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Submission #374897

# Submission time Handle Problem Language Result Execution time Memory
374897 2021-03-08T13:25:27 Z SeDunion Evacuation plan (IZhO18_plan) C++17
100 / 100
 2480 ms 103916 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 1e6 + 66;
 
vector<pair<int,int>>g[N];
 
int d[N], s[N], t[N], l[N], r[N], p[N];
 
int get(int x) {
	if (x == p[x]) return x;
	return p[x] = get(p[x]);
}
 
vector<int>ask[N];
 
vector<int>add[N];
 
int sq[N];
 
int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	int n, m;
	cin >> n >> m;
	for (int i = 1 ; i <= m ; ++ i) {
		int a, b, w;
		cin >> a >> b >> w;
		g[a].emplace_back(b, w);
		g[b].emplace_back(a, w);
	}
	for (int i = 1 ; i <= n ; ++ i) {
		d[i] = int(1e9+123);
	}
	int k;
	cin >> k;
	set<pair<int,int>>S;
	for (int i = 1 ; i <= k ; ++ i) {
		int x;
		cin >> x;
		d[x] = 0;
		S.insert({0, x});
	}
	while(S.size()) {
		int v = S.begin()->second; S.erase(S.begin());
		for (auto [to, w] : g[v]) if (d[to] > d[v] + w) {
			S.erase({d[to], to});
			d[to] = d[v] + w;
			S.insert({d[to], to});
		}
	}
	for (int i = 1 ; i <= n ; ++ i) {
		//cout << d[i] << " \n"[i == n];
	}
	vector<int>vals;
	for (int i = 1 ; i <= n ; ++ i) {
		vals.emplace_back(d[i]);
	}
	sort(vals.begin(), vals.end()), vals.resize(unique(vals.begin(), vals.end()) - vals.begin());
	for (int i = 1 ; i <= n ; ++ i) {
		sq[i] = lower_bound(vals.begin(), vals.end(), d[i]) - vals.begin();
		add[sq[i]].emplace_back(i);
	}
	int q;
	cin >> q;
	for (int i = 1 ; i <= q ; ++ i) {
		cin >> s[i] >> t[i];
		l[i] = 0, r[i] = (int)vals.size() - 1;
	}
	for (int rep = 0 ; rep < 30 ; ++ rep) {
		for (int i = 0 ; i < N ; ++ i) {
			ask[i].clear();
		}
		for (int i = 1 ; i <= q ; ++ i) {
			if (l[i] < r[i]) {
				int m = (l[i] + r[i] + 1) / 2;
				ask[m].emplace_back(i);
			}
		}
		for (int i = 1 ; i <= n ; ++ i) {
			p[i] = i;
		}
		for (int i = (int)vals.size() - 1 ; i >= 0 ; -- i) {
			for (int v : add[i]) {
				for (auto [to, w] : g[v]) {
					if (d[to] >= vals[i]) {
						p[get(v)] = get(to);
					}
				}
			}
			for (auto j : ask[i]) {
				if (get(s[j]) == get(t[j])) {
					l[j] = i;
				} else {
					r[j] = i - 1;
				}
			}
		}
	}
	for (int i = 1 ; i <= q ; ++ i) {
		cout << vals[l[i]] << "\n";
	}
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 71020 KB Output is correct
2 Correct 122 ms 71020 KB Output is correct
3 Correct 119 ms 71020 KB Output is correct
4 Correct 118 ms 71020 KB Output is correct
5 Correct 118 ms 71072 KB Output is correct
6 Correct 135 ms 71148 KB Output is correct
7 Correct 122 ms 70892 KB Output is correct
8 Correct 113 ms 70892 KB Output is correct
9 Correct 123 ms 71020 KB Output is correct
10 Correct 120 ms 71152 KB Output is correct
11 Correct 118 ms 71088 KB Output is correct
12 Correct 118 ms 71148 KB Output is correct
13 Correct 117 ms 71040 KB Output is correct
14 Correct 120 ms 71020 KB Output is correct
15 Correct 121 ms 71020 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 71020 KB Output is correct
2 Correct 122 ms 71020 KB Output is correct
3 Correct 119 ms 71020 KB Output is correct
4 Correct 118 ms 71020 KB Output is correct
5 Correct 118 ms 71072 KB Output is correct
6 Correct 135 ms 71148 KB Output is correct
7 Correct 122 ms 70892 KB Output is correct
8 Correct 113 ms 70892 KB Output is correct
9 Correct 123 ms 71020 KB Output is correct
10 Correct 120 ms 71152 KB Output is correct
11 Correct 118 ms 71088 KB Output is correct
12 Correct 118 ms 71148 KB Output is correct
13 Correct 117 ms 71040 KB Output is correct
14 Correct 120 ms 71020 KB Output is correct
