oj.uz

Submission #47262

# Submission time Handle Problem Language Result Execution time Memory
47262 2018-04-30T01:57:07 Z jun6873 Evacuation plan (IZhO18_plan) C++11
100 / 100
 1442 ms 27336 KB 
#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pint;
#define x first
#define y second

const int maxn = 100004, inf = 1e9 + 7;
int n, e, k, q, d[maxn], ans[maxn];
pint dp[maxn];
vector<pint> g[maxn];
priority_queue<pint, vector<pint>, greater<pint> > pq;
struct query {
	int i, l, r, x, y;
} a[maxn];

int p[maxn];
void dsu_init() { iota(p, p+maxn, 0); }
int root(int x) { return p[x]!=x ? p[x] = root(p[x]) : x; }
bool connect(int x, int y) {
	x = root(x); y = root(y);
	if (x==y) return false;
	p[x] = y;
	return true;
}

int main() {
	ios_base::sync_with_stdio(0); cin.tie(0);

	cin >> n >> e;
	for (int i=0; i<e; i++) {
		int x, y, z;
		cin >> x >> y >> z;
		g[x].emplace_back(y, z);
		g[y].emplace_back(x, z);
	}

	for (int i=1; i<=n; i++) d[i] = inf;
	cin >> k;
	for (int i=0; i<k; i++) {
		int x; cin >> x;
		d[x] = 0;
		pq.emplace(0, x);
	}

	while (!pq.empty()) {
		int nd = pq.top().x, nk = pq.top().y; pq.pop();
		if (d[nk] < nd) continue;
		for (pint i : g[nk]) if (nd + i.y < d[i.x]) {
			d[i.x] = nd + i.y;
			pq.emplace(nd + i.y, i.x);
		}
	}

	for (int i=0; i<n; i++) dp[i] = pint(d[i+1], i+1);
	sort(dp, dp+n);

	cin >> q;
	for (int i=0; i<q; i++) {
		int x, y;
		cin >> x >> y;
		a[i] = (query){i, 0, inf, x, y};
	}

	for (int _=0; _<31; _++) {
		sort(a, a+q, [](query a, query b) { return (a.l+a.r)/2 < (b.l+b.r)/2; });
		dsu_init();
		for (int i=q-1, j=n-1; ~i; i--) {
			int m = (a[i].l + a[i].r) / 2;
			while (j>=0 and dp[j].x >= m) {
				for (pint k : g[dp[j].y]) if (d[k.x] >= m) connect(dp[j].y, k.x);
				j--;
			}
			if (root(a[i].x) == root(a[i].y)) a[i].l = m;
			else a[i].r = m;
		}
	}

