oj.uz

Submission #213134

# Submission time Handle Problem Language Result Execution time Memory
213134 2020-03-25T04:11:02 Z username Making Friends on Joitter is Fun (JOI20_joitter2) C++14
100 / 100
 871 ms 61048 KB 
#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector")
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#include<ext/rope>
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define tr(it,a) for(auto it:a)
#define pob pop_back
#define pf push_front
#define pof pop_front
#define umin(x,y) (x=min(x,(y)))
#define umax(x,y) (x=max(x,(y)))
#define mid ((l+r)/2)
#define lch (idx*2+1)
#define rch (idx*2+2)
//
#include<bits/stdc++.h>
#define int int_fast64_t
using namespace std;
typedef pair<int,int> pii;
#define REP(i,j,k) for(int i=(j);i<(k);++i)
#define RREP(i,j,k) for(int i=int(j)-1;i>=(k);--i)
#define ALL(a) a.begin(),a.end()
#define pb push_back
#define f first
#define s second
#define endl '\n'
// #define __db
#ifdef __db
	#define IOS
	#define prt(...) cerr<<__VA_ARGS__
	#define ary(s,t)\
		for(auto it=(s);it!=(t);++it)prt(*it<<" ");\
		prt(endl);
#else
	#define IOS cin.tie(0),cout.tie(0),ios_base::sync_with_stdio(false)
	#define prt(...)
	#define ary(...)
#endif
//
const int maxn=1e5+9,maxm=3e5+9;
int n,m,res=0,fa[maxn],sz[maxn];
set<pii>*ex[maxn],*re[maxn];

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

void merge(int pa,int pb){
	pa=find(pa),pb=find(pb);
	if(pa==pb)return;
	res-=sz[pa]*re[pa]->size();
	res-=sz[pb]*re[pb]->size();
	while(1){
		auto it=ex[pa]->lower_bound({pb,0});
		if(it!=ex[pa]->end()&&it->f==pb)ex[pa]->erase(it);
		else break;
	}
	while(1){
		auto it=re[pa]->lower_bound({pb,0});
		if(it!=re[pa]->end()&&it->f==pb)re[pa]->erase(it);
		else break;
	}
	while(1){
		auto it=ex[pb]->lower_bound({pa,0});
		if(it!=ex[pb]->end()&&it->f==pa)ex[pb]->erase(it);
		else break;
	}
	while(1){
		auto it=re[pb]->lower_bound({pa,0});
		if(it!=re[pb]->end()&&it->f==pa)re[pb]->erase(it);
		else break;
	}
	if(ex[pa]->size()+re[pa]->size()>ex[pb]->size()+re[pb]->size())swap(pa,pb);
	tr(x,*ex[pa]){
		re[x.f]->erase({pa,x.s});
		re[x.f]->insert({pb,x.s});
	}
	tr(x,*re[pa]){
		ex[x.f]->erase({pa,x.s});
		ex[x.f]->insert({pb,x.s});
	}
	vector<int>nx;
	tr(x,*ex[pa]){
		auto it=re[pb]->lower_bound({x.f,0});
		if(it!=re[pb]->end()&&it->f==x.f)nx.pb(x.f);
		ex[pb]->insert(x);
	}
	tr(x,*re[pa]){
		auto it=ex[pb]->lower_bound({x.f,0});
		if(it!=ex[pb]->end()&&it->f==x.f)nx.pb(x.f);
		re[pb]->insert(x);
	}
	res+=2*sz[pa]*sz[pb];
	res+=(sz[pa]+sz[pb])*re[pb]->size();
	fa[pa]=pb,sz[pb]+=sz[pa];
	REP(i,0,nx.size())merge(pb,nx[i]);
}

main(){
	IOS;
	cin>>n>>m;
	REP(i,0,n)fa[i]=i,sz[i]=1,ex[i]=new set<pii>,re[i]=new set<pii>;
	while(m--){
		int a,b,pa,pb;cin>>a>>b,--a,--b,pa=find(a),pb=find(b);
		if(pa==pb||ex[pa]->count({pb,a})){
			cout<<res<<endl;
			continue;
		}
		ex[pa]->insert({pb,a});
		re[pb]->insert({pa,a});
		res+=sz[pb];
		auto it=ex[pb]->lower_bound({pa,0});
		if(it!=ex[pb]->end()&&it->f==pa){
			merge(pa,pb);
		}
//		REP(i,0,n){
//			cout<<i+1<<"->"<<find(i)+1<<endl;
//		}
//		REP(i,0,n){
//			if(i==find(i)){
//				cout<<i+1<<":";
//				tr(it,*ex[i])cout<<it.f+1<<","<<it.s+1<<" ";cout<<endl;
//				tr(it,*re[i])cout<<it.f+1<<","<<it.s+1<<" ";cout<<endl;
//			}
//		}
//		cout<<endl;
		cout<<res<<endl;
	}
}

