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답안 #348827

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
348827 2021-01-15T20:23:44 Z denkendoemeer 다리 (APIO19_bridges) C++14
100 / 100
 2756 ms 49880 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define rep(i, a, b) for (auto i = (a); i < (b); ++i)
#define eb(x...) emplace_back(x)
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) int((x).size())
 
const int N = 1 << 16, 	M = 1 << 17, Q = M, B = 1 << 10;
 
int nxt[N], sz[N]; stack<int> save;
int head(int u) { return nxt[u] < 0 ? u : head(nxt[u]); }
void unite(int u, int v) {
	u = head(u); v = head(v);
	if (u == v) return save.push(-1);
	if (sz[u] > sz[v]) swap(u, v);
	nxt[u] = v; sz[v] += sz[u]; save.push(u);
}
void rollback() {
	int u = save.top(); save.pop();
	if (u < 0) return;
	sz[nxt[u]] -= sz[u]; nxt[u] = -1;
}
 
int u[M], v[M], w[M], ord[M];
short t[Q]; int b[Q], c[Q];
 
int ans[Q];
 
bool changed[M];
vector<int> changed_edges;
vector<tuple<int, int, int>> queries;
vector<pair<int, int>> weights[M];
 
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
 
	int n, m;
	cin >> n >> m;
	rep(e, 0, m) cin >> u[e] >> v[e] >> w[e], --u[e], --v[e];
 
	int q; cin >> q;
	rep(i, 0, q) cin >> t[i] >> b[i] >> c[i], --b[i], --t[i];
 
	for (int l = 0, r = 0; r = min(l + B, q), l < q; l += B) {
		fill(nxt, nxt + n, -1); fill(sz, sz + n, 1);
		fill(changed, changed + m, false); changed_edges.clear();
		queries.clear();
		iota(ord, ord + m, 0); sort(ord, ord + m, [&](int x, int y) { return w[x] > w[y]; });
 
		rep(i, l, r)
			if (t[i]) queries.eb(c[i], b[i], i);
			else changed[b[i]] = true;
		
		rep(e, 0, m) if (changed[e]) weights[e] = {{w[e], 0}}, changed_edges.eb(e);
		rep(i, l, r) if (!t[i]) weights[b[i]].eb(c[i], i);
		sort(rall(queries));
 
		int e = 0;
		for (auto &[z, s, t] : queries) {
			while (e < m && z <= w[ord[e]]) { if (!changed[ord[e]]) unite(u[ord[e]], v[ord[e]]); ++e; }
			int dsu_changes = 0;
			for (auto e : changed_edges) {
				int c = 0;
				while (c < sz(weights[e]) && weights[e][c].second <= t) ++c;
				--c; if (z <= weights[e][c].first) unite(u[e], v[e]), ++dsu_changes;
			}
			ans[t] = sz[head(s)];
			while (dsu_changes--) rollback();
		}
		
		rep(i, l, r) if (!t[i]) w[b[i]] = c[i];
	}
	rep(i, 0, q) if (t[i]) cout << ans[i] << '\n';
}

Compilation message

bridges.cpp: In function 'int main()':
bridges.cpp:62:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   62 |   for (auto &[z, s, t] : queries) {
      |              ^

