N], PD[N], pdreal[N];
bool is_ancestor(int u, int v){
	return tin[u] <= tin[v] && tout[v] <= tout[u];
}
void f(int v, int p, int up, ll parw){
	// cout << v << ' ' << p << ' ' << up << ' ' << parw << ' ' << dist[v] << "f\n";
	if(dist[v] - dist[up] > k) return;
	if(dist[v] - dist[up] <= k && dist[v] - dist[up] + parw > k){
		// cout << "gh\n";
		dp[up] += dp[v];
	}
	for(auto U: g[v]){
		int u = U.ff;
		if(p != u){
			f(u, v, up, parw);
		}
	}
}
ll f3(int v, int p, int p2, ll parw, ll D){
	ll num = 0;
	if(D > k) return num;
	if(D <= k && D + parw > k){
		// cout << "gh\n";
		num += dp[v];
	}
	for(auto U: g[v]){
		int u = U.ff;
		if(p != u && u != p2){
			num += f3(u, v, p2, parw, D + U.ss);
		}
	}
	return num;
}
void f2(int v, int p, int up, int up2, ll parw, ll D){
	// cout << v << ' ' << p << ' ' << up << ' ' << parw << ' ' << dist[v] << "f\n";
	if(D > k) return;
	if(D <= k && D + parw > k){
		if(is_ancestor(v, up)){
			ll num = 0;
			// cout << v << " : " << up << '\n';
			// ll num = f3(v, p, par[v], dist[p] - dist[v], 0ll);
			pd[up2] += pd[p];
			PD[up2] += pd[p] * s[up2];
		}else{
			// cout << v << ':' << up << '\n';
			pd[up2] += dp[v];
			PD[up2] += dp[v] * s[up2];
		}
	}
	for(auto U: g[v]){
		int u = U.ff;
		if(p != u){
			f2(u, v, up, up2, parw, D+U.ss);
		}
	}
}

void dfs(int v, int p, ll parw){
	dp[v] = 1;
	s[v] = 1;
	par[v] = p;
	tin[v] = timer++;
	for(auto U: g[v]){
		int u = U.ff;
		if(u != p){
			dist[u] = dist[v] + U.ss;
			dfs(u, v, U.ss);
			s[v] += s[u];
		}
	}
	tout[v] = timer++;
	f(v, p, v, parw);
}
void dfs2(int v, int p, ll parw){
	pd[v] = 1;
	PD[v] = 0;
	if(p != v)
		f2(p, v, p, v, parw, 0ll);
	for(auto U: g[v]){
		int u = U.ff;
		if(u != p){
			dfs2(u, v, U.ss);
		}
	}
}
void solve(){
	cin >> n >> k;
	for(int i = 1; i < n; ++i){
		int u, v, w; cin >> u >> v >> w;
		++u, ++v;
		g[u].pb({v, w});
		g[v].pb({u, w});
	}
	dfs(1, 1, 0);
	// for(int i = 1; i <= n; ++i){
	// 	cout << dp[i] << ' ';
	// }
	dfs2(1, 1, 0);
	// for(int i = 1; i <= n; ++i) cout << dp[i] << ' ' << pd[i] << '\n';
	for(int i = 1; i <= n; ++i){
		pdreal[i] = 0;
		for(auto U: g[i]){
			if(U.ff != par[i]) pdreal[i] += PD[U.ff];
		}
		cout << (dp[i] - 1) * (n - s[i]) + pdreal[i] << '\n';
	}
}

int main(){
	cin.tie(0); ios::sync_with_stdio(0);
	solve();
	return 0;
}

Compilation message

Main.cpp: In function 'void f2(int, int, int, int, long long int, long long int)':
Main.cpp:54:7: warning: unused variable 'num' [-Wunused-variable]
   54 |    ll num = 0;
      |       ^~~

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct

Subtask #1
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 5 ms 2908 KB Output is correct
4 Correct 10 ms 2908 KB Output is correct
5 Correct 3 ms 2908 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 11 ms 3040 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 2 ms 2908 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 2 ms 2904 KB Output is correct
12 Correct 2 ms 2908 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 8 ms 2904 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 40 ms 15088 KB Output is correct

Subtask #3
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 40 ms 15088 KB Output is correct
5 Correct 46 ms 15188 KB Output is correct
6 Execution timed out 3527 ms 13104 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 76 ms 10324 KB Output is correct
4 Correct 43 ms 14868 KB Output is correct
5 Execution timed out 3572 ms 14080 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #5
0.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 76 ms 10324 KB Output is correct
4 Correct 43 ms 14868 KB Output is correct
5 Execution timed out 3572 ms 14080 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #6
0.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 5 ms 2908 KB Output is correct
4 Correct 10 ms 2908 KB Output is correct
5 Correct 3 ms 2908 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 11 ms 3040 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 2 ms 2908 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 2 ms 2904 KB Output is correct
12 Correct 2 ms 2908 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 8 ms 2904 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 40 ms 15088 KB Output is correct
17 Correct 46 ms 15188 KB Output is correct
18 Execution timed out 3527 ms 13104 KB Time limit exceeded
19 Halted 0 ms 0 KB -