oj.uz

Submission #577319

# Submission time Handle Problem Language Result Execution time Memory
577319 2022-06-14T13:57:52 Z jamielim Stranded Far From Home (BOI22_island) C++14
100 / 100
 339 ms 43172 KB 
#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define mp make_pair
#define pb emplace_back
#define ALL(x) x.begin(),x.end()
#define SZ(x) (int)x.size()
typedef long long ll;
typedef pair<int,int> ii;
typedef pair<ii,ii> i4;
const int MOD=1000000007;
const int INF=1012345678;
const ll LLINF=1012345678012345678LL;
const double PI=3.1415926536;
const double EPS=1e-14;

int n,m;
ll s[200005];
vector<int> ordered[200005];
vector<int> adj[200005];
bool imposs[200005];
bool exist[200005];
int par[200005];
ll sz[200005];
vector<int> sets[200005];

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

void merge(int x,int y){
	int ra=root(x),rb=root(y);
	if(ra==rb)return;
	if(SZ(sets[ra])<SZ(sets[rb])){
		swap(ra,rb);
		swap(x,y);
	}
	// rb is smaller
	for(int i:sets[rb])sets[ra].pb(i);
	sz[ra]+=sz[rb];
	par[rb]=ra;
}

void mark_imposs(int x){
	for(int i:sets[x]){
		imposs[i]=1;
	}
	sets[x].clear();
}

