oj.uz

Submission #44658

# Submission time Handle Problem Language Result Execution time Memory
44658 2018-04-04T13:48:22 Z ffresh Port Facility (JOI17_port_facility) C++17
100 / 100
 2336 ms 671948 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
#define ll long long
 
const int N = 1e6+15,mod = 1e9+7;
 
 
int L[N],R[N];
 
int par[N],enemy[N];
 
int find(int a){
	if(a==-1)return -1;
	if(a==par[a])return a;
	return par[a]= find(par[a]);
}

set<int> dsuid[N];

set<pair<int,int> >minid;

int sz[N];

void push(int x,int y){

	minid.erase(make_pair(*dsuid[y].begin(),y));
	minid.erase(make_pair(*dsuid[x].begin(),x));
	while(dsuid[y].size()>0){
		dsuid[x].insert(*dsuid[y].begin());
		dsuid[y].erase(dsuid[y].begin());
	}
	minid.insert(make_pair(*dsuid[x].begin(),x) );
}
void make(int v,int a){
	if(v!=-1 && sz[v]>sz[a]){
		par[a]= v;
		sz[v]+=sz[a];
		push(v,a);
	}
	else if(v!=-1){
		par[v]= a;
		sz[a]+=sz[v];
		push(a,v);
	}
}
void make_enemy(int a,int b){

	a = find(a),b = find(b);
	int u = find(enemy[a]), v = find(enemy[b]);
	if(a==b || (u!=-1 && u==v)){
		printf("0\n");
		exit(0);
	}
	make(v,a);
	make(u,b);
	enemy[a]= b;
	enemy[b]= a;
}

int main(){

    //freopen("input.txt","r",stdin);
    int n;
    cin>>n;
    vector<pair<int,int> >v;
    for(int i=1;i<=n;++i){
    	scanf("%d%d",&L[i],&R[i]);
    	v.push_back(make_pair(L[i],i));
    }
    sort(v.begin(),v.end());
    for(int i=1;i<=n;++i){
    	par[i]= i,enemy[i]= -1,sz[i]= 1;
    	dsuid[i].insert(R[i]);
    }
 
   	set<pair<int,int> >s;
   	set<pair<int,int> >::iterator it,jt;
   	
   	set<int>::iterator nx;

   	int u;
	for(int i=0;i<v.size();++i){

		int l = v[i].first, id = v[i].second;

		while(minid.size()>0){
			it = minid.begin();

			if((*it).first>l)break;


			u = (*it).second;
			minid.erase(it);
			
			while(dsuid[u].size()>0){
				if( *dsuid[u].begin()>l)break;
				else
					dsuid[u].erase(dsuid[u].begin());
			}
			if(dsuid[u].size()>0)
				minid.insert(make_pair(*dsuid[u].begin(),u));
		}

		minid.insert(make_pair(R[id],id));

		vector<int> Q;
		for(it = minid.begin();it!= minid.end();++it){
			
			if( (*it).first>=R[id])break;
			Q.push_back((*it).second);
		}

		while(!Q.empty()){
			make_enemy(Q.back(),id);
			Q.pop_back();
		}
	}
	long long ret= 1;
	for(int i=1;i<=n;++i){
		if(find(i)==i&& find(enemy[i])<i){
			ret= (ret*2)%mod;
		}
	}
	cout<<ret<<endl;
 
