結果
問題 | No.20 砂漠のオアシス |
ユーザー | shihu |
提出日時 | 2024-09-27 15:35:30 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 28 ms / 5,000 ms |
コード長 | 3,038 bytes |
コンパイル時間 | 6,135 ms |
コンパイル使用メモリ | 302,900 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-27 15:35:37 |
合計ジャッジ時間 | 7,145 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,812 KB |
testcase_03 | AC | 3 ms
6,816 KB |
testcase_04 | AC | 3 ms
6,816 KB |
testcase_05 | AC | 18 ms
6,940 KB |
testcase_06 | AC | 13 ms
6,940 KB |
testcase_07 | AC | 28 ms
6,944 KB |
testcase_08 | AC | 17 ms
6,944 KB |
testcase_09 | AC | 25 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 3 ms
6,940 KB |
testcase_13 | AC | 3 ms
6,940 KB |
testcase_14 | AC | 4 ms
6,944 KB |
testcase_15 | AC | 3 ms
6,940 KB |
testcase_16 | AC | 6 ms
6,940 KB |
testcase_17 | AC | 5 ms
6,940 KB |
testcase_18 | AC | 6 ms
6,940 KB |
testcase_19 | AC | 7 ms
6,940 KB |
testcase_20 | AC | 2 ms
6,944 KB |
ソースコード
// #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> #include <atcoder/all> using namespace std; using namespace atcoder; using mint = modint998244353; // using mint = modint1000000007; using ll = long long; using ull = unsigned long long; using ld = long double; using pii = pair<int, int>; using pll = pair<ll, ll>; using T = tuple<int, int, int>; using G = vector<vector<int>>; #define rep(i, n) for (ll i = 0; i < (n); ++i) #define rep2(i, a, b) for (ll i = a; i < (b); ++i) #define rrep2(i, a, b) for (ll i = a-1; i >= (b); --i) #define rep3(i, a, b, c) for (ll i = a; i < (b); i+=c) #define rng(a) a.begin(),a.end() #define rrng(a) a.rbegin(),a.rend() #define popcount __builtin_popcount #define popcountll __builtin_popcountll #define fi first #define se second #define UNIQUE(v) sort(rng(v)), v.erase(unique(rng(v)), v.end()) #define MIN(v) *min_element(rng(v)) #define MAX(v) *max_element(rng(v)) template<class T> bool chmin(T &a,T b){if(a>b){a=b;return 1;}else return 0;} template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;} template<class T> void printv(vector<T> &v){rep(i,v.size())cout<<v[i]<<" \n"[i==v.size()-1];} template<class T> void printvv(vector<vector<T>> &v){rep(i,v.size())rep(j,v[i].size())cout<<v[i][j]<<" \n"[j==v[i].size()-1];cout<<endl;} const ll dx[] = {0, 1, 0, -1}; const ll dy[] = {1, 0, -1, 0}; const ll dxx[] = {0, 1, 0, -1, 1, -1, 1, -1}; const ll dyy[] = {1, 0, -1, 0, 1, 1, -1, -1}; const ll LINF = 1001002003004005006ll; const int INF = 1001001001; int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); int n, h; cin >> n >> h; int ox, oy; cin >> oy >> ox; ox--, oy--; vector<vector<pii>> g(n*n); rep(i, n)rep(j, n){ int w; cin >> w; rep(t, 4){ int ni = i+dx[t], nj = j+dy[t]; if (ni < 0 || ni >= n || nj < 0 || nj >= n) continue; g[ni*n+nj].emplace_back(i*n+j, w); } } auto dijkstra = [&](int sx, int sy, int gx, int gy, int &h, int f)-> bool{ vector<int> dist(n*n, INF); dist[sx*n+sy] = 0; priority_queue<pii, vector<pii>, greater<pii>> pq; pq.emplace(0, sx*n+sy); while(!pq.empty()){ auto [c, u] = pq.top(); pq.pop(); if (dist[u] < c) continue; for(auto [v, w]: g[u]){ if (dist[v] > dist[u]+w && dist[u]+w < h){ dist[v] = dist[u]+w; pq.emplace(dist[v], v); } } } if (f) h -= dist[gx*n+gy]; return dist[gx*n+gy] != INF; }; if (dijkstra(0, 0, n-1, n-1, h, 0)){ cout << "YES" << endl; return 0; } if (ox != -1){ if (!dijkstra(0, 0, ox, oy, h, 1)){ cout << "NO" << endl; return 0; } h *= 2; if (dijkstra(ox, oy, n-1, n-1, h, 1)){ cout << "YES" << endl; return 0; } } cout << "NO" << endl; return 0; }