	for (int i=0; i<q; i++) ans[a[i].i] = a[i].l;
	for (int i=0; i<q; i++) cout << ans[i] << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3064 KB Output is correct
2 Correct 8 ms 3192 KB Output is correct
3 Correct 8 ms 3192 KB Output is correct
4 Correct 6 ms 3108 KB Output is correct
5 Correct 8 ms 3292 KB Output is correct
6 Correct 8 ms 3196 KB Output is correct
7 Correct 7 ms 3068 KB Output is correct
8 Correct 7 ms 3064 KB Output is correct
9 Correct 8 ms 3232 KB Output is correct
10 Correct 8 ms 3192 KB Output is correct
11 Correct 9 ms 3180 KB Output is correct
12 Correct 7 ms 3192 KB Output is correct
13 Correct 8 ms 3192 KB Output is correct
14 Correct 8 ms 3192 KB Output is correct
15 Correct 8 ms 3164 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3064 KB Output is correct
2 Correct 8 ms 3192 KB Output is correct
3 Correct 8 ms 3192 KB Output is correct
4 Correct 6 ms 3108 KB Output is correct
5 Correct 8 ms 3292 KB Output is correct
6 Correct 8 ms 3196 KB Output is correct
7 Correct 7 ms 3068 KB Output is correct
8 Correct 7 ms 3064 KB Output is correct
9 Correct 8 ms 3232 KB Output is correct
10 Correct 8 ms 3192 KB Output is correct
11 Correct 9 ms 3180 KB Output is correct
12 Correct 7 ms 3192 KB Output is correct
13 Correct 8 ms 3192 KB Output is correct
14 Correct 8 ms 3192 KB Output is correct
15 Correct 8 ms 3164 KB Output is correct
16 Correct 480 ms 12932 KB Output is correct
17 Correct 1335 ms 25192 KB Output is correct
18 Correct 78 ms 5624 KB Output is correct
19 Correct 295 ms 13484 KB Output is correct
20 Correct 1373 ms 25472 KB Output is correct
21 Correct 479 ms 16488 KB Output is correct
22 Correct 749 ms 12896 KB Output is correct
23 Correct 1383 ms 25860 KB Output is correct
24 Correct 1251 ms 27336 KB Output is correct
25 Correct 1139 ms 27168 KB Output is correct
26 Correct 266 ms 14484 KB Output is correct
27 Correct 295 ms 14024 KB Output is correct
28 Correct 272 ms 14148 KB Output is correct
29 Correct 298 ms 14180 KB Output is correct
30 Correct 307 ms 14888 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3036 KB Output is correct
2 Correct 6 ms 3064 KB Output is correct
3 Correct 6 ms 3064 KB Output is correct
4 Correct 6 ms 3064 KB Output is correct
5 Correct 6 ms 3064 KB Output is correct
6 Correct 7 ms 3112 KB Output is correct
7 Correct 6 ms 3064 KB Output is correct
8 Correct 6 ms 3064 KB Output is correct
9 Correct 6 ms 3064 KB Output is correct
10 Correct 6 ms 3064 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 453 ms 11276 KB Output is correct
2 Correct 922 ms 23328 KB Output is correct
3 Correct 933 ms 23200 KB Output is correct
4 Correct 320 ms 9260 KB Output is correct
5 Correct 1207 ms 23408 KB Output is correct
6 Correct 796 ms 23864 KB Output is correct
7 Correct 822 ms 23836 KB Output is correct
8 Correct 644 ms 24020 KB Output is correct
9 Correct 780 ms 23028 KB Output is correct
10 Correct 1131 ms 23128 KB Output is correct
11 Correct 1215 ms 22712 KB Output is correct
12 Correct 1074 ms 23084 KB Output is correct
13 Correct 1069 ms 22728 KB Output is correct
14 Correct 707 ms 22768 KB Output is correct
15 Correct 1008 ms 22960 KB Output is correct
16 Correct 973 ms 22988 KB Output is correct
17 Correct 647 ms 22892 KB Output is correct
18 Correct 662 ms 23300 KB Output is correct
19 Correct 78 ms 8284 KB Output is correct
20 Correct 997 ms 23280 KB Output is correct
21 Correct 548 ms 22248 KB Output is correct
22 Correct 132 ms 10720 KB Output is correct
23 Correct 209 ms 9464 KB Output is correct
24 Correct 110 ms 10300 KB Output is correct
25 Correct 118 ms 10312 KB Output is correct
26 Correct 206 ms 9320 KB Output is correct
27 Correct 272 ms 9436 KB Output is correct
28 Correct 109 ms 10728 KB Output is correct
29 Correct 404 ms 9812 KB Output is correct
30 Correct 107 ms 10576 KB Output is correct
31 Correct 385 ms 9452 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3064 KB Output is correct
2 Correct 8 ms 3192 KB Output is correct
3 Correct 8 ms 3192 KB Output is correct
4 Correct 6 ms 3108 KB Output is correct
5 Correct 8 ms 3292 KB Output is correct
6 Correct 8 ms 3196 KB Output is correct
