제출 #1077789

#제출 시각아이디문제언어결과실행 시간메모리
1077789hahahahaCommuter Pass (JOI18_commuter_pass)C++17
100 / 100
511 ms25104 KiB
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#define i64 long long #define ld long double #define bit(n,i) ((n>>i)&1) #define pii pair<int,int> #define sz(x) (int)x.size() #define FOR(i,a,b) for(int i=a; i<=b; i++) #define FOD(i,a,b) for(int i=a; i>=b; i--) #define fi first #define se second #define pb push_back #define all(x) x.begin(),x.end() #define __sumairu__ main() #define die_hard_onimai_fan void seggs() #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);} #define brute(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".ans","w",stdout);} #define TIME (1.0*clock()/CLOCKS_PER_SEC) #define FAST ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); #define ai(n) array<int,n> #define dbg(x) {cerr<<#x<<' '<<x<<endl;} #define dbgArr(arr,n) {cerr<<#arr;FOR(_i,1,n)cerr<<' '<<(arr)[_i];cerr<<endl;} template <typename T,typename U> ostream& operator<<(ostream &os,pair<T,U>p){ return os<<"{"<<p.fi<<", "<<p.se<<"}"; } mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count()); #define i64 long long #define debug 0 const int mod=1e9+7; //const int mod=998244353; const int inf=1e9; ///check the limits, dummy const int N=1e5+5; vector<pii>adj[N]; int S,T,U,V; int n,m; i64 d[3][N]; vector<int>nadj[N]; int deg[N]; i64 dpU[N],dpV[N],dp[N]; void dij(int u,i64 d[N]) { fill(d+1,d+n+1,1e18); d[u]=0; priority_queue<pii,vector<pii>,greater<pii>>pq; pq.push({0,u}); while(sz(pq)) { auto [du,u]=pq.top(); pq.pop(); if(du>d[u])continue; for(auto [v,w]:adj[u])if(d[v]>d[u]+w) { d[v]=d[u]+w; pq.push({d[v],v}); } } } die_hard_onimai_fan { cin>>n>>m; cin>>S>>T>>U>>V; vector<ai(3)>eds; FOR(i,1,m) { int u,v,w; cin>>u>>v>>w; eds.pb({u,v,w}); adj[u].pb({v,w}); adj[v].pb({u,w}); } dij(S,d[0]); dij(U,d[1]); dij(V,d[2]); for(auto&&[u,v,w]:eds) { if(d[0][v]==d[0][u]+w)nadj[u].pb(v),deg[v]++; if(d[0][u]==d[0][v]+w)nadj[v].pb(u),deg[u]++; } fill(dp+1,dp+n+1,1e18); fill(dpU+1,dpU+n+1,1e18); fill(dpV+1,dpV+n+1,1e18); queue<int>q; q.push(S); dpU[S]=d[1][S],dpV[S]=d[2][S],dp[S]=dpU[S]+dpV[S]; while(sz(q)) { int u=q.front(); q.pop(); dp[u]=min({dp[u],dpU[u]+d[2][u],dpV[u]+d[1][u]}); for(int v:nadj[u]) { dp[v]=min(dp[v],dp[u]); dpU[v]=min({dpU[v],dpU[u],d[1][v]}); dpV[v]=min({dpV[v],dpV[u],d[2][v]}); if(!--deg[v])q.push(v); } } cout<<min(d[1][V],dp[T]); } __sumairu__ { FAST file(""); int tt=1;//cin>>tt; while(tt--)seggs(); cerr<<"\nTime elapsed: "<<TIME<<" s.\n"; } /** 6 6 1 6 1 4 1 2 1 2 3 1 3 5 1 2 4 3 4 5 2 5 6 1 */

컴파일 시 표준 에러 (stderr) 메시지

commuter_pass.cpp:57:21: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   57 | #define __sumairu__ main()
      |                     ^~~~
commuter_pass.cpp:157:1: note: in expansion of macro '__sumairu__'
  157 | __sumairu__
      | ^~~~~~~~~~~
commuter_pass.cpp: In function 'int main()':
commuter_pass.cpp:59:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
commuter_pass.cpp:160:5: note: in expansion of macro 'file'
  160 |     file("");
      |     ^~~~
commuter_pass.cpp:59:83: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                                                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
commuter_pass.cpp:160:5: note: in expansion of macro 'file'
  160 |     file("");
      |     ^~~~
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