답안 #520878

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
520878	2022-01-31T10:45:15 Z	fatemetmhr	Designated Cities (JOI19_designated_cities)	C++17	100 / 100	471 ms	79892 KB

designated_cities

//  ~Be name khoda~  //

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

#define pb       push_back
#define mp       make_pair
#define all(x)   x.begin(), x.end()
#define fi       first
#define se       second
#define cl       clear
#define endll    '\n'

const int maxn  =  1e6   + 10;
const int maxn5 =  1e6   + 10;
const int maxnt =  4e6   + 10;
const int maxn3 =  1e3   + 10;
const int mod   =  1e9   +  7;
const ll  inf   =  2e18;

int n;
ll ans1 = -1;
ll ans = -1;
int ccnt = 0, den[maxn5];
bool mark[maxn5];
vector <pair<int, int>> adj[maxn5];
ll c[maxn5], best1[maxn5], up[maxn5];
int par[maxn5], ti = -1, st[maxn5], ft[maxn5], ver[maxn5];
ll edgepar[maxn5], sumall[maxn5], lazy[maxnt], out[maxn5];
ll ex[maxn5], neg[maxn5];
pair<ll, int> farr[maxn5], mx[maxnt];
pair<int, int> req[maxn5];


inline void dfsdown(int v, int par){
	best1[v] = 0;
	for(auto [u, id] : adj[v]) if(u != par){
		dfsdown(u, v);
		best1[u] += c[id];
		best1[v] += best1[u];
		ex[u] = c[id];
	}
	return;
}

inline void dfsup(int v, int par){
	ll sum = 0;
	for(auto [u, id] : adj[v]){
		if(u != par)
			sum += best1[u];
		else
			up[v] += c[id];
	}
	
	for(auto [u, id] : adj[v]) if(u != par){
		up[u] = up[v] + sum - best1[u];
		dfsup(u, v);
	}
	return;
}

inline void dfsfar1(int v, int par){
	mx[v] = {0, v};
	den[v] = v;
	for(auto [u, id] : adj[v]) if(u != par){
		dfsfar1(u, v);
		if(mx[v] <= mx[u]){
			mx[v] = mx[u];
			den[v] = u;
		}
	}
	for(auto [u, id] : adj[v]) if(u == par){
		mx[v].fi += c[id];
		neg[v] = c[id];
	}
	//cout << "so right " << v << ' ' << mx[v].fi << ' ' << mx[v].se << ' ' << den[v] << endl;
	return;
}

inline void dfsfar2(int v, int par){
	ll ex = 0;
	for(auto [u, id] : adj[v]){
		if(u != par && u != den[v]){
			farr[u] = max(farr[v], {mx[v].fi - neg[v], mx[v].se});
			farr[u].fi += c[id];
			dfsfar2(u, v);
		}
		else if(u == den[v])
			ex = c[id];
	}
	//cout << "ok " << v << ' ' << farr[v].fi << ' ' << farr[v].se << endl;
	if(den[v] == v)
		return;
	pair <ll, int> tmp = farr[v];
	for(auto [u, id] : adj[v]) if(u != par && u != den[v]){
		tmp = max(tmp, mx[u]);
	}
	farr[den[v]] = tmp;
	farr[den[v]].fi += ex;
	dfsfar2(den[v], v);

	return;
}

inline void dfs(int v, int parr){
	par[v] = parr;
	st[v] = ++ti;
	ver[ti] = v;
	for(auto [u, id] : adj[v]) if(u == parr){
		sumall[v] += c[id];
		edgepar[v] = c[id];
	}
	for(auto [u, id] : adj[v]){
		if(u != parr){
			sumall[u] += sumall[v];
			dfs(u, v);
		}
	}
	ft[v] = ti;
	return;
}

inline void build(int l, int r, int v){
	if(r - l == 1){
		mx[v].se = ver[l];
		mx[v].fi = 0;
		if(adj[ver[l]].size() == 1){
			mx[v].fi = sumall[ver[l]];
		}
		return;
	}
	int mid = (l + r) >> 1;
	build(l, mid, v * 2);
	build(mid, r, v * 2 + 1);
	mx[v] = max(mx[v * 2], mx[v * 2 + 1]);
	return;
}

