oj.uz

Submission #758986

# Submission time Handle Problem Language Result Execution time Memory
758986 2023-06-15T16:20:23 Z ymm Stranded Far From Home (BOI22_island) C++17
100 / 100
 249 ms 41128 KB 
#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;

const int N = 200'010;
vector<int> A0[N], A[N];
int val[N];
pii srt[N];
int n, m;

namespace dsu {
	int par[N];
	void init(int n) { fill(par, par+n, -1); }
	int rt(int v) { return par[v] == -1? v: (par[v] = rt(par[v])); }
	bool unite(int v, int u) {
		v = rt(v);
		u = rt(u);
		if (v == u)
			return 0;
		par[u] = v;
		return 1;
	}
}

ll sum[N];
void dfs_sum(int v)
{
	sum[v] = val[v];
	for (int u : A[v]) {
		dfs_sum(u);
		sum[v] += sum[u];
	}
}

bool ans[N];
void dfs_solve(int v, int pv)
{
	if (sum[v] < pv)
		return;
	ans[v] = 1;
	for (int u : A[v])
		dfs_solve(u, val[v]);
}

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	cin >> n >> m;
	Loop (i,0,n) {
		cin >> val[i];
		srt[i] = {val[i], i};
	}
	sort(srt, srt+n);
	Loop (i,0,m) {
		int v, u;
		cin >> v >> u;
		--v; --u;
		A0[v].push_back(u);
		A0[u].push_back(v);
	}
	dsu::init(n);
	Loop (i,0,n) {
		int v = srt[i].second;
		for (int u : A0[v]) {
			if (val[v] < val[u])
				continue;
			if (dsu::rt(v) != dsu::rt(u)) {
				A[v].push_back(dsu::rt(u));
				dsu::unite(v, u);
			}
		}
	}
	dfs_sum(dsu::rt(0));
	dfs_solve(dsu::rt(0), -1);
	Loop (i,0,n)
		cout << ans[i];
	cout << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9716 KB Output is correct
2 Correct 6 ms 9716 KB Output is correct
3 Correct 6 ms 9716 KB Output is correct
4 Correct 7 ms 9860 KB Output is correct
5 Correct 7 ms 9912 KB Output is correct
6 Correct 7 ms 9812 KB Output is correct
7 Correct 7 ms 9812 KB Output is correct
8 Correct 7 ms 9812 KB Output is correct
9 Correct 7 ms 10036 KB Output is correct
10 Correct 8 ms 9912 KB Output is correct
11 Correct 7 ms 9860 KB Output is correct
12 Correct 7 ms 9904 KB Output is correct
13 Correct 7 ms 9940 KB Output is correct
14 Correct 7 ms 9812 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9724 KB Output is correct
2 Correct 6 ms 9732 KB Output is correct
3 Correct 153 ms 33496 KB Output is correct
4 Correct 162 ms 32000 KB Output is correct
5 Correct 140 ms 28840 KB Output is correct
6 Correct 193 ms 29416 KB Output is correct
7 Correct 178 ms 29352 KB Output is correct
8 Correct 178 ms 29448 KB Output is correct
9 Correct 116 ms 28416 KB Output is correct
10 Correct 91 ms 26156 KB Output is correct
11 Correct 109 ms 26108 KB Output is correct
12 Correct 143 ms 27872 KB Output is correct
13 Correct 123 ms 39300 KB Output is correct
14 Correct 132 ms 39520 KB Output is correct
15 Correct 123 ms 41044 KB Output is correct
16 Correct 93 ms 40052 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9720 KB Output is correct
2 Correct 184 ms 29516 KB Output is correct
3 Correct 175 ms 29568 KB Output is correct
4 Correct 140 ms 41064 KB Output is correct
5 Correct 134 ms 36336 KB Output is correct
6 Correct 179 ms 29612 KB Output is correct
7 Correct 150 ms 41072 KB Output is correct
8 Correct 136 ms 41128 KB Output is correct
9 Correct 88 ms 40144 KB Output is correct
10 Correct 112 ms 32556 KB Output is correct
11 Correct 129 ms 29432 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9724 KB Output is correct
2 Correct 191 ms 29932 KB Output is correct
3 Correct 211 ms 29504 KB Output is correct
4 Correct 199 ms 29548 KB Output is correct
5 Correct 200 ms 30084 KB Output is correct
6 Correct 171 ms 29960 KB Output is correct
7 Correct 117 ms 34144 KB Output is correct
8 Correct 95 ms 39816 KB Output is correct
9 Correct 103 ms 21372 KB Output is correct
10 Correct 142 ms 28208 KB Output is correct
11 Correct 141 ms 29448 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9716 KB Output is correct
2 Correct 6 ms 9716 KB Output is correct
3 Correct 6 ms 9716 KB Output is correct
4 Correct 7 ms 9860 KB Output is correct
5 Correct 7 ms 9912 KB Output is correct
6 Correct 7 ms 9812 KB Output is correct
7 Correct 7 ms 9812 KB Output is correct
8 Correct 7 ms 9812 KB Output is correct
9 Correct 7 ms 10036 KB Output is correct
10 Correct 8 ms 9912 KB Output is correct
