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Submission #578209

# Submission time Handle Problem Language Result Execution time Memory
578209 2022-06-16T08:23:48 Z IvanJ Stranded Far From Home (BOI22_island) C++17
100 / 100
 183 ms 25508 KB 
#include<bits/stdc++.h>

#define pb push_back
#define x first
#define y second
#define all(a) (a).begin(), (a).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> ii;

const int maxn = 2e5 + 5;

int n, m, P;
ll S[maxn];
int par[maxn];
ll M[maxn];
vector<int> W[maxn];
vector<pair<pair<ll, ll>, ii>> E;
int ans[maxn];

int find(int x) {return (par[x] == x) ? x : par[x] = find(par[x]);}

void merge(int x, int y) {
	x = find(x), y = find(y);
	if(x == y) return;
	if(W[x].size() < W[y].size()) 
		swap(x, y);
	
	if(S[x] < M[y]) W[x].clear();
	if(S[y] < M[x]) W[y].clear();
	for(int i : W[y]) 
		W[x].pb(i);
	
	par[y] = x;
	M[x] = max(M[x], M[y]);
	S[x] += S[y];
	P = x;
}

int main() {
	scanf("%d%d", &n, &m);
	for(int i = 0;i < n;i++)
		scanf("%lld", S + i);
	for(int i = 0;i < m;i++) {
		int x, y;
		scanf("%d%d", &x, &y);
		x--, y--;
		if(S[x] < S[y]) swap(x, y);
		E.pb({{S[x], S[y]}, {x, y}});
	}
	sort(all(E));
	
	for(int i = 0;i < n;i++)
		par[i] = i, M[i] = S[i], W[i].pb(i);

	
	for(auto p : E)
		merge(p.y.x, p.y.y);
	