inline void add(int l, int r, int lq, int rq, ll val, int v){
	if(rq <= l || r <= lq)
		return;
	if(lq <= l && r <= rq){
		lazy[v] += val;
		mx[v].fi += val;
		return;
	}
	int mid = (l + r) >> 1;
	add(l, mid, lq, rq, val, v * 2);
	add(mid, r, lq, rq, val, v * 2 + 1);
	mx[v] = max(mx[v * 2], mx[v * 2 + 1]);
	mx[v].fi += lazy[v];
	return;
}

inline void cons(int v){
	if(mark[v]) 
		return;
	ans += edgepar[v];
	add(0, n, st[v], ft[v] + 1, -edgepar[v], 1);
	mark[v] = true;
	cons(par[v]);
	return;
}

inline ll find_1(){
	dfsdown(0, -1);
	dfsup(0, -1);
	ans1 = 0;
	for(int i = 0; i < n; i++){
		//cout << i << ' ' << best1[i] << ' ' << up[i] << '\n';
		best1[i] += up[i] - ex[i];
		ans1 = max(ans1, best1[i]);
		//cout << best1[i] << '\n';
	}
	//cout << "WELL " << ans1 << '\n';
	return ans1;
}

inline void find_2(){
	int r = 0;
	for(int i = 0; i < n; i++) if(adj[i].size() != 1)
		r = i;
	//cout << "rrrrrrrr " << r << endl;
	dfsfar1(r, -1);
	farr[r] = {0, 0};
	dfsfar2(r, -1);
	int optz = 0;
	for(int i = 0; i < n; i++) if(adj[i].size() == 1){
		ll val = best1[i] + farr[i].fi;
		//cout << "& " << i << ' ' << best1[i] << ' ' << farr[i].fi << ' ' << farr[i].se << endl;
		if(val >= ans){
			optz = i;
			ans = val;
		}
	}
	//cout << ans << endl;
	dfs(optz, -1);
	build(0, n, 1);
	mark[optz] = true;
	cons(farr[optz].se);
	ans -= farr[optz].fi;
	//cout << "allright " << optz << endl;
	return;
}

inline void upd(){
	if(ccnt == 0)
		return;
	int v = mx[1].se;
	cons(v);
	ccnt--;
	return;
}

int main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	
	cin >> n;
	int ind = 0;
	ll tot = 0;
	for(int i = 0; i < n - 1; i++){
		int a, b; cin >> a >> b >> c[ind] >> c[ind + 1];
		a--; b--;
		adj[a].pb({b, ind + 1});
		adj[b].pb({a, ind});
		tot += c[ind] + c[ind + 1];
		ind += 2;
	}
	ccnt = 0;
	for(int i = 0; i < n; i++) if(adj[i].size() == 1)
		ccnt++;
	int q; cin >> q;
	for(int i = 0; i < q; i++){
		cin >> req[i].fi;
		req[i].se = i;
	}
	if(n == 2){
		for(int i = 0; i < q; i++){
			if(req[i].fi == 1){
				cout << min(c[0], c[1]) << '\n';
			}
			else{
				cout << 0 << '\n';
			}
		}
		return 0;
	}
	sort(req, req + q);
	find_1();
	find_2();
	int last = 2;
	//cout << ans << endl;
	for(int i = 0; i < q; i++){
		if(req[i].fi == 1){
			out[req[i].se] = ans1;
			//cout << "well done " << i << ' ' << req[i].se << ' ' << out[req[i].se] << ' ' << ans1 << '\n';
		}
		else{
			while(last < req[i].fi){
				last++;
				upd();
			}
			out[req[i].se] = ans;
		}
	}
	for(int i = 0; i < q; i++)
		cout << tot - out[i] << '\n';
}

/*
5
2 1 5 5
3 2 4 5
4 2 4 3
5 4 5 5
1
2
*/

Subtask #1

6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	23756 KB	Output is correct
2	Correct	14 ms	23908 KB	Output is correct
3	Correct	12 ms	23952 KB	Output is correct
4	Correct	12 ms	23924 KB	Output is correct
5	Correct	12 ms	23884 KB	Output is correct
6	Correct	16 ms	23824 KB	Output is correct
7	Correct	12 ms	23932 KB	Output is correct
8	Correct	12 ms	23884 KB	Output is correct
9	Correct	12 ms	23940 KB	Output is correct
10	Correct	12 ms	23884 KB	Output is correct
11	Correct	12 ms	23840 KB	Output is correct