    return 0;
}

Compilation message

port_facility.cpp: In function 'int main()':
port_facility.cpp:84:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v.size();++i){
              ~^~~~~~~~~
port_facility.cpp:69:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
      scanf("%d%d",&L[i],&R[i]);
      ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 47224 KB Output is correct
2 Correct 39 ms 47332 KB Output is correct
3 Correct 42 ms 47540 KB Output is correct
4 Correct 39 ms 47540 KB Output is correct
5 Correct 44 ms 47540 KB Output is correct
6 Correct 42 ms 47672 KB Output is correct
7 Correct 39 ms 47676 KB Output is correct
8 Correct 37 ms 47676 KB Output is correct
9 Correct 44 ms 47676 KB Output is correct
10 Correct 39 ms 47676 KB Output is correct
11 Correct 40 ms 47676 KB Output is correct
12 Correct 38 ms 47676 KB Output is correct
13 Correct 40 ms 47676 KB Output is correct
14 Correct 39 ms 47676 KB Output is correct
15 Correct 40 ms 47676 KB Output is correct
16 Correct 38 ms 47676 KB Output is correct
17 Correct 38 ms 47676 KB Output is correct
18 Correct 38 ms 47676 KB Output is correct
19 Correct 38 ms 47680 KB Output is correct
20 Correct 39 ms 47684 KB Output is correct
21 Correct 38 ms 47688 KB Output is correct
22 Correct 43 ms 47692 KB Output is correct
23 Correct 39 ms 47696 KB Output is correct
24 Correct 37 ms 47700 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 47224 KB Output is correct
2 Correct 39 ms 47332 KB Output is correct
3 Correct 42 ms 47540 KB Output is correct
4 Correct 39 ms 47540 KB Output is correct
5 Correct 44 ms 47540 KB Output is correct
6 Correct 42 ms 47672 KB Output is correct
7 Correct 39 ms 47676 KB Output is correct
8 Correct 37 ms 47676 KB Output is correct
9 Correct 44 ms 47676 KB Output is correct
10 Correct 39 ms 47676 KB Output is correct
11 Correct 40 ms 47676 KB Output is correct
12 Correct 38 ms 47676 KB Output is correct
13 Correct 40 ms 47676 KB Output is correct
14 Correct 39 ms 47676 KB Output is correct
15 Correct 40 ms 47676 KB Output is correct
16 Correct 38 ms 47676 KB Output is correct
17 Correct 38 ms 47676 KB Output is correct
18 Correct 38 ms 47676 KB Output is correct
19 Correct 38 ms 47680 KB Output is correct
20 Correct 39 ms 47684 KB Output is correct
21 Correct 38 ms 47688 KB Output is correct
22 Correct 43 ms 47692 KB Output is correct
23 Correct 39 ms 47696 KB Output is correct
24 Correct 37 ms 47700 KB Output is correct
25 Correct 40 ms 47836 KB Output is correct
26 Correct 40 ms 47856 KB Output is correct
27 Correct 43 ms 47876 KB Output is correct
28 Correct 40 ms 47896 KB Output is correct
29 Correct 44 ms 47968 KB Output is correct
30 Correct 41 ms 47968 KB Output is correct
31 Correct 41 ms 47968 KB Output is correct
32 Correct 42 ms 47976 KB Output is correct
33 Correct 41 ms 47996 KB Output is correct
34 Correct 41 ms 47996 KB Output is correct
35 Correct 40 ms 47996 KB Output is correct
36 Correct 40 ms 48124 KB Output is correct
37 Correct 39 ms 48124 KB Output is correct
38 Correct 39 ms 48124 KB Output is correct
39 Correct 40 ms 48124 KB Output is correct
40 Correct 40 ms 48140 KB Output is correct
41 Correct 40 ms 48156 KB Output is correct
42 Correct 41 ms 48176 KB Output is correct
43 Correct 40 ms 48196 KB Output is correct
44 Correct 40 ms 48236 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 47224 KB Output is correct
2 Correct 39 ms 47332 KB Output is correct
3 Correct 42 ms 47540 KB Output is correct
4 Correct 39 ms 47540 KB Output is correct
5 Correct 44 ms 47540 KB Output is correct
6 Correct 42 ms 47672 KB Output is correct
7 Correct 39 ms 47676 KB Output is correct
8 Correct 37 ms 47676 KB Output is correct
9 Correct 44 ms 47676 KB Output is correct
10 Correct 39 ms 47676 KB Output is correct
11 Correct 40 ms 47676 KB Output is correct
12 Correct 38 ms 47676 KB Output is correct
13 Correct 40 ms 47676 KB Output is correct
14 Correct 39 ms 47676 KB Output is correct
15 Correct 40 ms 47676 KB Output is correct
