結果
問題 | No.3013 ハチマキ買い星人 |
ユーザー |
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提出日時 | 2025-01-25 13:31:41 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 237 ms / 2,000 ms |
コード長 | 4,501 bytes |
コンパイル時間 | 5,959 ms |
コンパイル使用メモリ | 333,372 KB |
実行使用メモリ | 20,952 KB |
最終ジャッジ日時 | 2025-01-25 22:50:04 |
合計ジャッジ時間 | 13,037 ms |
ジャッジサーバーID (参考情報) |
judge7 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 45 |
ソースコード
#include <bits/stdc++.h>#include <atcoder/all>using namespace std;using namespace atcoder;typedef long long ll;typedef unsigned long long ull;typedef long double ld;#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)#define rrep(i,start,end) for (ll i = start;i >= (ll)(end);i--)#define repn(i,end) for(ll i = 0; i <= (ll)(end); i++)#define reps(i,start,end) for(ll i = start; i < (ll)(end); i++)#define repsn(i,start,end) for(ll i = start; i <= (ll)(end); i++)#define each(p,a) for(auto &p:a)typedef vector<ll> vll;typedef vector<pair<ll ,ll>> vpll;typedef vector<vector<ll>> vvll;typedef set<ll> sll;typedef map<ll , ll> mpll;typedef pair<ll ,ll> pll;typedef tuple<ll , ll , ll> tpl3;#define LL(...) ll __VA_ARGS__; input(__VA_ARGS__)#define LD(...) ld __VA_ARGS__; input(__VA_ARGS__)#define Str(...) string __VA_ARGS__; input(__VA_ARGS__)#define Ch(...) char __VA_ARGS__; input(__VA_ARGS__)#define all(a) (a).begin(),(a).end()#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );#define sz(x) (ll)x.size()// << std::fixed << std::setprecision(10)const ll INF = 1LL << 60;const ld EPS = 1e-9;inline ll lfloor(ll x,ll m){return (x - ((x % m+ m)%m))/m;}inline ll positive_mod(ll a,ll m){return (a % m + m)%m;}inline ll popcnt(ull a){ return __builtin_popcountll(a);}//0indexedinline ll topbit(ll a){assert(a != 0);return 63 - __builtin_clzll(a);}inline ll smlbit(ll a){assert(a != 0);return __builtin_ctzll(a);}template<class T> bool chmin(T& a, T b){if(a > b){a = b;return true;}return false;}template<class T> bool chmax(T& a, T b){if(a < b){a = b;return true;}return false;}template<typename T> std::istream &operator>>(std::istream&is,std::vector<T>&v){for(T &in:v){is>>in;}return is;}template<typename T> std::ostream &operator<<(std::ostream&os,const std::vector<T>&v){for(auto it=std::begin(v);it!=std::end(v);){os<<*it<<((++it)!=std::end(v)?" ":"");}return os;}template<typename T1, typename T2>std::ostream &operator<< (std::ostream &os, std::pair<T1,T2> p){os << "{" << p.first << "," << p.second << "}";return os;}template<class... T>void input(T&... a){(cin >> ... >> a);}void print(){cout << endl;}template<class T, class... Ts>void print(const T& a, const Ts&... b){cout << a;((cout << ' ' << b), ...);cout << endl;}template<class T> void pspace(const T& a){ cout << a << ' ';}void perr(){cerr << endl;}template<class T, class... Ts>void perr(const T& a, const Ts&... b){cerr << a;((cerr << ' ' << b), ...);cerr << endl;}void yes(bool i = true){ return print(i?"yes":"no"); }void Yes(bool i = true){ return print(i?"Yes":"No"); }void YES(bool i = true){ return print(i?"YES":"NO"); }template <class T> vector<T> &operator++(vector<T> &v) {for(auto &e : v) e++;return v;}template <class T> vector<T> operator++(vector<T> &v, signed) {auto res = v;for(auto &e : v) e++;return res;}template <class T> vector<T> &operator--(vector<T> &v) {for(auto &e : v) e--;return v;}template <class T> vector<T> operator--(vector<T> &v, signed) {auto res = v;for(auto &e : v) e--;return res;}//grid探索用vector<ll> _ta = {0,0,1,-1,1,1,-1,-1};vector<ll> _yo = {1,-1,0,0,1,-1,1,-1};bool isin(ll now_i,ll now_j,ll h,ll w){return (0<=now_i && now_i < h && 0 <= now_j && now_j < w);}ll lpow(ll x,ll n){ll ans = 1;while(n >0){if(n & 1)ans *= x;x *= x;n >>= 1;}return ans;}ll Modlpow(ll x,ll n,ll m){ll ans = 1;ll a = x%m;while(n >0){if(n & 1){ans *= a;ans%= m;}a *= a;a %= m;n >>= 1;}return ans;}const ll MOD9 = 998244353LL;const ll MOD10 = 1000000007LL;using P = pair<ll,ll>;void Dijkstra(vector<ll> &dis,vector<vector<pair<ll,ll>>> &G,ll s){// G[i]<j,d> i->j の距離(d)// 「仮の最短距離, 頂点」が小さい順に並ぶpriority_queue<P,vector<P>,greater<P>>pq;dis[s] = 0;pq.push({dis[s],s});while(!pq.empty()){auto [len,now] = pq.top();pq.pop();if(dis[now]< len){continue;}for(auto &p:G[now]){// 注意!auto [next,cost] = p;if(dis[next] > dis[now] + cost){dis[next] = dis[now] + cost;pq.push({dis[next],next});}}}}int main(){ios::sync_with_stdio(false);cin.tie(nullptr);LL(n,m,P,Y);vector<vpll> g(n);rep(i,m){LL(a,b,c);a--;b--;g[a].push_back({b,c});g[b].push_back({a,c});}vll dist(n,INF);Dijkstra(dist,g,0);ll ans = 0;rep(i,P){LL(d,e);d--;ll rem = Y - dist[d];if(rem >= 0){chmax(ans,rem/e);}}cout << ans << endl;}