Submission #871767

#	Time	Username	Problem	Language	Result	Execution time	Memory
871767		AmirAli_H1	Reconstruction Project (JOI22_reconstruction)	C++17	42 / 100	5075 ms	413296 KiB

reconstruction

// In the name of Allah

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

typedef 	long long int			ll;
typedef 	long double				ld;
typedef 	pair<int, int>			pii;
typedef 	pair<ll, ll>			pll;

#define 	all(x)					(x).begin(),(x).end()
#define 	len(x)					((ll) (x).size())
#define 	F						first
#define 	S						second
#define 	pb						push_back
#define 	sep						' '
#define 	endl					'\n'
#define 	Mp						make_pair
#define 	kill(x)					cout << x << '\n', exit(0)
#define 	set_dec(x)				cout << fixed << setprecision(x);
#define 	file_io(x,y)			freopen(x, "r", stdin); freopen(y, "w", stdout);

int n, m, q;
const int maxn = 1e5 + 7;
const int maxm = 500 + 7;
const ll oo = 1e18 + 3;
int p[maxn], sz[maxn];
int E1[maxn][maxm], s1[maxn];
int E2[maxn][maxm], s2[maxn];
vector<int> A[maxn]; vector<ll> arr;
vector<pair<pii, int>> E;

int GI(ll x) {
	return lower_bound(all(arr), x) - arr.begin();
}

int get(int a) {
	return (p[a] == a) ? a : p[a] = get(p[a]);
}

bool merge(int a, int b) {
	a = get(a); b = get(b);
	if (a == b) return 0;
	if (sz[a] > sz[b]) swap(a, b);
	p[a] = b; sz[b] += sz[a]; sz[a] = 0;
	return 1;
}

int main() {
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	
	cin >> n >> m;
	for (int i = 0; i < m; i++) {
		int u, v, w;
		cin >> u >> v >> w; u--; v--;
		E.pb(Mp(Mp(u, v), w)); arr.pb(w);
	}
	arr.pb(-oo); arr.pb(oo);
	sort(all(arr)); arr.resize(unique(all(arr)) - arr.begin());
	
	for (int i = 0; i < m; i++) {
		E[i].S = GI(E[i].S);
		A[E[i].S].pb(i);
	}
	
	for (int i = 0; i < len(arr); i++) {
		iota(p, p + n, 0); fill(sz, sz + n, 1);
		for (int j : A[i]) {
			int u = E[j].F.F, v = E[j].F.S;
			if (merge(u, v)) E1[i][s1[i]++] = j;
		}
		if (i - 1 >= 0) {
			for (int r = 0; r < s1[i - 1]; r++) {
				int j = E1[i - 1][r];
				int u = E[j].F.F, v = E[j].F.S;
				if (merge(u, v)) E1[i][s1[i]++] = j;
			}
		}
	}
	for (int i = len(arr) - 1; i >= 0; i--) {
		iota(p, p + n, 0); fill(sz, sz + n, 1);
		for (int j : A[i]) {
			int u = E[j].F.F, v = E[j].F.S;
			if (merge(u, v)) E2[i][s2[i]++] = j;
		}
		if (i + 1 < len(arr)) {
			for (int r = 0; r < s2[i + 1]; r++) {
				int j = E2[i + 1][r];
				int u = E[j].F.F, v = E[j].F.S;
				if (merge(u, v)) E2[i][s2[i]++] = j;
			}
		}
	}
	
	cin >> q;
	while (q--) {
		ll x;
		cin >> x;
		int j = GI(x);
		
		ll ans = 0;
		int p1 = 0, p2 = 0;
		iota(p, p + n, 0); fill(sz, sz + n, 1);
		while (p1 < s1[j - 1] && p2 < s2[j]) {
			int r1 = E1[j - 1][p1], r2 = E2[j][p2];
			ll w1 = x - arr[E[r1].S], w2 = arr[E[r2].S] - x;
			if (w1 < w2) {
				ans += merge(E[r1].F.F, E[r1].F.S) * w1; p1++;
			}
			else {
				ans += merge(E[r2].F.F, E[r2].F.S) * w2; p2++;
			}
		}
		while (p1 < s1[j - 1]) {
			int r1 = E1[j - 1][p1]; ll w1 = x - arr[E[r1].S];
			ans += merge(E[r1].F.F, E[r1].F.S) * w1; p1++;
		}
		while (p2 < s2[j]) {
			int r2 = E2[j][p2]; ll w2 = arr[E[r2].S] - x;
			ans += merge(E[r2].F.F, E[r2].F.S) * w2; p2++;
		}
		cout << ans << endl;
	}
	
	return 0;
}

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 0 / 7
• Subtask 4: 0 / 28
• Subtask 5: 35 / 35
• Subtask 6: 0 / 23