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 3436 KB Output is correct
2 Correct 2 ms 3436 KB Output is correct
3 Correct 49 ms 3692 KB Output is correct
4 Correct 6 ms 3692 KB Output is correct
5 Correct 19 ms 3692 KB Output is correct
6 Correct 17 ms 3692 KB Output is correct
7 Correct 19 ms 3692 KB Output is correct
8 Correct 19 ms 3692 KB Output is correct
9 Correct 20 ms 3692 KB Output is correct
10 Correct 19 ms 3692 KB Output is correct
11 Correct 18 ms 3692 KB Output is correct
12 Correct 20 ms 3692 KB Output is correct
13 Correct 27 ms 3720 KB Output is correct
14 Correct 25 ms 3692 KB Output is correct
15 Correct 21 ms 3692 KB Output is correct
16 Correct 20 ms 3692 KB Output is correct
17 Correct 20 ms 3692 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1549 ms 27288 KB Output is correct
2 Correct 1560 ms 27040 KB Output is correct
3 Correct 1570 ms 27060 KB Output is correct
4 Correct 1527 ms 26992 KB Output is correct
5 Correct 1523 ms 27336 KB Output is correct
6 Correct 2139 ms 27296 KB Output is correct
7 Correct 2107 ms 27312 KB Output is correct
8 Correct 2141 ms 27308 KB Output is correct
9 Correct 40 ms 5100 KB Output is correct
10 Correct 1290 ms 27272 KB Output is correct
11 Correct 1231 ms 27168 KB Output is correct
12 Correct 1232 ms 27040 KB Output is correct
13 Correct 1276 ms 27300 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1263 ms 19580 KB Output is correct
2 Correct 904 ms 8692 KB Output is correct
3 Correct 1405 ms 19836 KB Output is correct
4 Correct 1240 ms 19708 KB Output is correct
5 Correct 40 ms 5100 KB Output is correct
6 Correct 1357 ms 19836 KB Output is correct
7 Correct 1162 ms 19768 KB Output is correct
8 Correct 1041 ms 19708 KB Output is correct
9 Correct 756 ms 19580 KB Output is correct
10 Correct 697 ms 19324 KB Output is correct
11 Correct 834 ms 19452 KB Output is correct
12 Correct 774 ms 19452 KB Output is correct

Subtask #4
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1670 ms 47576 KB Output is correct
2 Correct 40 ms 5100 KB Output is correct
3 Correct 178 ms 9452 KB Output is correct
4 Correct 89 ms 9452 KB Output is correct
5 Correct 830 ms 47728 KB Output is correct
6 Correct 1627 ms 47600 KB Output is correct
7 Correct 825 ms 47872 KB Output is correct
8 Correct 768 ms 26596 KB Output is correct
9 Correct 752 ms 26392 KB Output is correct
10 Correct 761 ms 26640 KB Output is correct
11 Correct 1210 ms 36976 KB Output is correct
12 Correct 1192 ms 36880 KB Output is correct
13 Correct 1225 ms 37232 KB Output is correct
14 Correct 758 ms 47736 KB Output is correct
15 Correct 800 ms 47728 KB Output is correct
16 Correct 1656 ms 47328 KB Output is correct
17 Correct 1664 ms 47472 KB Output is correct
18 Correct 1656 ms 47472 KB Output is correct
19 Correct 1658 ms 47344 KB Output is correct
20 Correct 1379 ms 40816 KB Output is correct
21 Correct 1378 ms 40832 KB Output is correct
22 Correct 1595 ms 45844 KB Output is correct
23 Correct 923 ms 39536 KB Output is correct

