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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#525641 | #3556. Making Friends on Joitter is Fun | Dimash | 0 | 6ms | 22728kb | C++17 | 2.5kb | 2024-08-20 19:51:50 | 2024-08-20 19:51:50 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e5 + 12, MOD = (int)1e9 + 7;
int n,m,s[N],p[N];
map<int,int> g[N],gr[N];
map<int,int> G[N],Gr[N];
int get(int v) {
// cerr << v << '\n';
if(p[v] == v) return v;
return p[v] = get(p[v]);
}
ll cl(int x) {
return x * 1ll * (x - 1);
}
ll res = 0;
void merge(int a,int b) {
a = get(a);
b = get(b);
if(a == b) return;
res -= cl(s[a]);
res -= cl(s[b]);
res -= g[a][b] * 1ll * s[b];
res -= g[b][a] * 1ll * s[a];
g[b].erase(a);
g[a].erase(b);
res += cl(s[a] + s[b]);
{
for(auto [x,ok]:Gr[a]) {
if(!ok) continue;
if(get(x) == b) continue;
int z = get(x);
if(G[x][b] != 1) {
g[z][b]++;
gr[b][z]++;
res += s[b];
}
G[x][b] = 1;
Gr[b][x] = 1;
}
}
{
for(auto [x,ok]:Gr[b]) {
if(!ok) continue;
if(get(x) == a) continue;
if(G[x][a] != 1) {
res += s[a];
}
}
}
{
for(auto [x,y]:g[a]) {
g[b][x] += y;
gr[x][b] += y;
}
}
p[a] = b;
s[b] += s[a];
// cerr << a << ' ' << b << '\n';
// for(auto [x,y]:g[b]) {
// cerr << x << ' ' << y << ' ' << g[x][b] << "y\n";
// }
// cerr << (int)g[b].size() << "x\n";
vector<pair<int,int>> f;
for(auto [x,y]:g[b]) {
if(!y) continue;
if(g[x][b]) {
f.push_back({b,x});
}
}
for(auto [c,d]:f) {
merge(c,d);
}
}
//G vertex->component
//g comp->comp
void test() {
cin >> n >> m;
for(int i = 1;i <= n;i++) {
p[i] = i;
s[i] = 1;
}
for(int i = 1;i <= m;i++) {
int a,b;
cin >> a >> b;
int x = get(a),y = get(b);
if(x == y || G[a][y]) {
cout << res << '\n';
continue;
}
if(!g[y][x]) {
G[a][y] = 1;Gr[y][a] = 1;
g[x][y] += 1;gr[y][x] += 1;
res += s[y];
cout << res << '\n';
} else {
// cerr << a << ' ' << b << '\n';
merge(a,b);
cout << res << '\n';
}
}
}
int main() {
ios_base::sync_with_stdio(false);cin.tie(0);
int t = 1;
// cin >> t;
while(t--) {
test();
}
}
详细
Subtask #1:
score: 0
Wrong Answer
Test #1:
score: 1
Accepted
time: 3ms
memory: 22728kb
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: 6ms
memory: 22284kb
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: 0
Wrong Answer
time: 0ms
memory: 22372kb
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 16 21 21 21 21 21 21 21 21 21 21
result:
wrong answer 10th lines differ - expected: '15', found: '16'
Subtask #2:
score: 0
Skipped
Dependency #1:
0%
Subtask #3:
score: 0
Skipped
Dependency #1:
0%