Subtask #2

7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	15 ms	23756 KB	Output is correct
2	Correct	312 ms	62940 KB	Output is correct
3	Correct	403 ms	74824 KB	Output is correct
4	Correct	309 ms	64156 KB	Output is correct
5	Correct	294 ms	65576 KB	Output is correct
6	Correct	357 ms	70544 KB	Output is correct
7	Correct	248 ms	65596 KB	Output is correct
8	Correct	414 ms	75116 KB	Output is correct
9	Correct	169 ms	66124 KB	Output is correct

Subtask #3

9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	23788 KB	Output is correct
2	Correct	350 ms	62984 KB	Output is correct
3	Correct	380 ms	75908 KB	Output is correct
4	Correct	321 ms	65084 KB	Output is correct
5	Correct	293 ms	65564 KB	Output is correct
6	Correct	336 ms	70656 KB	Output is correct
7	Correct	200 ms	65752 KB	Output is correct
8	Correct	394 ms	74256 KB	Output is correct
9	Correct	167 ms	65588 KB	Output is correct

Subtask #4

17.0 / 17.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	23756 KB	Output is correct
2	Correct	14 ms	23908 KB	Output is correct
3	Correct	12 ms	23952 KB	Output is correct
4	Correct	12 ms	23924 KB	Output is correct
5	Correct	12 ms	23884 KB	Output is correct
6	Correct	16 ms	23824 KB	Output is correct
7	Correct	12 ms	23932 KB	Output is correct
8	Correct	12 ms	23884 KB	Output is correct
9	Correct	12 ms	23940 KB	Output is correct
10	Correct	12 ms	23884 KB	Output is correct
11	Correct	12 ms	23840 KB	Output is correct
12	Correct	13 ms	23768 KB	Output is correct
13	Correct	14 ms	24308 KB	Output is correct
14	Correct	14 ms	24396 KB	Output is correct
15	Correct	15 ms	24284 KB	Output is correct
16	Correct	14 ms	24268 KB	Output is correct
17	Correct	14 ms	24268 KB	Output is correct
18	Correct	14 ms	24364 KB	Output is correct
19	Correct	14 ms	24316 KB	Output is correct
20	Correct	14 ms	24368 KB	Output is correct
21	Correct	15 ms	24264 KB	Output is correct
22	Correct	14 ms	24352 KB	Output is correct
23	Correct	15 ms	24324 KB	Output is correct
24	Correct	14 ms	24268 KB	Output is correct
25	Correct	14 ms	24364 KB	Output is correct
26	Correct	16 ms	24268 KB	Output is correct

Subtask #5

17.0 / 17.0

#	결과	실행 시간	메모리	Grader output
1	Correct	15 ms	23756 KB	Output is correct
2	Correct	312 ms	62940 KB	Output is correct
3	Correct	403 ms	74824 KB	Output is correct
4	Correct	309 ms	64156 KB	Output is correct
5	Correct	294 ms	65576 KB	Output is correct
6	Correct	357 ms	70544 KB	Output is correct
7	Correct	248 ms	65596 KB	Output is correct
8	Correct	414 ms	75116 KB	Output is correct
9	Correct	169 ms	66124 KB	Output is correct
10	Correct	13 ms	23788 KB	Output is correct
11	Correct	350 ms	62984 KB	Output is correct
12	Correct	380 ms	75908 KB	Output is correct
13	Correct	321 ms	65084 KB	Output is correct
14	Correct	293 ms	65564 KB	Output is correct
15	Correct	336 ms	70656 KB	Output is correct
16	Correct	200 ms	65752 KB	Output is correct
17	Correct	394 ms	74256 KB	Output is correct
18	Correct	167 ms	65588 KB	Output is correct
19	Correct	14 ms	23760 KB	Output is correct
20	Correct	403 ms	69628 KB	Output is correct
21	Correct	402 ms	76104 KB	Output is correct
22	Correct	383 ms	68204 KB	Output is correct
23	Correct	328 ms	68008 KB	Output is correct
24	Correct	319 ms	64516 KB	Output is correct
25	Correct	383 ms	67504 KB	Output is correct
26	Correct	310 ms	64520 KB	Output is correct
27	Correct	340 ms	69572 KB	Output is correct
28	Correct	384 ms	70600 KB	Output is correct
29	Correct	337 ms	66132 KB	Output is correct
30	Correct	300 ms	65340 KB	Output is correct
31	Correct	278 ms	69776 KB	Output is correct
32	Correct	398 ms	73892 KB	Output is correct
33	Correct	187 ms	69252 KB	Output is correct