Subtask #5
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1549 ms 27288 KB Output is correct
2 Correct 1560 ms 27040 KB Output is correct
3 Correct 1570 ms 27060 KB Output is correct
4 Correct 1527 ms 26992 KB Output is correct
5 Correct 1523 ms 27336 KB Output is correct
6 Correct 2139 ms 27296 KB Output is correct
7 Correct 2107 ms 27312 KB Output is correct
8 Correct 2141 ms 27308 KB Output is correct
9 Correct 40 ms 5100 KB Output is correct
10 Correct 1290 ms 27272 KB Output is correct
11 Correct 1231 ms 27168 KB Output is correct
12 Correct 1232 ms 27040 KB Output is correct
13 Correct 1276 ms 27300 KB Output is correct
14 Correct 1263 ms 19580 KB Output is correct
15 Correct 904 ms 8692 KB Output is correct
16 Correct 1405 ms 19836 KB Output is correct
17 Correct 1240 ms 19708 KB Output is correct
18 Correct 40 ms 5100 KB Output is correct
19 Correct 1357 ms 19836 KB Output is correct
20 Correct 1162 ms 19768 KB Output is correct
21 Correct 1041 ms 19708 KB Output is correct
22 Correct 756 ms 19580 KB Output is correct
23 Correct 697 ms 19324 KB Output is correct
24 Correct 834 ms 19452 KB Output is correct
25 Correct 774 ms 19452 KB Output is correct
26 Correct 1643 ms 27304 KB Output is correct
27 Correct 1996 ms 27208 KB Output is correct
28 Correct 1686 ms 27612 KB Output is correct
29 Correct 1260 ms 27008 KB Output is correct
30 Correct 1870 ms 27424 KB Output is correct
31 Correct 1915 ms 27424 KB Output is correct
32 Correct 1930 ms 27296 KB Output is correct
33 Correct 1639 ms 27296 KB Output is correct
34 Correct 1652 ms 27196 KB Output is correct
35 Correct 1663 ms 27168 KB Output is correct
36 Correct 1312 ms 27092 KB Output is correct
37 Correct 1288 ms 27228 KB Output is correct
38 Correct 1276 ms 27040 KB Output is correct
39 Correct 929 ms 26656 KB Output is correct
40 Correct 928 ms 26660 KB Output is correct
41 Correct 922 ms 26528 KB Output is correct
42 Correct 976 ms 26528 KB Output is correct
43 Correct 979 ms 26784 KB Output is correct
44 Correct 975 ms 26528 KB Output is correct

