結果

問題 No.20 砂漠のオアシス
ユーザー komori3komori3
提出日時 2018-03-13 01:13:33
言語 C++11
(gcc 13.3.0)
結果
AC  
実行時間 52 ms / 5,000 ms
コード長 5,366 bytes
コンパイル時間 1,507 ms
コンパイル使用メモリ 175,360 KB
実行使用メモリ 9,088 KB
最終ジャッジ日時 2024-11-15 22:15:06
合計ジャッジ時間 2,555 ms
ジャッジサーバーID
(参考情報)
judge4 / judge1
このコードへのチャレンジ
(要ログイン)
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

#define _CRT_SECURE_NO_WARNINGS
#include "bits/stdc++.h"
#include <random>
using namespace std;
//
#define DUMPOUT cerr
#define dump(...) DUMPOUT<<" ";DUMPOUT<<#__VA_ARGS__<<" :["<<__LINE__<<":"<<__FUNCTION__<<"]"<<endl;DUMPOUT<<" ";dump_func(__VA_ARGS__)
typedef unsigned uint; typedef long long ll; typedef unsigned long long ull; typedef pair<int, int> pii; typedef pair<ll, ll> pll; typedef pair
    <double, double> pdd; typedef pair<string, string> pss;
template <typename _KTy, typename _Ty> ostream& operator << (ostream& ostr, const pair<_KTy, _Ty>& m) { ostr << "{" << m.first << ", " << m.second <<
    "}"; return ostr; }
template <typename _KTy, typename _Ty> ostream& operator << (ostream& ostr, const map<_KTy, _Ty>& m) { if (m.empty()) { ostr << "{ }"; return ostr; }
    ostr << "{" << *m.begin(); for (auto itr = ++m.begin(); itr != m.end(); itr++) { ostr << ", " << *itr; } ostr << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const vector<_Ty>& v) { if (v.empty()) { ostr << "{ }"; return ostr; } ostr << "{" << v
    .front(); for (auto itr = ++v.begin(); itr != v.end(); itr++) { ostr << ", " << *itr; } ostr << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const set<_Ty>& s) { if (s.empty()) { ostr << "{ }"; return ostr; } ostr << "{" << *(s
    .begin()); for (auto itr = ++s.begin(); itr != s.end(); itr++) { ostr << ", " << *itr; } ostr << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const stack<_Ty>& s) { if (s.empty()) { ostr << "{ }"; return ostr; } stack<_Ty> t(s);
    ostr << "{" << t.top(); t.pop(); while (!t.empty()) { ostr << ", " << t.top(); t.pop(); } ostr << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const list<_Ty>& l) { if (l.empty()) { ostr << "{ }"; return ostr; } ostr << "{" << l
    .front(); for (auto itr = ++l.begin(); itr != l.end(); ++itr) { ostr << ", " << *itr; } ostr << "}"; return ostr; }
template <typename _KTy, typename _Ty> istream& operator >> (istream& istr, pair<_KTy, _Ty>& m) { istr >> m.first >> m.second; return istr; }
template <typename _Ty> istream& operator >> (istream& istr, vector<_Ty>& v) { for (size_t i = 0; i < v.size(); i++) istr >> v[i]; return istr; }
namespace aux { // print tuple
template<typename Ty, unsigned N, unsigned L> struct tp { static void print(ostream& os, const Ty& v) { os << get<N>(v) << ", "; tp<Ty, N + 1, L
        >::print(os, v); } };
template<typename Ty, unsigned N> struct tp<Ty, N, N> { static void print(ostream& os, const Ty& value) { os << get<N>(value); } };
}
template<typename... Tys> ostream& operator<<(ostream& os, const tuple<Tys...>& t) { os << "{"; aux::tp<tuple<Tys...>, 0, sizeof...(Tys)-1>::print(os
    , t); os << "}"; return os; }
template<typename A, size_t N, typename T> inline void Fill(A(&array)[N], const T &val) { std::fill((T*)array, (T*)(array + N), val); }
void dump_func() { DUMPOUT << endl; }
template <class Head, class... Tail> void dump_func(Head&& head, Tail&&... tail) { DUMPOUT << head; if (sizeof...(Tail) == 0) { DUMPOUT << " "; }
    else { DUMPOUT << ", "; } dump_func(std::move(tail)...); }
#define PI 3.14159265358979323846
#define EPS 1e-11
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define all(x) (x).begin(), (x).end()
#define SZ(x) ((int)(x).size())
#define fake false
template<typename T> using State = pair<T, int>;
template<typename T> using Queue = priority_queue<State<T>, vector<State<T>>, greater<State<T>>>;
template<typename T> vector<T> dijkstra(vector<vector<State<T>>> G, int s) {
vector<T> dist(G.size(), T(1) << 28);
vector<bool> used(G.size(), false);
Queue<T> q;
q.push(State<T>(T(0), s));
//q.emplace(T(0), s);
while (!q.empty()) {
T c; int pos;
tie(c, pos) = q.top(); q.pop();
if (used[pos]) continue;
used[pos] = true; dist[pos] = c;
for (State<T> e : G[pos]) {
if (dist[e.second] <= c + e.first) continue;
q.push(State<T>(c + e.first, e.second));
}
}
return dist;
}
int main()
{
//clock_t start, end;
//start = clock();
cin.tie(0);
ios::sync_with_stdio(false);
int N, V, Ox, Oy;
cin >> N >> V >> Ox >> Oy;
bool oasis = (Ox == 0 && Oy == 0 ? false : true);
Ox--; Oy--;
vector<vector<int>> L(N, vector<int>(N));
cin >> L;
vector<vector<pii>> G(N * N);
for (int i = 0; i < N - 1; i++) {
int v, ni, nj, nv;
for (int j = 0; j < N - 1; j++) {
v = i * N + j;
ni = i; nj = j + 1;
nv = ni * N + nj;
G[v].push_back(pii(L[ni][nj], nv));
G[nv].push_back(pii(L[i][j], v));
ni = i + 1; nj = j;
nv = ni * N + nj;
G[v].push_back(pii(L[ni][nj], nv));
G[nv].push_back(pii(L[i][j], v));
}
v = i * N + N - 1;
nv = (i + 1) * N + N - 1;
G[v].push_back(pii(L[i + 1][N - 1], nv));
G[nv].push_back(pii(L[i][N - 1], v));
v = (N - 1) * N + i;
nv = (N - 1) * N + i + 1;
G[v].push_back(pii(L[N - 1][i + 1], nv));
G[nv].push_back(pii(L[N - 1][i], v));
}
int s_to_g, s_to_o, o_to_g;
s_to_g = dijkstra<int>(G, 0)[N * N - 1];
if (oasis) {
s_to_o = dijkstra<int>(G, 0)[Oy * N + Ox];
o_to_g = dijkstra<int>(G, Oy * N + Ox)[N * N - 1];
}
if (s_to_g < V) cout << "YES" << endl;
else if (oasis && V - s_to_o > 0 && (V - s_to_o) * 2 > o_to_g) cout << "YES" << endl;
else cout << "NO" << endl;
//end = clock();
//printf("%d msec.\n", end - start);
return 0;
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0