Subtask #6

44.0 / 44.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	23756 KB	Output is correct
2	Correct	14 ms	23908 KB	Output is correct
3	Correct	12 ms	23952 KB	Output is correct
4	Correct	12 ms	23924 KB	Output is correct
5	Correct	12 ms	23884 KB	Output is correct
6	Correct	16 ms	23824 KB	Output is correct
7	Correct	12 ms	23932 KB	Output is correct
8	Correct	12 ms	23884 KB	Output is correct
9	Correct	12 ms	23940 KB	Output is correct
10	Correct	12 ms	23884 KB	Output is correct
11	Correct	12 ms	23840 KB	Output is correct
12	Correct	15 ms	23756 KB	Output is correct
13	Correct	312 ms	62940 KB	Output is correct
14	Correct	403 ms	74824 KB	Output is correct
15	Correct	309 ms	64156 KB	Output is correct
16	Correct	294 ms	65576 KB	Output is correct
17	Correct	357 ms	70544 KB	Output is correct
18	Correct	248 ms	65596 KB	Output is correct
19	Correct	414 ms	75116 KB	Output is correct
20	Correct	169 ms	66124 KB	Output is correct
21	Correct	13 ms	23788 KB	Output is correct
22	Correct	350 ms	62984 KB	Output is correct
23	Correct	380 ms	75908 KB	Output is correct
24	Correct	321 ms	65084 KB	Output is correct
25	Correct	293 ms	65564 KB	Output is correct
26	Correct	336 ms	70656 KB	Output is correct
27	Correct	200 ms	65752 KB	Output is correct
28	Correct	394 ms	74256 KB	Output is correct
29	Correct	167 ms	65588 KB	Output is correct
30	Correct	13 ms	23768 KB	Output is correct
31	Correct	14 ms	24308 KB	Output is correct
32	Correct	14 ms	24396 KB	Output is correct
33	Correct	15 ms	24284 KB	Output is correct
34	Correct	14 ms	24268 KB	Output is correct
35	Correct	14 ms	24268 KB	Output is correct
36	Correct	14 ms	24364 KB	Output is correct
37	Correct	14 ms	24316 KB	Output is correct
38	Correct	14 ms	24368 KB	Output is correct
39	Correct	15 ms	24264 KB	Output is correct
40	Correct	14 ms	24352 KB	Output is correct
41	Correct	15 ms	24324 KB	Output is correct
42	Correct	14 ms	24268 KB	Output is correct
43	Correct	14 ms	24364 KB	Output is correct
44	Correct	16 ms	24268 KB	Output is correct
45	Correct	14 ms	23760 KB	Output is correct
46	Correct	403 ms	69628 KB	Output is correct
47	Correct	402 ms	76104 KB	Output is correct
48	Correct	383 ms	68204 KB	Output is correct
49	Correct	328 ms	68008 KB	Output is correct
50	Correct	319 ms	64516 KB	Output is correct
51	Correct	383 ms	67504 KB	Output is correct
52	Correct	310 ms	64520 KB	Output is correct
53	Correct	340 ms	69572 KB	Output is correct
54	Correct	384 ms	70600 KB	Output is correct
55	Correct	337 ms	66132 KB	Output is correct
56	Correct	300 ms	65340 KB	Output is correct
57	Correct	278 ms	69776 KB	Output is correct
58	Correct	398 ms	73892 KB	Output is correct
59	Correct	187 ms	69252 KB	Output is correct
60	Correct	12 ms	23760 KB	Output is correct
61	Correct	425 ms	75516 KB	Output is correct
62	Correct	457 ms	79724 KB	Output is correct
63	Correct	423 ms	74056 KB	Output is correct
64	Correct	442 ms	75480 KB	Output is correct
65	Correct	431 ms	74096 KB	Output is correct
66	Correct	429 ms	75460 KB	Output is correct
67	Correct	437 ms	74240 KB	Output is correct
68	Correct	423 ms	75576 KB	Output is correct
69	Correct	455 ms	76280 KB	Output is correct
70	Correct	442 ms	75348 KB	Output is correct
71	Correct	394 ms	74624 KB	Output is correct
72	Correct	357 ms	76096 KB	Output is correct
73	Correct	471 ms	79892 KB	Output is correct
74	Correct	295 ms	76604 KB	Output is correct