結果
問題 | No.1244 Black Segment |
ユーザー | theory_and_me |
提出日時 | 2020-10-03 01:17:10 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 60 ms / 2,000 ms |
コード長 | 4,086 bytes |
コンパイル時間 | 2,055 ms |
コンパイル使用メモリ | 216,524 KB |
実行使用メモリ | 20,192 KB |
最終ジャッジ日時 | 2024-07-18 02:25:35 |
合計ジャッジ時間 | 4,570 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | AC | 1 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 1 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 1 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 3 ms
6,940 KB |
testcase_14 | AC | 23 ms
9,984 KB |
testcase_15 | AC | 3 ms
6,940 KB |
testcase_16 | AC | 22 ms
10,112 KB |
testcase_17 | AC | 3 ms
6,940 KB |
testcase_18 | AC | 32 ms
11,832 KB |
testcase_19 | AC | 48 ms
14,628 KB |
testcase_20 | AC | 48 ms
14,868 KB |
testcase_21 | AC | 36 ms
14,152 KB |
testcase_22 | AC | 50 ms
14,452 KB |
testcase_23 | AC | 51 ms
14,360 KB |
testcase_24 | AC | 49 ms
15,308 KB |
testcase_25 | AC | 50 ms
15,348 KB |
testcase_26 | AC | 42 ms
14,116 KB |
testcase_27 | AC | 38 ms
13,312 KB |
testcase_28 | AC | 53 ms
15,168 KB |
testcase_29 | AC | 46 ms
13,952 KB |
testcase_30 | AC | 50 ms
15,736 KB |
testcase_31 | AC | 44 ms
14,592 KB |
testcase_32 | AC | 41 ms
14,208 KB |
testcase_33 | AC | 42 ms
14,764 KB |
testcase_34 | AC | 60 ms
20,192 KB |
testcase_35 | AC | 57 ms
19,980 KB |
testcase_36 | AC | 56 ms
18,708 KB |
testcase_37 | AC | 56 ms
17,348 KB |
testcase_38 | AC | 50 ms
16,752 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define REP(i,n) for(ll i=0;i<(ll)n;i++) #define dump(x) cerr << "Line " << __LINE__ << ": " << #x << " = " << (x) << "\n"; #define spa << " " << #define fi first #define se second #define ALL(a) (a).begin(),(a).end() #define ALLR(a) (a).rbegin(),(a).rend() using ld = long double; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using pdd = pair<ld, ld>; template<typename T> using V = vector<T>; template<typename T> using P = pair<T, T>; template<typename T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); } template<typename... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); } template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){os << "(" << v.first << ", " << v.second << ")"; return os;} template<typename T> ostream& operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; } template<class T> ostream& operator<<(ostream& os, const vector<vector<T>> &v){ for(auto &e : v){os << e << "\n";} return os;} struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; template <class T> void UNIQUE(vector<T> &x) {sort(ALL(x));x.erase(unique(ALL(x)), x.end());} template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; } void fail() { cout << -1 << '\n'; exit(0); } inline int popcount(const int x) { return __builtin_popcount(x); } inline int popcount(const ll x) { return __builtin_popcountll(x); } template<typename T> void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++) {cerr<<v[i][0];for(ll j=1;j<w;j++)cerr spa v[i][j];cerr<<"\n";}}; template<typename T> void debug(vector<T>&v,ll n){if(n!=0)cerr<<v[0]; for(ll i=1;i<n;i++)cerr spa v[i]; cerr<<"\n";}; const ll INF = (1ll<<62); // const ld EPS = 1e-10; // const ld PI = acos(-1.0); const ll mod = (int)1e9 + 7; //const ll mod = 998244353; template< typename T > struct edge { int src, to; T cost; edge(int to, T cost) : src(-1), to(to), cost(cost) {} edge(int src, int to, T cost) : src(src), to(to), cost(cost) {} edge &operator=(const int &x) { to = x; return *this; } operator int() const { return to; } }; template< typename T > using Edges = vector< edge< T > >; template< typename T > using WeightedGraph = vector< Edges< T > >; using UnWeightedGraph = vector< vector< int > >; template< typename T > using Matrix = vector< vector< T > >; template< typename T > vector< T > Dijkstra(WeightedGraph< T > &g, int s) { const auto INF = numeric_limits< T >::max(); vector< T > dist(g.size(), INF); using Pi = pair< T, int >; priority_queue< Pi, vector< Pi >, greater< Pi > > que; dist[s] = 0; que.emplace(dist[s], s); while(!que.empty()) { T cost; int idx; tie(cost, idx) = que.top(); que.pop(); if(dist[idx] < cost) continue; for(auto &e : g[idx]) { auto next_cost = cost + e.cost; if(dist[e.to] <= next_cost) continue; dist[e.to] = next_cost; que.emplace(dist[e.to], e.to); } } return dist; } int main(){ ll N, M, A, B; cin >> N >> M >> A >> B; A--, B--; V<ll> L(M), R(M); REP(i, M) cin >> L[i] >> R[i]; REP(i, M) L[i]--, R[i]--; using Graph = V<V<edge<ll>>>; Graph G(N+1); REP(i, M){ G[L[i]].emplace_back(R[i]+1, 1); G[R[i]+1].emplace_back(L[i], 1); } REP(i, N+1){ if(i<A){ G[A].emplace_back(i, 0); G[i].emplace_back(A, 0); } if(B+1<i){ G[B+1].emplace_back(i, 0); G[i].emplace_back(B+1, 0); } } // REP(i, N+1){ // dump(i) // for(auto &e: G[i]) cout << e.to spa e.cost << endl; // } auto dist = Dijkstra(G, A); ll res = dist[B+1]; cout << (res >= INF ? -1 : res) << endl; return 0; }