int main(){
	scanf("%d%d",&n,&m);
	vector<ll> disc;
	for(int i=1;i<=n;i++){
		scanf("%lld",&s[i]);
		disc.pb(s[i]);
	}
	sort(ALL(disc));
	disc.resize(unique(ALL(disc))-disc.begin());
	for(int i=1;i<=n;i++){
		int x=lower_bound(ALL(disc),s[i])-disc.begin();
		ordered[x].pb(i);
	}
	int a,b;
	for(int i=0;i<m;i++){
		scanf("%d%d",&a,&b);
		adj[a].pb(b);
		adj[b].pb(a);
	}
	for(int i=1;i<=n;i++){
		par[i]=i;
		sz[i]=s[i];
		sets[i].pb(i);
	}
	for(int i=0;i<SZ(disc);i++){
		for(int j:ordered[i]){
			exist[j]=1;
		}
		for(int j:ordered[i]){
			for(int k:adj[j]){
				int p=root(k),q=root(j);
				if(p==q)continue;
				if(exist[p]){
					if(sz[p]<disc[i]&&!imposs[p]){
						mark_imposs(p);
					}
					merge(q,p);
				}
			}
		}
	}
	for(int i=1;i<=n;i++){
		if(imposs[i])printf("0");
		else printf("1");
	}
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:54:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |  scanf("%d%d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~
island.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |   scanf("%lld",&s[i]);
      |   ~~~~~^~~~~~~~~~~~~~
island.cpp:68:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |   scanf("%d%d",&a,&b);
      |   ~~~~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 8 ms 14628 KB Output is correct
5 Correct 9 ms 14548 KB Output is correct
6 Correct 9 ms 14548 KB Output is correct
7 Correct 11 ms 14620 KB Output is correct
8 Correct 11 ms 14524 KB Output is correct
9 Correct 8 ms 14548 KB Output is correct
10 Correct 9 ms 14692 KB Output is correct
11 Correct 8 ms 14676 KB Output is correct
12 Correct 8 ms 14676 KB Output is correct
13 Correct 8 ms 14564 KB Output is correct
14 Correct 9 ms 14548 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14292 KB Output is correct
2 Correct 8 ms 14384 KB Output is correct
3 Correct 200 ms 40724 KB Output is correct
4 Correct 167 ms 35500 KB Output is correct
5 Correct 197 ms 41624 KB Output is correct
6 Correct 234 ms 41272 KB Output is correct
7 Correct 229 ms 42596 KB Output is correct
8 Correct 194 ms 35360 KB Output is correct
9 Correct 195 ms 42284 KB Output is correct
10 Correct 189 ms 38712 KB Output is correct
11 Correct 155 ms 36152 KB Output is correct
12 Correct 218 ms 35076 KB Output is correct
13 Correct 166 ms 35512 KB Output is correct
14 Correct 169 ms 35468 KB Output is correct
15 Correct 176 ms 40808 KB Output is correct
16 Correct 119 ms 40520 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 304 ms 43132 KB Output is correct
3 Correct 296 ms 41984 KB Output is correct
4 Correct 177 ms 35348 KB Output is correct
5 Correct 200 ms 35300 KB Output is correct
6 Correct 304 ms 43172 KB Output is correct
7 Correct 201 ms 40844 KB Output is correct
8 Correct 195 ms 40820 KB Output is correct
9 Correct 120 ms 40600 KB Output is correct
10 Correct 177 ms 37356 KB Output is correct
11 Correct 209 ms 35676 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 233 ms 35680 KB Output is correct
3 Correct 228 ms 36144 KB Output is correct
4 Correct 237 ms 37264 KB Output is correct
5 Correct 239 ms 37956 KB Output is correct
6 Correct 198 ms 35584 KB Output is correct
7 Correct 153 ms 36088 KB Output is correct
8 Correct 143 ms 34904 KB Output is correct
9 Correct 118 ms 25772 KB Output is correct
10 Correct 215 ms 39588 KB Output is correct
11 Correct 188 ms 35452 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 7 ms 14420 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 8 ms 14628 KB Output is correct
5 Correct 9 ms 14548 KB Output is correct
6 Correct 9 ms 14548 KB Output is correct
7 Correct 11 ms 14620 KB Output is correct
8 Correct 11 ms 14524 KB Output is correct
9 Correct 8 ms 14548 KB Output is correct
10 Correct 9 ms 14692 KB Output is correct
11 Correct 8 ms 14676 KB Output is correct
12 Correct 8 ms 14676 KB Output is correct
13 Correct 8 ms 14564 KB Output is correct
14 Correct 9 ms 14548 KB Output is correct
15 Correct 8 ms 14292 KB Output is correct
16 Correct 8 ms 14384 KB Output is correct
17 Correct 200 ms 40724 KB Output is correct
18 Correct 167 ms 35500 KB Output is correct
19 Correct 197 ms 41624 KB Output is correct
20 Correct 234 ms 41272 KB Output is correct
21 Correct 229 ms 42596 KB Output is correct
22 Correct 194 ms 35360 KB Output is correct
23 Correct 195 ms 42284 KB Output is correct
24 Correct 189 ms 38712 KB Output is correct
25 Correct 155 ms 36152 KB Output is correct
26 Correct 218 ms 35076 KB Output is correct
27 Correct 166 ms 35512 KB Output is correct
28 Correct 169 ms 35468 KB Output is correct
29 Correct 176 ms 40808 KB Output is correct
30 Correct 119 ms 40520 KB Output is correct
31 Correct 7 ms 14292 KB Output is correct
32 Correct 304 ms 43132 KB Output is correct
33 Correct 296 ms 41984 KB Output is correct
34 Correct 177 ms 35348 KB Output is correct
35 Correct 200 ms 35300 KB Output is correct
36 Correct 304 ms 43172 KB Output is correct
37 Correct 201 ms 40844 KB Output is correct
38 Correct 195 ms 40820 KB Output is correct
39 Correct 120 ms 40600 KB Output is correct
40 Correct 177 ms 37356 KB Output is correct
41 Correct 209 ms 35676 KB Output is correct
42 Correct 7 ms 14292 KB Output is correct
43 Correct 233 ms 35680 KB Output is correct
44 Correct 228 ms 36144 KB Output is correct
45 Correct 237 ms 37264 KB Output is correct
46 Correct 239 ms 37956 KB Output is correct
47 Correct 198 ms 35584 KB Output is correct
48 Correct 153 ms 36088 KB Output is correct
49 Correct 143 ms 34904 KB Output is correct
50 Correct 118 ms 25772 KB Output is correct
51 Correct 215 ms 39588 KB Output is correct
52 Correct 188 ms 35452 KB Output is correct
53 Correct 8 ms 14420 KB Output is correct
54 Correct 9 ms 14420 KB Output is correct
55 Correct 7 ms 14292 KB Output is correct
56 Correct 8 ms 14548 KB Output is correct
57 Correct 9 ms 14672 KB Output is correct
58 Correct 8 ms 14548 KB Output is correct
59 Correct 8 ms 14604 KB Output is correct
60 Correct 8 ms 14548 KB Output is correct
61 Correct 8 ms 14616 KB Output is correct
62 Correct 9 ms 14676 KB Output is correct
63 Correct 9 ms 14676 KB Output is correct
64 Correct 9 ms 14656 KB Output is correct
65 Correct 10 ms 14548 KB Output is correct
66 Correct 9 ms 14548 KB Output is correct
67 Correct 177 ms 40760 KB Output is correct
68 Correct 159 ms 35388 KB Output is correct
69 Correct 206 ms 41656 KB Output is correct
70 Correct 220 ms 41208 KB Output is correct
71 Correct 211 ms 42640 KB Output is correct
72 Correct 186 ms 35344 KB Output is correct
73 Correct 183 ms 42324 KB Output is correct
74 Correct 233 ms 38716 KB Output is correct
75 Correct 150 ms 36092 KB Output is correct
76 Correct 188 ms 34960 KB Output is correct
77 Correct 159 ms 35524 KB Output is correct
78 Correct 159 ms 35448 KB Output is correct
79 Correct 186 ms 40768 KB Output is correct
80 Correct 119 ms 40536 KB Output is correct
81 Correct 304 ms 43104 KB Output is correct
82 Correct 291 ms 42044 KB Output is correct
83 Correct 212 ms 35336 KB Output is correct
84 Correct 158 ms 35204 KB Output is correct
85 Correct 335 ms 43128 KB Output is correct
86 Correct 195 ms 40804 KB Output is correct
87 Correct 186 ms 40792 KB Output is correct
88 Correct 195 ms 37372 KB Output is correct
89 Correct 189 ms 35624 KB Output is correct
90 Correct 241 ms 35692 KB Output is correct
91 Correct 258 ms 36168 KB Output is correct
92 Correct 231 ms 37196 KB Output is correct
93 Correct 222 ms 37872 KB Output is correct
94 Correct 208 ms 35532 KB Output is correct
95 Correct 154 ms 36156 KB Output is correct
96 Correct 118 ms 34940 KB Output is correct
97 Correct 128 ms 25708 KB Output is correct
98 Correct 241 ms 39676 KB Output is correct
99 Correct 189 ms 35404 KB Output is correct
100 Correct 51 ms 16960 KB Output is correct
101 Correct 325 ms 40448 KB Output is correct
102 Correct 175 ms 31628 KB Output is correct
103 Correct 243 ms 35176 KB Output is correct
104 Correct 339 ms 40272 KB Output is correct