16 Correct 38 ms 47676 KB Output is correct
17 Correct 38 ms 47676 KB Output is correct
18 Correct 38 ms 47676 KB Output is correct
19 Correct 38 ms 47680 KB Output is correct
20 Correct 39 ms 47684 KB Output is correct
21 Correct 38 ms 47688 KB Output is correct
22 Correct 43 ms 47692 KB Output is correct
23 Correct 39 ms 47696 KB Output is correct
24 Correct 37 ms 47700 KB Output is correct
25 Correct 40 ms 47836 KB Output is correct
26 Correct 40 ms 47856 KB Output is correct
27 Correct 43 ms 47876 KB Output is correct
28 Correct 40 ms 47896 KB Output is correct
29 Correct 44 ms 47968 KB Output is correct
30 Correct 41 ms 47968 KB Output is correct
31 Correct 41 ms 47968 KB Output is correct
32 Correct 42 ms 47976 KB Output is correct
33 Correct 41 ms 47996 KB Output is correct
34 Correct 41 ms 47996 KB Output is correct
35 Correct 40 ms 47996 KB Output is correct
36 Correct 40 ms 48124 KB Output is correct
37 Correct 39 ms 48124 KB Output is correct
38 Correct 39 ms 48124 KB Output is correct
39 Correct 40 ms 48124 KB Output is correct
40 Correct 40 ms 48140 KB Output is correct
41 Correct 40 ms 48156 KB Output is correct
42 Correct 41 ms 48176 KB Output is correct
43 Correct 40 ms 48196 KB Output is correct
44 Correct 40 ms 48236 KB Output is correct
45 Correct 173 ms 56848 KB Output is correct
46 Correct 177 ms 58152 KB Output is correct
47 Correct 184 ms 59468 KB Output is correct
48 Correct 169 ms 60860 KB Output is correct
49 Correct 179 ms 62016 KB Output is correct
50 Correct 106 ms 63272 KB Output is correct
51 Correct 128 ms 64536 KB Output is correct
52 Correct 174 ms 65760 KB Output is correct
53 Correct 116 ms 71776 KB Output is correct
54 Correct 86 ms 71776 KB Output is correct
55 Correct 96 ms 71776 KB Output is correct
56 Correct 84 ms 71776 KB Output is correct
57 Correct 125 ms 72096 KB Output is correct
58 Correct 122 ms 73484 KB Output is correct
59 Correct 134 ms 74728 KB Output is correct
60 Correct 164 ms 76056 KB Output is correct
61 Correct 182 ms 77068 KB Output is correct
62 Correct 86 ms 78412 KB Output is correct
63 Correct 86 ms 79672 KB Output is correct
64 Correct 87 ms 80936 KB Output is correct
65 Correct 88 ms 82196 KB Output is correct
66 Correct 91 ms 83452 KB Output is correct
67 Correct 220 ms 87532 KB Output is correct
68 Correct 190 ms 88792 KB Output is correct
69 Correct 189 ms 89212 KB Output is correct
70 Correct 188 ms 90596 KB Output is correct
71 Correct 187 ms 92604 KB Output is correct
72 Correct 183 ms 93860 KB Output is correct
73 Correct 175 ms 94212 KB Output is correct
74 Correct 186 ms 95612 KB Output is correct
75 Correct 153 ms 95612 KB Output is correct
76 Correct 165 ms 96144 KB Output is correct
77 Correct 177 ms 97488 KB Output is correct
78 Correct 179 ms 98624 KB Output is correct
79 Correct 191 ms 99900 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 47224 KB Output is correct
2 Correct 39 ms 47332 KB Output is correct
3 Correct 42 ms 47540 KB Output is correct
4 Correct 39 ms 47540 KB Output is correct
5 Correct 44 ms 47540 KB Output is correct
6 Correct 42 ms 47672 KB Output is correct
7 Correct 39 ms 47676 KB Output is correct
8 Correct 37 ms 47676 KB Output is correct
9 Correct 44 ms 47676 KB Output is correct
10 Correct 39 ms 47676 KB Output is correct
11 Correct 40 ms 47676 KB Output is correct
12 Correct 38 ms 47676 KB Output is correct
13 Correct 40 ms 47676 KB Output is correct
14 Correct 39 ms 47676 KB Output is correct
15 Correct 40 ms 47676 KB Output is correct
16 Correct 38 ms 47676 KB Output is correct
17 Correct 38 ms 47676 KB Output is correct
18 Correct 38 ms 47676 KB Output is correct
19 Correct 38 ms 47680 KB Output is correct
20 Correct 39 ms 47684 KB Output is correct
21 Correct 38 ms 47688 KB Output is correct
22 Correct 43 ms 47692 KB Output is correct
23 Correct 39 ms 47696 KB Output is correct
24 Correct 37 ms 47700 KB Output is correct
25 Correct 40 ms 47836 KB Output is correct
26 Correct 40 ms 47856 KB Output is correct