Subtask #6
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 3436 KB Output is correct
2 Correct 2 ms 3436 KB Output is correct
3 Correct 49 ms 3692 KB Output is correct
4 Correct 6 ms 3692 KB Output is correct
5 Correct 19 ms 3692 KB Output is correct
6 Correct 17 ms 3692 KB Output is correct
7 Correct 19 ms 3692 KB Output is correct
8 Correct 19 ms 3692 KB Output is correct
9 Correct 20 ms 3692 KB Output is correct
10 Correct 19 ms 3692 KB Output is correct
11 Correct 18 ms 3692 KB Output is correct
12 Correct 20 ms 3692 KB Output is correct
13 Correct 27 ms 3720 KB Output is correct
14 Correct 25 ms 3692 KB Output is correct
15 Correct 21 ms 3692 KB Output is correct
16 Correct 20 ms 3692 KB Output is correct
17 Correct 20 ms 3692 KB Output is correct
18 Correct 1549 ms 27288 KB Output is correct
19 Correct 1560 ms 27040 KB Output is correct
20 Correct 1570 ms 27060 KB Output is correct
21 Correct 1527 ms 26992 KB Output is correct
22 Correct 1523 ms 27336 KB Output is correct
23 Correct 2139 ms 27296 KB Output is correct
24 Correct 2107 ms 27312 KB Output is correct
25 Correct 2141 ms 27308 KB Output is correct
26 Correct 40 ms 5100 KB Output is correct
27 Correct 1290 ms 27272 KB Output is correct
28 Correct 1231 ms 27168 KB Output is correct
29 Correct 1232 ms 27040 KB Output is correct
30 Correct 1276 ms 27300 KB Output is correct
31 Correct 1263 ms 19580 KB Output is correct
32 Correct 904 ms 8692 KB Output is correct
33 Correct 1405 ms 19836 KB Output is correct
34 Correct 1240 ms 19708 KB Output is correct
35 Correct 40 ms 5100 KB Output is correct
36 Correct 1357 ms 19836 KB Output is correct
37 Correct 1162 ms 19768 KB Output is correct
38 Correct 1041 ms 19708 KB Output is correct
39 Correct 756 ms 19580 KB Output is correct
40 Correct 697 ms 19324 KB Output is correct
41 Correct 834 ms 19452 KB Output is correct
42 Correct 774 ms 19452 KB Output is correct
43 Correct 1670 ms 47576 KB Output is correct
44 Correct 40 ms 5100 KB Output is correct
45 Correct 178 ms 9452 KB Output is correct
46 Correct 89 ms 9452 KB Output is correct
47 Correct 830 ms 47728 KB Output is correct
48 Correct 1627 ms 47600 KB Output is correct
49 Correct 825 ms 47872 KB Output is correct
50 Correct 768 ms 26596 KB Output is correct
51 Correct 752 ms 26392 KB Output is correct
52 Correct 761 ms 26640 KB Output is correct
53 Correct 1210 ms 36976 KB Output is correct
54 Correct 1192 ms 36880 KB Output is correct
55 Correct 1225 ms 37232 KB Output is correct
56 Correct 758 ms 47736 KB Output is correct
57 Correct 800 ms 47728 KB Output is correct
58 Correct 1656 ms 47328 KB Output is correct
59 Correct 1664 ms 47472 KB Output is correct
60 Correct 1656 ms 47472 KB Output is correct
61 Correct 1658 ms 47344 KB Output is correct
62 Correct 1379 ms 40816 KB Output is correct
63 Correct 1378 ms 40832 KB Output is correct
64 Correct 1595 ms 45844 KB Output is correct
65 Correct 923 ms 39536 KB Output is correct
66 Correct 1643 ms 27304 KB Output is correct
67 Correct 1996 ms 27208 KB Output is correct
68 Correct 1686 ms 27612 KB Output is correct
69 Correct 1260 ms 27008 KB Output is correct
70 Correct 1870 ms 27424 KB Output is correct
71 Correct 1915 ms 27424 KB Output is correct
72 Correct 1930 ms 27296 KB Output is correct
73 Correct 1639 ms 27296 KB Output is correct
74 Correct 1652 ms 27196 KB Output is correct
75 Correct 1663 ms 27168 KB Output is correct
76 Correct 1312 ms 27092 KB Output is correct
77 Correct 1288 ms 27228 KB Output is correct
78 Correct 1276 ms 27040 KB Output is correct
79 Correct 929 ms 26656 KB Output is correct
80 Correct 928 ms 26660 KB Output is correct
81 Correct 922 ms 26528 KB Output is correct
82 Correct 976 ms 26528 KB Output is correct
83 Correct 979 ms 26784 KB Output is correct
84 Correct 975 ms 26528 KB Output is correct
85 Correct 2552 ms 48324 KB Output is correct
86 Correct 244 ms 9512 KB Output is correct
87 Correct 172 ms 9452 KB Output is correct
88 Correct 1707 ms 48496 KB Output is correct
89 Correct 2548 ms 48348 KB Output is correct
90 Correct 1716 ms 48368 KB Output is correct
91 Correct 1701 ms 27420 KB Output is correct
92 Correct 1684 ms 27112 KB Output is correct
93 Correct 2310 ms 27204 KB Output is correct
94 Correct 2181 ms 37872 KB Output is correct
95 Correct 2137 ms 37616 KB Output is correct
96 Correct 2545 ms 37744 KB Output is correct
97 Correct 1086 ms 47856 KB Output is correct
98 Correct 1241 ms 48240 KB Output is correct
99 Correct 2591 ms 47984 KB Output is correct
100 Correct 2611 ms 47796 KB Output is correct
101 Correct 2595 ms 48112 KB Output is correct
102 Correct 2592 ms 48112 KB Output is correct
103 Correct 2756 ms 41328 KB Output is correct
104 Correct 2745 ms 41200 KB Output is correct
105 Correct 1950 ms 44660 KB Output is correct
106 Correct 1530 ms 40944 KB Output is correct
107 Correct 1806 ms 44144 KB Output is correct
108 Correct 2709 ms 49880 KB Output is correct
109 Correct 2025 ms 41840 KB Output is correct