結果
問題 | No.1344 Typical Shortest Path Sum |
ユーザー |
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提出日時 | 2021-01-16 13:36:45 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 7 ms / 2,000 ms |
コード長 | 5,178 bytes |
コンパイル時間 | 2,359 ms |
コンパイル使用メモリ | 204,148 KB |
最終ジャッジ日時 | 2025-01-17 22:11:03 |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 77 |
ソースコード
#include <bits/stdc++.h> using namespace std; const long long MOD=1000000007; // const long long MOD=998244353; #define LOCAL #pragma region Macros typedef long long ll; typedef __int128_t i128; typedef unsigned int uint; typedef unsigned long long ull; #define ALL(x) (x).begin(),(x).end() const int INF=1e9; const long long IINF=1e18; const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1}; const char dir[4]={'D','R','U','L'}; template<typename T> istream &operator>>(istream &is,vector<T> &v){ for (T &x:v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os,const vector<T> &v){ for (int i=0;i<v.size();++i){ os << v[i] << (i+1==v.size()?"": " "); } return os; } template<typename T,typename U> ostream &operator<<(ostream &os,const pair<T,U> &p){ os << '(' << p.first << ',' << p.second << ')'; return os; } template<typename T,typename U,typename V> ostream&operator<<(ostream &os,const tuple<T,U,V> &t){ os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ')'; return os; } template<typename T,typename U,typename V,typename W> ostream&operator<<(ostream &os,const tuple<T,U,V,W> &t){ os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ',' << get<3>(t) << ')'; return os; } template<typename T,typename U> ostream &operator<<(ostream &os,const map<T,U> &m){ os << '{'; for (auto itr=m.begin();itr!=m.end();){ os << '(' << itr->first << ',' << itr->second << ')'; if (++itr!=m.end()) os << ','; } os << '}'; return os; } template<typename T,typename U> ostream &operator<<(ostream &os,const unordered_map<T,U> &m){ os << '{'; for (auto itr=m.begin();itr!=m.end();){ os << '(' << itr->first << ',' << itr->second << ')'; if (++itr!=m.end()) os << ','; } os << '}'; return os; } template<typename T> ostream &operator<<(ostream &os,const set<T> &s){ os << '{'; for (auto itr=s.begin();itr!=s.end();){ os << *itr; if (++itr!=s.end()) os << ','; } os << '}'; return os; } template<typename T> ostream &operator<<(ostream &os,const multiset<T> &s){ os << '{'; for (auto itr=s.begin();itr!=s.end();){ os << *itr; if (++itr!=s.end()) os << ','; } os << '}'; return os; } template<typename T> ostream &operator<<(ostream &os,const unordered_set<T> &s){ os << '{'; for (auto itr=s.begin();itr!=s.end();){ os << *itr; if (++itr!=s.end()) os << ','; } os << '}'; return os; } template<typename T> ostream &operator<<(ostream &os,const deque<T> &v){ for (int i=0;i<v.size();++i){ os << v[i] << (i+1==v.size()?"": " "); } return os; } void debug_out(){cerr << '\n';} template<class Head,class... Tail> void debug_out(Head&& head,Tail&&... tail){ cerr << head; if (sizeof...(Tail)>0) cerr << ", "; debug_out(move(tail)...); } #ifdef LOCAL #define debug(...) cerr << " ";\ cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\ cerr << " ";\ debug_out(__VA_ARGS__) #else #define debug(...) 42 #endif template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;} template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;} template<class T1,class T2> inline bool chmin(T1 &a,T2 b){ if (a>b){a=b; return true;} return false; } template<class T1,class T2> inline bool chmax(T1 &a,T2 b){ if (a<b){a=b; return true;} return false; } #pragma endregion template<typename T> struct BellmanFord{ const T inf=numeric_limits<T>::max(); struct edge{ int u,v; T w; edge(int u,int v,T w):u(u),v(v),w(w){} }; int n; vector<vector<int>> G; vector<int> check,reach; vector<edge> es; BellmanFord(int n):n(n),G(n),check(n),reach(n,1){} void add_edge(int u,int v,T w){ es.emplace_back(u,v,w); G[u].emplace_back(v); } vector<T> build(int s,int &neg_loop){ vector<T> d(n,inf); d[s]=0; for (int i=0;i<n;++i){ bool update=false; for (auto e:es){ if (!reach[e.u]||!reach[e.v]||d[e.u]==inf) continue; if (d[e.u]+e.w<d[e.v]){ d[e.v]=d[e.u]+e.w; update=true; } } if (!update) break; if (i==n-1){neg_loop=1; return d;} } neg_loop=0; return d; } void dfs(int v){ if (check[v]) return; check[v]=1; for (int u:G[v]) dfs(u); } T shortest_path(int s,int t,int &neg_loop){ for (int i=0;i<n;++i){ fill(check.begin(),check.end(),0); dfs(i); reach[i]=check[t]; } return build(s,neg_loop)[t]; } }; int main(){ cin.tie(0); ios::sync_with_stdio(false); int N,M; cin >> N >> M; BellmanFord<ll> BF(N); for (;M--;){ int s,t; ll d; cin >> s >> t >> d; BF.add_edge(--s,--t,d); } for (int i=0;i<N;++i){ int flag; vector<ll> res=BF.build(i,flag); ll ans=0; for (int j=0;j<N;++j) ans+=(res[j]>IINF?0:res[j]); cout << ans << '\n'; } }