QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#710748 | #3556. Making Friends on Joitter is Fun | sitablechair | 0 | 35ms | 150472kb | C++23 | 2.8kb | 2024-11-04 21:22:19 | 2024-11-04 21:22:19 |
Judging History
answer
#include <bits/stdc++.h>
#define ll long long
#define ldb long double
#define endl '\n'
#define For(i,l,r) for(int i=l;i<=r;i++)
#define ForD(i,r,l) for(int i=r;i>=l;i--)
#define REP(i,l,r) For(i,l,r-1)
#define PER(i,r,l) ForD(i,r-1,l)
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
#define All(x,n) x+1,x+1+n
#define Alll(x,n) x,x+n
#define sz(x) (signed)x.size()
#define unq(x) x.resize(unique(all(x))-x.begin())
#define mpa make_pair
#ifdef NCGM
#include"debug.h"
#else
#define debug(...) "fr";
#endif
using namespace std;
const int N=1e6+3;
int n,m,f[N],f1[N],mmb[N];
ll ans=0;
map<int,int> mp[N],mp1[N];
set<int> st[N];
vector<int> ahu;
vector<pair<int,int>> ahu1;
int find_set(int u) {
return (f[u]<0?u:f[u]=find_set(f[u]));
}
int find_set1(int u) {
return (f1[u]<0?u:f1[u]=find_set1(f1[u]));
}
void unite(int u,int v) {
int a=find_set(u),b=find_set(v);
if (a==b) return;
int a1=find_set1(u),b1=find_set1(v);
ans+=1LL*f[a]*(sz(st[a1])-1);
ans+=1LL*f[b]*(sz(st[b1])-1);
if (sz(st[a1])<sz(st[b1])) swap(a1,b1);
if (sz(mp[a])+sz(mp1[a])<sz(mp[b])+sz(mp1[b])) swap(a,b);
ahu.clear();
for(auto el: mp[b]) {
ahu.pb(el.ff);
if (mp[find_set(el.ff)].count(a) || mp[find_set(el.ff)].count(b)) ahu1.pb({el.ff,a});
}
for(auto el: mp1[b])
if (mp1[el.ff].count(a) || mp1[el.ff].count(b)) ahu1.pb({el.ff,a});
for(auto el: mp1[b1]) {
mp[el.ff][a]=mp[el.ff][b];
mp[el.ff].erase(mp[el.ff].find(b));
}
for(auto el: ahu) {
mp1[el][a]=mp1[el][b];
mp1[el].erase(mp1[el].find(b));
}
for(auto el: st[b1]) st[a1].insert(el);
st[b1].clear();
for(auto el: mp[b]) mp[a][el.ff]+=el.ss;
mp[b].clear();
for(auto el: mp1[b]) mp1[a][el.ff]+=el.ss;
mp1[b].clear();
f[a]+=f[b];
f1[a1]+=f1[b1];
f[b]=a;
f1[b1]=a1;
ans-=1LL*f[a]*(sz(st[find_set1(a)])-1);
//for(auto el: ahu1) {
// if (find_set(el)==find_set(a)) continue;
// unite(el,a);
//}
}
void add_edge(int u,int v) {
if (find_set(u)==find_set(v) || st[find_set1(v)].find(u)!=st[find_set1(v)].end()) return;
mp[find_set(v)][find_set(u)]++;
mp1[find_set(u)][find_set(v)]++;
if (st[find_set1(v)].find(u)==st[find_set1(v)].end()) ans-=f[find_set(v)];
st[find_set1(v)].insert(u);
if (mp[find_set(u)].count(find_set(v))) unite(u,v);
while(sz(ahu1)) {
unite(ahu1.back().ff,ahu1.back().ss);
ahu1.pop_back();
}
}
int main() {
cin.tie(0)->sync_with_stdio(0);
cin >> n >> m;
For(i,1,n) f[i]=f1[i]=-1;
For(i,1,n) st[i].insert(i);
For(i,1,m) {
int u,v;
cin >> u >> v;
add_edge(u,v);
cout << ans << endl;
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Subtask #1:
score: 0
Wrong Answer
Test #1:
score: 1
Accepted
time: 15ms
memory: 148656kb
input:
5 20 4 2 1 5 2 3 2 5 3 2 3 1 4 5 1 2 5 2 1 4 4 1 3 4 5 1 2 4 2 1 4 3 1 3 5 4 3 5 5 3
output:
1 2 3 4 6 7 8 12 16 20 20 20 20 20 20 20 20 20 20 20
result:
ok 20 lines
Test #2:
score: 1
Accepted
time: 16ms
memory: 148512kb
input:
5 20 4 5 1 2 2 1 4 3 3 2 5 2 1 5 4 1 2 3 1 3 1 4 4 2 5 1 3 5 2 5 3 1 2 4 3 4 5 4 5 3
output:
1 2 3 4 6 8 13 13 16 16 20 20 20 20 20 20 20 20 20 20
result:
ok 20 lines
Test #3:
score: 1
Accepted
time: 35ms
memory: 150472kb
input:
5 20 3 1 5 1 3 4 5 2 1 2 5 4 3 5 2 4 1 3 2 5 4 5 4 3 4 2 2 3 3 2 5 3 2 1 1 5 4 1 1 4
output:
1 2 3 4 5 6 7 8 11 15 20 20 20 20 20 20 20 20 20 20
result:
ok 20 lines
Test #4:
score: 1
Accepted
time: 20ms
memory: 148720kb
input:
10 10 9 1 10 6 4 10 1 8 4 9 7 8 2 4 6 5 10 1 1 7
output:
1 2 3 4 5 6 7 8 9 10
result:
ok 10 lines
Test #5:
score: 0
Wrong Answer
time: 20ms
memory: 150108kb
input:
10 90 10 6 7 8 8 4 9 3 2 8 9 2 1 10 1 8 8 9 5 6 2 10 4 3 7 2 10 2 10 5 3 7 1 9 8 7 1 2 9 1 7 6 9 7 10 3 8 3 6 3 7 5 8 2 6 1 4 9 7 1 4 2 6 8 7 3 9 8 5 1 10 4 6 4 1 4 6 7 3 1 9 10 3 2 1 7 2 5 10 1 2 7 2 1 5 8 7 9 2 4 6 9 3 8 10 7 8 5 5 4 8 6 5 10 3 5 5 7 8 1 4 7 4 1 10 8 9 5 4 8 6 10 1 6 2 9 1 5 6 5 3...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 17 18 19 20 32 32 59 60 60 60 60 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
result:
wrong answer 18th lines differ - expected: '52', found: '32'
Subtask #2:
score: 0
Skipped
Dependency #1:
0%
Subtask #3:
score: 0
Skipped
Dependency #1:
0%