15 Correct 121 ms 71020 KB Output is correct
16 Correct 836 ms 87400 KB Output is correct
17 Correct 2314 ms 103668 KB Output is correct
18 Correct 230 ms 73836 KB Output is correct
19 Correct 431 ms 89056 KB Output is correct
20 Correct 2480 ms 103736 KB Output is correct
21 Correct 1359 ms 91004 KB Output is correct
22 Correct 1008 ms 94124 KB Output is correct
23 Correct 2431 ms 103600 KB Output is correct
24 Correct 2389 ms 103728 KB Output is correct
25 Correct 2324 ms 103300 KB Output is correct
26 Correct 451 ms 88868 KB Output is correct
27 Correct 469 ms 90552 KB Output is correct
28 Correct 446 ms 89060 KB Output is correct
29 Correct 433 ms 88160 KB Output is correct
30 Correct 448 ms 88728 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 113 ms 70780 KB Output is correct
2 Correct 117 ms 70864 KB Output is correct
3 Correct 109 ms 70892 KB Output is correct
4 Correct 117 ms 70892 KB Output is correct
5 Correct 120 ms 71020 KB Output is correct
6 Correct 114 ms 71168 KB Output is correct
7 Correct 114 ms 70892 KB Output is correct
8 Correct 112 ms 70892 KB Output is correct
9 Correct 112 ms 70892 KB Output is correct
10 Correct 113 ms 70892 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1255 ms 83920 KB Output is correct
2 Correct 2063 ms 96168 KB Output is correct
3 Correct 2100 ms 96364 KB Output is correct
4 Correct 752 ms 80356 KB Output is correct
5 Correct 2055 ms 96420 KB Output is correct
6 Correct 2045 ms 96364 KB Output is correct
7 Correct 2041 ms 96336 KB Output is correct
8 Correct 2084 ms 96236 KB Output is correct
9 Correct 2029 ms 96236 KB Output is correct
10 Correct 2027 ms 96236 KB Output is correct
11 Correct 2020 ms 96236 KB Output is correct
12 Correct 2110 ms 96236 KB Output is correct
13 Correct 2070 ms 96364 KB Output is correct
14 Correct 2029 ms 96364 KB Output is correct
15 Correct 2185 ms 96364 KB Output is correct
16 Correct 2037 ms 96264 KB Output is correct
17 Correct 2177 ms 96236 KB Output is correct
18 Correct 2044 ms 96236 KB Output is correct
19 Correct 671 ms 80356 KB Output is correct
20 Correct 2068 ms 96364 KB Output is correct
21 Correct 2296 ms 97224 KB Output is correct
22 Correct 373 ms 85472 KB Output is correct
23 Correct 592 ms 79716 KB Output is correct
24 Correct 367 ms 83808 KB Output is correct
25 Correct 390 ms 84960 KB Output is correct
26 Correct 562 ms 78952 KB Output is correct
27 Correct 756 ms 80484 KB Output is correct
28 Correct 366 ms 83680 KB Output is correct
29 Correct 746 ms 80356 KB Output is correct
30 Correct 370 ms 83808 KB Output is correct
31 Correct 729 ms 80356 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 71020 KB Output is correct
2 Correct 122 ms 71020 KB Output is correct
3 Correct 119 ms 71020 KB Output is correct
4 Correct 118 ms 71020 KB Output is correct
5 Correct 118 ms 71072 KB Output is correct
6 Correct 135 ms 71148 KB Output is correct
7 Correct 122 ms 70892 KB Output is correct
8 Correct 113 ms 70892 KB Output is correct
9 Correct 123 ms 71020 KB Output is correct
10 Correct 120 ms 71152 KB Output is correct
11 Correct 118 ms 71088 KB Output is correct
12 Correct 118 ms 71148 KB Output is correct
13 Correct 117 ms 71040 KB Output is correct
14 Correct 120 ms 71020 KB Output is correct
15 Correct 121 ms 71020 KB Output is correct
16 Correct 836 ms 87400 KB Output is correct
17 Correct 2314 ms 103668 KB Output is correct
18 Correct 230 ms 73836 KB Output is correct
19 Correct 431 ms 89056 KB Output is correct
20 Correct 2480 ms 103736 KB Output is correct
21 Correct 1359 ms 91004 KB Output is correct
