結果
| 問題 |
No.1293 2種類の道路
|
| コンテスト | |
| ユーザー |
momohara
|
| 提出日時 | 2020-11-27 14:42:22 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 64 ms / 2,000 ms |
| コード長 | 3,644 bytes |
| コンパイル時間 | 2,439 ms |
| コンパイル使用メモリ | 205,164 KB |
| 最終ジャッジ日時 | 2025-01-16 06:04:42 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 22 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
/*
#include <atcoder/all>
using namespace atcoder;
*/
#define all(hoge) (hoge).begin(), (hoge).end()
#define en '\n'
using ll = long long;
using ull = unsigned long long;
#define rep(i, m, n) for(ll i = (ll)(m); i < (ll)(n); ++i)
#define rep2(i, m, n) for(ll i = (ll)(n)-1; i >= (ll)(m); --i)
#define REP(i, n) rep(i, 0, n)
#define REP2(i, n) rep2(i, 0, n)
template <class T>
using vec = vector<T>;
template <class T>
using vvec = vector<vec<T>>;
typedef pair<ll, ll> P;
using tp = tuple<ll, ll, ll>;
constexpr long long INF = 1LL << 60;
constexpr int INF_INT = 1 << 25;
constexpr long long MOD = (ll)1e9 + 7;
//constexpr long long MOD = 998244353LL;
using ld = long double;
static const ld pi = 3.141592653589793L;
using Array = vector<ll>;
using Matrix = vector<Array>;
/*
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
*/
template <class T>
inline bool chmin(T &a, T b) {
if(a > b) {
a = b;
return true;
}
return false;
}
template <class T>
inline bool chmax(T &a, T b) {
if(a < b) {
a = b;
return true;
}
return false;
}
//グラフ関連
struct Edge {
ll to, cap, rev;
Edge(ll _to, ll _cap, ll _rev) {
to = _to;
cap = _cap;
rev = _rev;
}
};
typedef vector<Edge> Edges;
typedef vector<Edges> Graph;
void add_edge(Graph &G, ll from, ll to, ll cap, bool revFlag, ll revCap) {
G[from].push_back(Edge(to, cap, (ll)G[to].size()));
if(revFlag)
G[to].push_back(Edge(from, revCap, (ll)G[from].size() - 1));
}
class UnionFindUndo {
vector<int> data;
vector<pair<int, int>> history;
int num;
public:
UnionFindUndo(int size) : data(size, -1), num(size) {}
bool unionSet(int x, int y) {
x = root(x);
y = root(y);
if(x != y) {
history.push_back({x, data[x]});
history.push_back({y, data[y]});
if(data[y] < data[x])
swap(x, y);
data[x] += data[y];
data[y] = x;
num--;
}
return x != y;
}
bool findSet(int x, int y) {
return root(x) == root(y);
}
int root(int x) {
return data[x] < 0 ? x : root(data[x]);
}
int size(int x) {
return -data[root(x)];
}
int numSet() {
return num;
}
void snapshot() {
history.clear();
}
void undo() {
data[history.back().first] = history.back().second;
history.pop_back();
data[history.back().first] = history.back().second;
history.pop_back();
}
void rollback() {
while(history.size())
undo();
}
};
void solve() {
ll n;
cin >> n;
ll d, w;
cin >> d >> w;
UnionFindUndo X(2 * n);
REP(i, d) {
ll a, b;
cin >> a >> b;
a--;
b--;
X.unionSet(a, b);
}
REP(i, w) {
ll a, b;
cin >> a >> b;
a--;
b--;
X.unionSet(a + n, b + n);
}
X.snapshot();
vvec<ll> xs(n);
REP(i, n) {
int r = X.root(i);
xs[r].push_back(i);
}
ll ans = 0;
REP(i, n) {
if(xs[i].size() == 0)
continue;
for(auto x : xs[i]) {
X.unionSet(x, x + n);
}
ans += (ll)xs[i].size() * (X.size(i) - 1 - xs[i].size());
X.rollback();
}
cout << ans << en;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
/*
ll t;
cin >> t;
REP(i, t - 1) {
solve();
}*/
solve();
return 0;
}
momohara