27 Correct 43 ms 47876 KB Output is correct
28 Correct 40 ms 47896 KB Output is correct
29 Correct 44 ms 47968 KB Output is correct
30 Correct 41 ms 47968 KB Output is correct
31 Correct 41 ms 47968 KB Output is correct
32 Correct 42 ms 47976 KB Output is correct
33 Correct 41 ms 47996 KB Output is correct
34 Correct 41 ms 47996 KB Output is correct
35 Correct 40 ms 47996 KB Output is correct
36 Correct 40 ms 48124 KB Output is correct
37 Correct 39 ms 48124 KB Output is correct
38 Correct 39 ms 48124 KB Output is correct
39 Correct 40 ms 48124 KB Output is correct
40 Correct 40 ms 48140 KB Output is correct
41 Correct 40 ms 48156 KB Output is correct
42 Correct 41 ms 48176 KB Output is correct
43 Correct 40 ms 48196 KB Output is correct
44 Correct 40 ms 48236 KB Output is correct
45 Correct 173 ms 56848 KB Output is correct
46 Correct 177 ms 58152 KB Output is correct
47 Correct 184 ms 59468 KB Output is correct
48 Correct 169 ms 60860 KB Output is correct
49 Correct 179 ms 62016 KB Output is correct
50 Correct 106 ms 63272 KB Output is correct
51 Correct 128 ms 64536 KB Output is correct
52 Correct 174 ms 65760 KB Output is correct
53 Correct 116 ms 71776 KB Output is correct
54 Correct 86 ms 71776 KB Output is correct
55 Correct 96 ms 71776 KB Output is correct
56 Correct 84 ms 71776 KB Output is correct
57 Correct 125 ms 72096 KB Output is correct
58 Correct 122 ms 73484 KB Output is correct
59 Correct 134 ms 74728 KB Output is correct
60 Correct 164 ms 76056 KB Output is correct
61 Correct 182 ms 77068 KB Output is correct
62 Correct 86 ms 78412 KB Output is correct
63 Correct 86 ms 79672 KB Output is correct
64 Correct 87 ms 80936 KB Output is correct
65 Correct 88 ms 82196 KB Output is correct
66 Correct 91 ms 83452 KB Output is correct
67 Correct 220 ms 87532 KB Output is correct
68 Correct 190 ms 88792 KB Output is correct
69 Correct 189 ms 89212 KB Output is correct
70 Correct 188 ms 90596 KB Output is correct
71 Correct 187 ms 92604 KB Output is correct
72 Correct 183 ms 93860 KB Output is correct
73 Correct 175 ms 94212 KB Output is correct
74 Correct 186 ms 95612 KB Output is correct
75 Correct 153 ms 95612 KB Output is correct
76 Correct 165 ms 96144 KB Output is correct
77 Correct 177 ms 97488 KB Output is correct
78 Correct 179 ms 98624 KB Output is correct
79 Correct 191 ms 99900 KB Output is correct
80 Correct 1895 ms 181448 KB Output is correct
81 Correct 2031 ms 196072 KB Output is correct
82 Correct 1977 ms 210648 KB Output is correct
83 Correct 1918 ms 225028 KB Output is correct
84 Correct 1903 ms 239824 KB Output is correct
85 Correct 1052 ms 254252 KB Output is correct
86 Correct 1200 ms 268940 KB Output is correct
87 Correct 1289 ms 283400 KB Output is correct
88 Correct 1082 ms 345032 KB Output is correct
89 Correct 552 ms 345032 KB Output is correct
90 Correct 526 ms 345032 KB Output is correct
91 Correct 545 ms 345032 KB Output is correct
92 Correct 1462 ms 356440 KB Output is correct
93 Correct 1300 ms 371112 KB Output is correct
94 Correct 1509 ms 385472 KB Output is correct
95 Correct 1943 ms 400040 KB Output is correct
96 Correct 2307 ms 414644 KB Output is correct
97 Correct 819 ms 429352 KB Output is correct
98 Correct 1056 ms 443692 KB Output is correct
99 Correct 922 ms 458520 KB Output is correct
100 Correct 596 ms 472740 KB Output is correct
101 Correct 604 ms 487376 KB Output is correct
102 Correct 2141 ms 528780 KB Output is correct
103 Correct 2336 ms 543472 KB Output is correct
104 Correct 2170 ms 549520 KB Output is correct
105 Correct 2065 ms 564088 KB Output is correct
106 Correct 2112 ms 587140 KB Output is correct
107 Correct 2117 ms 601568 KB Output is correct
108 Correct 2041 ms 607788 KB Output is correct
109 Correct 1949 ms 622344 KB Output is correct
110 Correct 1829 ms 622344 KB Output is correct
111 Correct 1873 ms 632420 KB Output is correct
112 Correct 1872 ms 646028 KB Output is correct
113 Correct 2119 ms 658960 KB Output is correct
114 Correct 2091 ms 671948 KB Output is correct