	for(int i : W[P]) ans[i] = 1;
	for(int i = 0;i < n;i++)
		printf("%d", ans[i]);
	printf("\n");
	return 0;
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~
island.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%lld", S + i);
      |   ~~~~~^~~~~~~~~~~~~~~
island.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |   scanf("%d%d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 5076 KB Output is correct
5 Correct 6 ms 5204 KB Output is correct
6 Correct 4 ms 5076 KB Output is correct
7 Correct 4 ms 5076 KB Output is correct
8 Correct 4 ms 5076 KB Output is correct
9 Correct 4 ms 5076 KB Output is correct
10 Correct 6 ms 5204 KB Output is correct
11 Correct 4 ms 5204 KB Output is correct
12 Correct 4 ms 5204 KB Output is correct
13 Correct 4 ms 5076 KB Output is correct
14 Correct 4 ms 5076 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 125 ms 22332 KB Output is correct
4 Correct 120 ms 21816 KB Output is correct
5 Correct 133 ms 23440 KB Output is correct
6 Correct 137 ms 24076 KB Output is correct
7 Correct 135 ms 24044 KB Output is correct
8 Correct 135 ms 22576 KB Output is correct
9 Correct 124 ms 25508 KB Output is correct
10 Correct 117 ms 19976 KB Output is correct
11 Correct 124 ms 22552 KB Output is correct
12 Correct 137 ms 21272 KB Output is correct
13 Correct 119 ms 21880 KB Output is correct
14 Correct 119 ms 21764 KB Output is correct
15 Correct 118 ms 22572 KB Output is correct
16 Correct 89 ms 22388 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 160 ms 24732 KB Output is correct
3 Correct 161 ms 24884 KB Output is correct
4 Correct 123 ms 22560 KB Output is correct
5 Correct 114 ms 21596 KB Output is correct
6 Correct 156 ms 24716 KB Output is correct
7 Correct 123 ms 22576 KB Output is correct
8 Correct 127 ms 22696 KB Output is correct
9 Correct 91 ms 22496 KB Output is correct
10 Correct 125 ms 21720 KB Output is correct
11 Correct 142 ms 22400 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 163 ms 22536 KB Output is correct
3 Correct 153 ms 23024 KB Output is correct
4 Correct 170 ms 23940 KB Output is correct
5 Correct 182 ms 25396 KB Output is correct
6 Correct 168 ms 23236 KB Output is correct
7 Correct 121 ms 22524 KB Output is correct
8 Correct 111 ms 21744 KB Output is correct
9 Correct 106 ms 15980 KB Output is correct
10 Correct 154 ms 25360 KB Output is correct
11 Correct 177 ms 22600 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 5076 KB Output is correct
5 Correct 6 ms 5204 KB Output is correct
6 Correct 4 ms 5076 KB Output is correct
7 Correct 4 ms 5076 KB Output is correct
8 Correct 4 ms 5076 KB Output is correct
9 Correct 4 ms 5076 KB Output is correct
10 Correct 6 ms 5204 KB Output is correct
11 Correct 4 ms 5204 KB Output is correct
12 Correct 4 ms 5204 KB Output is correct
13 Correct 4 ms 5076 KB Output is correct
14 Correct 4 ms 5076 KB Output is correct
15 Correct 4 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 125 ms 22332 KB Output is correct
18 Correct 120 ms 21816 KB Output is correct
19 Correct 133 ms 23440 KB Output is correct
20 Correct 137 ms 24076 KB Output is correct
21 Correct 135 ms 24044 KB Output is correct
22 Correct 135 ms 22576 KB Output is correct
23 Correct 124 ms 25508 KB Output is correct
24 Correct 117 ms 19976 KB Output is correct
25 Correct 124 ms 22552 KB Output is correct
26 Correct 137 ms 21272 KB Output is correct
27 Correct 119 ms 21880 KB Output is correct
28 Correct 119 ms 21764 KB Output is correct
29 Correct 118 ms 22572 KB Output is correct
30 Correct 89 ms 22388 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 160 ms 24732 KB Output is correct
33 Correct 161 ms 24884 KB Output is correct
34 Correct 123 ms 22560 KB Output is correct
35 Correct 114 ms 21596 KB Output is correct
36 Correct 156 ms 24716 KB Output is correct
37 Correct 123 ms 22576 KB Output is correct
38 Correct 127 ms 22696 KB Output is correct
39 Correct 91 ms 22496 KB Output is correct
40 Correct 125 ms 21720 KB Output is correct
41 Correct 142 ms 22400 KB Output is correct
42 Correct 3 ms 4948 KB Output is correct
43 Correct 163 ms 22536 KB Output is correct
44 Correct 153 ms 23024 KB Output is correct
45 Correct 170 ms 23940 KB Output is correct
46 Correct 182 ms 25396 KB Output is correct
47 Correct 168 ms 23236 KB Output is correct
48 Correct 121 ms 22524 KB Output is correct
49 Correct 111 ms 21744 KB Output is correct
50 Correct 106 ms 15980 KB Output is correct
51 Correct 154 ms 25360 KB Output is correct
52 Correct 177 ms 22600 KB Output is correct
53 Correct 3 ms 4948 KB Output is correct
54 Correct 3 ms 4948 KB Output is correct
55 Correct 3 ms 4948 KB Output is correct
56 Correct 4 ms 5076 KB Output is correct
57 Correct 4 ms 5076 KB Output is correct
58 Correct 4 ms 5076 KB Output is correct
59 Correct 4 ms 5076 KB Output is correct
60 Correct 4 ms 5076 KB Output is correct
61 Correct 5 ms 5064 KB Output is correct
62 Correct 4 ms 5204 KB Output is correct
63 Correct 4 ms 5204 KB Output is correct
64 Correct 4 ms 5204 KB Output is correct
65 Correct 4 ms 5076 KB Output is correct
66 Correct 4 ms 5076 KB Output is correct
67 Correct 129 ms 22360 KB Output is correct
68 Correct 128 ms 21836 KB Output is correct
69 Correct 133 ms 23468 KB Output is correct
70 Correct 140 ms 24060 KB Output is correct
71 Correct 143 ms 24092 KB Output is correct
72 Correct 153 ms 22660 KB Output is correct
73 Correct 159 ms 25492 KB Output is correct
74 Correct 127 ms 20040 KB Output is correct
75 Correct 120 ms 22552 KB Output is correct
76 Correct 141 ms 21288 KB Output is correct
77 Correct 123 ms 21804 KB Output is correct
78 Correct 114 ms 21800 KB Output is correct
79 Correct 119 ms 22820 KB Output is correct
80 Correct 89 ms 22440 KB Output is correct
81 Correct 156 ms 24808 KB Output is correct
82 Correct 155 ms 24924 KB Output is correct
83 Correct 124 ms 22604 KB Output is correct
84 Correct 113 ms 21624 KB Output is correct
85 Correct 164 ms 24792 KB Output is correct
86 Correct 117 ms 22568 KB Output is correct
87 Correct 123 ms 22760 KB Output is correct
88 Correct 121 ms 21668 KB Output is correct
89 Correct 150 ms 22476 KB Output is correct
90 Correct 156 ms 22612 KB Output is correct
91 Correct 170 ms 23144 KB Output is correct
92 Correct 155 ms 23940 KB Output is correct
93 Correct 183 ms 25384 KB Output is correct
94 Correct 157 ms 23208 KB Output is correct
95 Correct 126 ms 22568 KB Output is correct
96 Correct 110 ms 21676 KB Output is correct
97 Correct 105 ms 16028 KB Output is correct
98 Correct 163 ms 25324 KB Output is correct
99 Correct 158 ms 22452 KB Output is correct
100 Correct 66 ms 11332 KB Output is correct
101 Correct 153 ms 23284 KB Output is correct
102 Correct 133 ms 20464 KB Output is correct
103 Correct 136 ms 20072 KB Output is correct
104 Correct 160 ms 22064 KB Output is correct