Submission #1273036

#	Time	Username	Problem	Language	Result	Execution time	Memory
1273036		goulthen	Rigged Roads (NOI19_riggedroads)	C++20	10 / 100	170 ms	46472 KiB

riggedroads

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

#define int long long
#define rep(i,a,b) for(int i = a; i <= b; i++)
#define per(i,a,b) for(int i = a; i >= b; i--)
#define pii pair<int,int>
#define pb push_back
#define fi first
#define se second

const int MAXN = 3e5+10;
const int INF = 1e18+10;
vector<int> g[MAXN];
int u[MAXN], v[MAXN], val[MAXN], a[MAXN];
int spa[MAXN];
bool ispa[MAXN];

int t = 0;
int dfs(int u, int p = -1) {
	for (int &v : g[u]) if (v!=p) a[u] = min(a[u],dfs(v,u));
	return a[u];
}

int32_t main() {
	ios_base::sync_with_stdio(0); cin.tie(nullptr);
	int n,m; cin >> n >> m;
	rep(i,1,m) cin >> u[i] >> v[i];
	rep(i,1,n) a[i] = INF;
	
	rep(i,1,n-1) {
		int c;cin >> c;
		spa[i] = c;
		ispa[c] = 1;
		int x = u[c], y=v[c];
		g[x].pb(y);
		g[y].pb(x);
	}

	vector<array<int,3>> ord;
	rep(i,1,m) if (!ispa[i]) {
		a[u[i]] = min(a[u[i]], i);
		a[v[i]] = min(a[v[i]], i);
		ord.pb({i,1,i});
	}

	dfs(1);

	rep(i,1,n-1) {
		int x = spa[i];
		ord.pb({max(a[u[x]], a[v[x]]), 0, x});
	}

	sort(ord.begin(),ord.end());

	rep(i,1,m) {
		val[ord[i-1][2]] = i;
	}


	rep(i,1,m) cout << val[i] << " \n"[i==m];
	return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 19
• Subtask 3: 0 / 9
• Subtask 4: 0 / 10
• Subtask 5: 10 / 10
• Subtask 6: 0 / 12
• Subtask 7: 0 / 32