7 Correct 7 ms 3068 KB Output is correct
8 Correct 7 ms 3064 KB Output is correct
9 Correct 8 ms 3232 KB Output is correct
10 Correct 8 ms 3192 KB Output is correct
11 Correct 9 ms 3180 KB Output is correct
12 Correct 7 ms 3192 KB Output is correct
13 Correct 8 ms 3192 KB Output is correct
14 Correct 8 ms 3192 KB Output is correct
15 Correct 8 ms 3164 KB Output is correct
16 Correct 480 ms 12932 KB Output is correct
17 Correct 1335 ms 25192 KB Output is correct
18 Correct 78 ms 5624 KB Output is correct
19 Correct 295 ms 13484 KB Output is correct
20 Correct 1373 ms 25472 KB Output is correct
21 Correct 479 ms 16488 KB Output is correct
22 Correct 749 ms 12896 KB Output is correct
23 Correct 1383 ms 25860 KB Output is correct
24 Correct 1251 ms 27336 KB Output is correct
25 Correct 1139 ms 27168 KB Output is correct
26 Correct 266 ms 14484 KB Output is correct
27 Correct 295 ms 14024 KB Output is correct
28 Correct 272 ms 14148 KB Output is correct
29 Correct 298 ms 14180 KB Output is correct
30 Correct 307 ms 14888 KB Output is correct
31 Correct 6 ms 3036 KB Output is correct
32 Correct 6 ms 3064 KB Output is correct
33 Correct 6 ms 3064 KB Output is correct
34 Correct 6 ms 3064 KB Output is correct
35 Correct 6 ms 3064 KB Output is correct
36 Correct 7 ms 3112 KB Output is correct
37 Correct 6 ms 3064 KB Output is correct
38 Correct 6 ms 3064 KB Output is correct
39 Correct 6 ms 3064 KB Output is correct
40 Correct 6 ms 3064 KB Output is correct
41 Correct 453 ms 11276 KB Output is correct
42 Correct 922 ms 23328 KB Output is correct
43 Correct 933 ms 23200 KB Output is correct
44 Correct 320 ms 9260 KB Output is correct
45 Correct 1207 ms 23408 KB Output is correct
46 Correct 796 ms 23864 KB Output is correct
47 Correct 822 ms 23836 KB Output is correct
48 Correct 644 ms 24020 KB Output is correct
49 Correct 780 ms 23028 KB Output is correct
50 Correct 1131 ms 23128 KB Output is correct
51 Correct 1215 ms 22712 KB Output is correct
52 Correct 1074 ms 23084 KB Output is correct
53 Correct 1069 ms 22728 KB Output is correct
54 Correct 707 ms 22768 KB Output is correct
55 Correct 1008 ms 22960 KB Output is correct
56 Correct 973 ms 22988 KB Output is correct
57 Correct 647 ms 22892 KB Output is correct
58 Correct 662 ms 23300 KB Output is correct
59 Correct 78 ms 8284 KB Output is correct
60 Correct 997 ms 23280 KB Output is correct
61 Correct 548 ms 22248 KB Output is correct
62 Correct 132 ms 10720 KB Output is correct
63 Correct 209 ms 9464 KB Output is correct
64 Correct 110 ms 10300 KB Output is correct
65 Correct 118 ms 10312 KB Output is correct
66 Correct 206 ms 9320 KB Output is correct
67 Correct 272 ms 9436 KB Output is correct
68 Correct 109 ms 10728 KB Output is correct
69 Correct 404 ms 9812 KB Output is correct
70 Correct 107 ms 10576 KB Output is correct
71 Correct 385 ms 9452 KB Output is correct
72 Correct 870 ms 16844 KB Output is correct
73 Correct 1332 ms 26912 KB Output is correct
74 Correct 1442 ms 26608 KB Output is correct
75 Correct 1296 ms 26180 KB Output is correct
76 Correct 1299 ms 26300 KB Output is correct
77 Correct 1280 ms 25728 KB Output is correct
78 Correct 1276 ms 25696 KB Output is correct
79 Correct 1311 ms 25392 KB Output is correct
80 Correct 1309 ms 22952 KB Output is correct
81 Correct 1304 ms 23356 KB Output is correct
82 Correct 1246 ms 22164 KB Output is correct
83 Correct 1205 ms 22320 KB Output is correct
84 Correct 1158 ms 22164 KB Output is correct
85 Correct 1124 ms 22144 KB Output is correct
86 Correct 1233 ms 22176 KB Output is correct
87 Correct 1243 ms 22160 KB Output is correct
88 Correct 1342 ms 22160 KB Output is correct
89 Correct 778 ms 11768 KB Output is correct
90 Correct 1320 ms 25024 KB Output is correct
91 Correct 741 ms 24860 KB Output is correct
92 Correct 336 ms 15372 KB Output is correct
93 Correct 604 ms 13160 KB Output is correct
94 Correct 281 ms 14604 KB Output is correct
95 Correct 282 ms 14952 KB Output is correct
96 Correct 470 ms 12488 KB Output is correct
97 Correct 740 ms 12916 KB Output is correct
98 Correct 279 ms 13728 KB Output is correct
99 Correct 744 ms 13096 KB Output is correct
100 Correct 300 ms 15260 KB Output is correct