11 Correct 7 ms 9860 KB Output is correct
12 Correct 7 ms 9904 KB Output is correct
13 Correct 7 ms 9940 KB Output is correct
14 Correct 7 ms 9812 KB Output is correct
15 Correct 5 ms 9724 KB Output is correct
16 Correct 6 ms 9732 KB Output is correct
17 Correct 153 ms 33496 KB Output is correct
18 Correct 162 ms 32000 KB Output is correct
19 Correct 140 ms 28840 KB Output is correct
20 Correct 193 ms 29416 KB Output is correct
21 Correct 178 ms 29352 KB Output is correct
22 Correct 178 ms 29448 KB Output is correct
23 Correct 116 ms 28416 KB Output is correct
24 Correct 91 ms 26156 KB Output is correct
25 Correct 109 ms 26108 KB Output is correct
26 Correct 143 ms 27872 KB Output is correct
27 Correct 123 ms 39300 KB Output is correct
28 Correct 132 ms 39520 KB Output is correct
29 Correct 123 ms 41044 KB Output is correct
30 Correct 93 ms 40052 KB Output is correct
31 Correct 5 ms 9720 KB Output is correct
32 Correct 184 ms 29516 KB Output is correct
33 Correct 175 ms 29568 KB Output is correct
34 Correct 140 ms 41064 KB Output is correct
35 Correct 134 ms 36336 KB Output is correct
36 Correct 179 ms 29612 KB Output is correct
37 Correct 150 ms 41072 KB Output is correct
38 Correct 136 ms 41128 KB Output is correct
39 Correct 88 ms 40144 KB Output is correct
40 Correct 112 ms 32556 KB Output is correct
41 Correct 129 ms 29432 KB Output is correct
42 Correct 5 ms 9724 KB Output is correct
43 Correct 191 ms 29932 KB Output is correct
44 Correct 211 ms 29504 KB Output is correct
45 Correct 199 ms 29548 KB Output is correct
46 Correct 200 ms 30084 KB Output is correct
47 Correct 171 ms 29960 KB Output is correct
48 Correct 117 ms 34144 KB Output is correct
49 Correct 95 ms 39816 KB Output is correct
50 Correct 103 ms 21372 KB Output is correct
51 Correct 142 ms 28208 KB Output is correct
52 Correct 141 ms 29448 KB Output is correct
53 Correct 5 ms 9684 KB Output is correct
54 Correct 5 ms 9716 KB Output is correct
55 Correct 5 ms 9720 KB Output is correct
56 Correct 5 ms 9856 KB Output is correct
57 Correct 7 ms 9812 KB Output is correct
58 Correct 5 ms 9812 KB Output is correct
59 Correct 6 ms 9900 KB Output is correct
60 Correct 6 ms 9884 KB Output is correct
61 Correct 5 ms 9940 KB Output is correct
62 Correct 6 ms 9812 KB Output is correct
63 Correct 7 ms 9812 KB Output is correct
64 Correct 6 ms 9812 KB Output is correct
65 Correct 6 ms 9940 KB Output is correct
66 Correct 7 ms 9884 KB Output is correct
67 Correct 133 ms 33500 KB Output is correct
68 Correct 141 ms 31928 KB Output is correct
69 Correct 167 ms 28736 KB Output is correct
70 Correct 153 ms 29416 KB Output is correct
71 Correct 157 ms 29352 KB Output is correct
72 Correct 165 ms 29456 KB Output is correct
73 Correct 130 ms 28404 KB Output is correct
74 Correct 89 ms 26048 KB Output is correct
75 Correct 102 ms 26116 KB Output is correct
76 Correct 162 ms 27892 KB Output is correct
77 Correct 140 ms 39524 KB Output is correct
78 Correct 154 ms 39492 KB Output is correct
79 Correct 133 ms 41040 KB Output is correct
80 Correct 87 ms 40052 KB Output is correct
81 Correct 182 ms 29548 KB Output is correct
82 Correct 189 ms 29668 KB Output is correct
83 Correct 165 ms 41104 KB Output is correct
84 Correct 127 ms 36344 KB Output is correct
85 Correct 183 ms 29584 KB Output is correct
86 Correct 169 ms 41124 KB Output is correct
87 Correct 157 ms 41116 KB Output is correct
88 Correct 149 ms 32652 KB Output is correct
89 Correct 146 ms 29440 KB Output is correct
90 Correct 221 ms 29932 KB Output is correct
91 Correct 217 ms 29496 KB Output is correct
92 Correct 220 ms 29564 KB Output is correct
93 Correct 249 ms 29980 KB Output is correct
94 Correct 217 ms 29912 KB Output is correct
95 Correct 134 ms 34128 KB Output is correct
96 Correct 101 ms 39840 KB Output is correct
97 Correct 111 ms 21484 KB Output is correct
98 Correct 210 ms 28244 KB Output is correct
99 Correct 150 ms 29372 KB Output is correct
100 Correct 53 ms 14108 KB Output is correct
101 Correct 243 ms 29536 KB Output is correct
102 Correct 146 ms 26700 KB Output is correct
103 Correct 162 ms 29312 KB Output is correct
104 Correct 193 ms 30208 KB Output is correct