結果
問題 | No.848 なかよし旅行 |
ユーザー | kissshot7 |
提出日時 | 2020-07-28 15:21:09 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 94 ms / 2,000 ms |
コード長 | 4,216 bytes |
コンパイル時間 | 1,968 ms |
コンパイル使用メモリ | 177,264 KB |
実行使用メモリ | 12,840 KB |
最終ジャッジ日時 | 2024-11-08 01:17:28 |
合計ジャッジ時間 | 3,690 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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 | 94 ms
12,840 KB |
testcase_01 | AC | 5 ms
7,552 KB |
testcase_02 | AC | 5 ms
7,808 KB |
testcase_03 | AC | 5 ms
7,552 KB |
testcase_04 | AC | 5 ms
7,552 KB |
testcase_05 | AC | 5 ms
7,680 KB |
testcase_06 | AC | 5 ms
7,552 KB |
testcase_07 | AC | 5 ms
7,552 KB |
testcase_08 | AC | 6 ms
7,552 KB |
testcase_09 | AC | 6 ms
7,680 KB |
testcase_10 | AC | 6 ms
7,680 KB |
testcase_11 | AC | 22 ms
9,344 KB |
testcase_12 | AC | 27 ms
9,600 KB |
testcase_13 | AC | 34 ms
10,368 KB |
testcase_14 | AC | 16 ms
8,320 KB |
testcase_15 | AC | 32 ms
10,368 KB |
testcase_16 | AC | 49 ms
12,032 KB |
testcase_17 | AC | 35 ms
11,136 KB |
testcase_18 | AC | 21 ms
9,216 KB |
testcase_19 | AC | 20 ms
8,832 KB |
testcase_20 | AC | 9 ms
7,936 KB |
testcase_21 | AC | 41 ms
11,136 KB |
testcase_22 | AC | 37 ms
11,520 KB |
testcase_23 | AC | 14 ms
7,680 KB |
testcase_24 | AC | 5 ms
7,552 KB |
testcase_25 | AC | 51 ms
11,904 KB |
testcase_26 | AC | 5 ms
7,680 KB |
testcase_27 | AC | 5 ms
7,680 KB |
testcase_28 | AC | 5 ms
7,680 KB |
testcase_29 | AC | 5 ms
7,680 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; //#define int long long typedef long long ll; typedef unsigned long long ul; typedef unsigned int ui; const ll mod = 1000000007; const ll INF = mod * mod; const int INF_N = 1e+9; typedef pair<int, int> P; #define stop char nyaa;cin>>nyaa; #define rep(i,n) for(int i=0;i<n;i++) #define per(i,n) for(int i=n-1;i>=0;i--) #define Rep(i,sta,n) for(int i=sta;i<n;i++) #define rep1(i,n) for(int i=1;i<=n;i++) #define per1(i,n) for(int i=n;i>=1;i--) #define Rep1(i,sta,n) for(int i=sta;i<=n;i++) #define all(v) (v).begin(),(v).end() typedef pair<ll, ll> LP; typedef long double ld; typedef pair<ld, ld> LDP; const ld eps = 1e-12; const ld pi = acos(-1.0); //typedef vector<vector<ll>> mat; typedef vector<int> vec; //繰り返し二乗法 ll mod_pow(ll a, ll n, ll m) { ll res = 1; while (n) { if (n & 1)res = res * a%m; a = a * a%m; n >>= 1; } return res; } struct modint { ll n; modint() :n(0) { ; } modint(ll m) :n(m) { if (n >= mod)n %= mod; else if (n < 0)n = (n%mod + mod) % mod; } operator int() { return n; } }; bool operator==(modint a, modint b) { return a.n == b.n; } modint operator+=(modint &a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; } modint operator-=(modint &a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; } modint operator*=(modint &a, modint b) { a.n = ((ll)a.n*b.n) % mod; return a; } modint operator+(modint a, modint b) { return a += b; } modint operator-(modint a, modint b) { return a -= b; } modint operator*(modint a, modint b) { return a *= b; } modint operator^(modint a, int n) { if (n == 0)return modint(1); modint res = (a*a) ^ (n / 2); if (n % 2)res = res * a; return res; } //逆元(Eucledean algorithm) ll inv(ll a, ll p) { return (a == 1 ? 1 : (1 - p * inv(p%a, a)) / a + p); } modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); } const int max_n = 1 << 18; modint fact[max_n], factinv[max_n]; void init_f() { fact[0] = modint(1); for (int i = 0; i < max_n - 1; i++) { fact[i + 1] = fact[i] * modint(i + 1); } factinv[max_n - 1] = modint(1) / fact[max_n - 1]; for (int i = max_n - 2; i >= 0; i--) { factinv[i] = factinv[i + 1] * modint(i + 1); } } modint comb(int a, int b) { if (a < 0 || b < 0 || a < b)return 0; return fact[a] * factinv[b] * factinv[a - b]; } using mP = pair<modint, modint>; int dx[4] = { 0,1,0,-1 }; int dy[4] = { 1,0,-1,0 }; // 負の閉路がある場合は使用不可 const int MAX_V=2003; struct edge { ll to; ll cost; }; // <最短距離, 頂点の番号> // using P = pair<int, int>; int V; vector<edge> G[MAX_V]; ll d[MAX_V]; int pre[MAX_V]; void dijkstra(int s) { priority_queue<P, vector<P>, greater<P> > que; fill(d, d+V, INF); fill(pre, pre+V, -1); d[s] = 0; que.push(P(0, s)); while (!que.empty()) { P p = que.top(); que.pop(); int v = p.second; if (d[v] < p.first) continue; for (int i=0; i<G[v].size(); ++i) { edge e = G[v][i]; if (d[e.to] > d[v] + e.cost) { d[e.to] = d[v] + e.cost; pre[e.to] = v; que.push(P(d[e.to], e.to)); } } } } void solve() { ll N, M, p, q, T; cin >> N >> M >> p >> q >> T; V = N; p--; q--; rep(i, M){ ll a, b, c; cin >> a >> b >> c; a--; b--; G[a].push_back({b, c}); G[b].push_back({a, c}); } ll d1[MAX_V], dp[MAX_V], dq[MAX_V]; dijkstra(0); rep(i, MAX_V) d1[i]=d[i]; dijkstra(p); rep(i, MAX_V) dp[i]=d[i]; dijkstra(q); rep(i, MAX_V) dq[i]=d[i]; if(d1[p] + dp[q] + dq[1] <= T){ cout << T << endl; return; }else if(max(2*d1[p], 2*d1[q]) > T){ cout << -1 << endl; return; } ll res = 0; rep(i, N){ rep(j, N){ ll tmp = max(dp[i]+dp[j], dq[i]+dq[j]); if(d1[i] + tmp + d1[j] <= T) res = max(res, T-tmp); } } cout << res << endl; } signed main() { ios::sync_with_stdio(false); cin.tie(0); //cout << fixed << setprecision(10); //init_f(); //init(); //int t; cin >> t; rep(i, t)solve(); solve(); // stop return 0; }