結果

問題 No.416 旅行会社
ユーザー outline
提出日時 2022-11-04 14:15:35
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 342 ms / 4,000 ms
コード長 3,366 bytes
コンパイル時間 1,574 ms
コンパイル使用メモリ 145,900 KB
最終ジャッジ日時 2025-02-08 17:09:09
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
other AC * 21
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <string>
#include <map>
#include <set>
#include <stack>
#include <tuple>
#include <deque>
#include <array>
#include <numeric>
#include <bitset>
#include <iomanip>
#include <cassert>
#include <chrono>
#include <random>
#include <limits>
#include <iterator>
#include <functional>
#include <sstream>
#include <fstream>
#include <complex>
#include <cstring>
#include <unordered_map>
#include <unordered_set>
using namespace std;
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
// #pragma GCC target("avx512f,avx512dq,avx512cd,avx512bw,avx512vl")
using ll = long long;
constexpr int INF = 1001001001;
constexpr int mod = 1000000007;
// constexpr int mod = 998244353;
template<class T>
inline bool chmax(T& x, T y){
if(x < y){
x = y;
return true;
}
return false;
}
template<class T>
inline bool chmin(T& x, T y){
if(x > y){
x = y;
return true;
}
return false;
}
constexpr int dx[] = {1, 0, -1, 0, 1, 1, -1, -1};
constexpr int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};
struct PartiallyPersistentUnionFind {
vector<int> data;
vector<int> last;
vector<vector<pair<int, int>>> history;
PartiallyPersistentUnionFind() = default;
PartiallyPersistentUnionFind(int sz){
data.resize(sz, -1);
last.resize(sz, 1e+9);
history.resize(sz);
for(auto& vs : history) vs.emplace_back(-1, -1);
}
int find(int t, int x){
if(t < last[x]) return x;
return find(t, data[x]);
}
bool same(int t, int x, int y){
return find(t, x) == find(t, y);
}
bool unite(int t, int x, int y){
x = find(t, x);
y = find(t, y);
if(x == y) return false;
if(data[x] > data[y]) swap(x, y);
data[x] += data[y];
history[x].emplace_back(t, data[x]);
data[y] = x;
last[y] = t;
return true;
}
int size(int t, int x){
x = find(t, x);
return -prev(lower_bound(begin(history[x]), end(history[x]), make_pair(t, 0))) -> second;
}
};
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int N, M, Q;
cin >> N >> M >> Q;
vector<int> A(M), B(M), C(Q), D(Q);
for(int i = 0; i < M; ++i){
cin >> A[i] >> B[i];
--A[i], --B[i];
}
set<pair<int, int>> destroy_bridge;
for(int i = 0; i < Q; ++i){
cin >> C[i] >> D[i];
--C[i], --D[i];
destroy_bridge.emplace(C[i], D[i]);
}
for(int i = 0; i < M; ++i){
if(destroy_bridge.count(make_pair(A[i], B[i]))) continue;
C.emplace_back(A[i]);
D.emplace_back(B[i]);
}
reverse(begin(C), end(C));
reverse(begin(D), end(D));
PartiallyPersistentUnionFind uf(N);
for(int i = 0; i < M; ++i){
uf.unite(i, C[i], D[i]);
}
vector<int> ans(N, -1);
for(int i = 1; i < N; ++i){
int ng = -1, ok = M;
while(ok - ng > 1){
int m = (ng + ok) / 2;
(uf.same(m, 0, i) ? ok : ng) = m;
}
ans[i] = M - ok;
if(ans[i] > Q) ans[i] = -1;
}
for(int i = 1; i < N; ++i){
cout << ans[i] << '\n';
}
return 0;
}
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