Compilation message

joitter2.cpp: In function 'void merge(int_fast64_t, int_fast64_t)':
joitter2.cpp:21:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define REP(i,j,k) for(int i=(j);i<(k);++i)
                                   ^
joitter2.cpp:97:2: note: in expansion of macro 'REP'
  REP(i,0,nx.size())merge(pb,nx[i]);
  ^~~
joitter2.cpp: At global scope:
joitter2.cpp:100:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 4 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 4 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 7 ms 512 KB Output is correct
35 Correct 87 ms 6392 KB Output is correct
36 Correct 118 ms 9372 KB Output is correct
37 Correct 115 ms 9336 KB Output is correct
38 Correct 114 ms 9008 KB Output is correct
39 Correct 6 ms 768 KB Output is correct
40 Correct 7 ms 896 KB Output is correct
41 Correct 7 ms 896 KB Output is correct
42 Correct 6 ms 768 KB Output is correct
43 Correct 9 ms 896 KB Output is correct
44 Correct 8 ms 896 KB Output is correct
45 Correct 8 ms 768 KB Output is correct
46 Correct 6 ms 800 KB Output is correct
47 Correct 8 ms 896 KB Output is correct
48 Correct 7 ms 896 KB Output is correct
49 Correct 15 ms 1792 KB Output is correct
50 Correct 124 ms 9424 KB Output is correct
51 Correct 12 ms 1152 KB Output is correct
52 Correct 99 ms 7940 KB Output is correct
53 Correct 14 ms 1664 KB Output is correct
54 Correct 111 ms 8568 KB Output is correct
55 Correct 9 ms 1280 KB Output is correct
56 Correct 9 ms 1280 KB Output is correct
57 Correct 9 ms 1664 KB Output is correct
58 Correct 10 ms 1664 KB Output is correct
59 Correct 7 ms 768 KB Output is correct
60 Correct 87 ms 5752 KB Output is correct
61 Correct 8 ms 1024 KB Output is correct
62 Correct 111 ms 8824 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 4 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 7 ms 512 KB Output is correct
35 Correct 87 ms 6392 KB Output is correct
36 Correct 118 ms 9372 KB Output is correct
37 Correct 115 ms 9336 KB Output is correct
38 Correct 114 ms 9008 KB Output is correct
39 Correct 6 ms 768 KB Output is correct
40 Correct 7 ms 896 KB Output is correct
41 Correct 7 ms 896 KB Output is correct
42 Correct 6 ms 768 KB Output is correct
43 Correct 9 ms 896 KB Output is correct
44 Correct 8 ms 896 KB Output is correct
45 Correct 8 ms 768 KB Output is correct
46 Correct 6 ms 800 KB Output is correct
47 Correct 8 ms 896 KB Output is correct
48 Correct 7 ms 896 KB Output is correct
49 Correct 15 ms 1792 KB Output is correct
50 Correct 124 ms 9424 KB Output is correct
51 Correct 12 ms 1152 KB Output is correct
52 Correct 99 ms 7940 KB Output is correct
53 Correct 14 ms 1664 KB Output is correct
54 Correct 111 ms 8568 KB Output is correct
55 Correct 9 ms 1280 KB Output is correct
56 Correct 9 ms 1280 KB Output is correct
57 Correct 9 ms 1664 KB Output is correct
58 Correct 10 ms 1664 KB Output is correct
59 Correct 7 ms 768 KB Output is correct
60 Correct 87 ms 5752 KB Output is correct
61 Correct 8 ms 1024 KB Output is correct
62 Correct 111 ms 8824 KB Output is correct
63 Correct 420 ms 59256 KB Output is correct
64 Correct 425 ms 59000 KB Output is correct
65 Correct 426 ms 59000 KB Output is correct
66 Correct 132 ms 20472 KB Output is correct
67 Correct 259 ms 26580 KB Output is correct
68 Correct 135 ms 20476 KB Output is correct
69 Correct 358 ms 26616 KB Output is correct
70 Correct 132 ms 20472 KB Output is correct
71 Correct 133 ms 20472 KB Output is correct
72 Correct 311 ms 26912 KB Output is correct
73 Correct 292 ms 26872 KB Output is correct
74 Correct 871 ms 52344 KB Output is correct
75 Correct 554 ms 33276 KB Output is correct
76 Correct 633 ms 42364 KB Output is correct
77 Correct 634 ms 42360 KB Output is correct
78 Correct 194 ms 27128 KB Output is correct
79 Correct 364 ms 30968 KB Output is correct
80 Correct 185 ms 27000 KB Output is correct
81 Correct 305 ms 30328 KB Output is correct
82 Correct 589 ms 45432 KB Output is correct
83 Correct 557 ms 45432 KB Output is correct
84 Correct 538 ms 60920 KB Output is correct
85 Correct 546 ms 61048 KB Output is correct
86 Correct 140 ms 19576 KB Output is correct
87 Correct 177 ms 21880 KB Output is correct
88 Correct 310 ms 27128 KB Output is correct
89 Correct 600 ms 39928 KB Output is correct