22 Correct 1008 ms 94124 KB Output is correct
23 Correct 2431 ms 103600 KB Output is correct
24 Correct 2389 ms 103728 KB Output is correct
25 Correct 2324 ms 103300 KB Output is correct
26 Correct 451 ms 88868 KB Output is correct
27 Correct 469 ms 90552 KB Output is correct
28 Correct 446 ms 89060 KB Output is correct
29 Correct 433 ms 88160 KB Output is correct
30 Correct 448 ms 88728 KB Output is correct
31 Correct 113 ms 70780 KB Output is correct
32 Correct 117 ms 70864 KB Output is correct
33 Correct 109 ms 70892 KB Output is correct
34 Correct 117 ms 70892 KB Output is correct
35 Correct 120 ms 71020 KB Output is correct
36 Correct 114 ms 71168 KB Output is correct
37 Correct 114 ms 70892 KB Output is correct
38 Correct 112 ms 70892 KB Output is correct
39 Correct 112 ms 70892 KB Output is correct
40 Correct 113 ms 70892 KB Output is correct
41 Correct 1255 ms 83920 KB Output is correct
42 Correct 2063 ms 96168 KB Output is correct
43 Correct 2100 ms 96364 KB Output is correct
44 Correct 752 ms 80356 KB Output is correct
45 Correct 2055 ms 96420 KB Output is correct
46 Correct 2045 ms 96364 KB Output is correct
47 Correct 2041 ms 96336 KB Output is correct
48 Correct 2084 ms 96236 KB Output is correct
49 Correct 2029 ms 96236 KB Output is correct
50 Correct 2027 ms 96236 KB Output is correct
51 Correct 2020 ms 96236 KB Output is correct
52 Correct 2110 ms 96236 KB Output is correct
53 Correct 2070 ms 96364 KB Output is correct
54 Correct 2029 ms 96364 KB Output is correct
55 Correct 2185 ms 96364 KB Output is correct
56 Correct 2037 ms 96264 KB Output is correct
57 Correct 2177 ms 96236 KB Output is correct
58 Correct 2044 ms 96236 KB Output is correct
59 Correct 671 ms 80356 KB Output is correct
60 Correct 2068 ms 96364 KB Output is correct
61 Correct 2296 ms 97224 KB Output is correct
62 Correct 373 ms 85472 KB Output is correct
63 Correct 592 ms 79716 KB Output is correct
64 Correct 367 ms 83808 KB Output is correct
65 Correct 390 ms 84960 KB Output is correct
66 Correct 562 ms 78952 KB Output is correct
67 Correct 756 ms 80484 KB Output is correct
68 Correct 366 ms 83680 KB Output is correct
69 Correct 746 ms 80356 KB Output is correct
70 Correct 370 ms 83808 KB Output is correct
71 Correct 729 ms 80356 KB Output is correct
72 Correct 1404 ms 92072 KB Output is correct
73 Correct 2185 ms 103796 KB Output is correct
74 Correct 2180 ms 103788 KB Output is correct
75 Correct 2196 ms 103748 KB Output is correct
76 Correct 2228 ms 103916 KB Output is correct
77 Correct 2181 ms 103916 KB Output is correct
78 Correct 2206 ms 103916 KB Output is correct
79 Correct 2216 ms 103788 KB Output is correct
80 Correct 2157 ms 103660 KB Output is correct
81 Correct 2205 ms 103788 KB Output is correct
82 Correct 2159 ms 103872 KB Output is correct
83 Correct 2142 ms 103788 KB Output is correct
84 Correct 2144 ms 103656 KB Output is correct
85 Correct 2241 ms 103396 KB Output is correct
86 Correct 2199 ms 103772 KB Output is correct
87 Correct 2167 ms 103792 KB Output is correct
88 Correct 2198 ms 103812 KB Output is correct
89 Correct 883 ms 94436 KB Output is correct
90 Correct 2189 ms 103688 KB Output is correct
91 Correct 2358 ms 103660 KB Output is correct
92 Correct 426 ms 89312 KB Output is correct
93 Correct 785 ms 91236 KB Output is correct
94 Correct 421 ms 89952 KB Output is correct
95 Correct 418 ms 89056 KB Output is correct
96 Correct 705 ms 87908 KB Output is correct
97 Correct 908 ms 92900 KB Output is correct
98 Correct 423 ms 89512 KB Output is correct
99 Correct 892 ms 92988 KB Output is correct
100 Correct 424 ms 89056 KB Output is correct