제출 #852152

#제출 시각아이디문제언어결과실행 시간메모리
852152lemontiCommuter Pass (JOI18_commuter_pass)C++14
0 / 100
525 ms34244 KiB
#include <bits/stdc++.h> using namespace std; #define int long long int mx[2][100001]; int mx2[2][100001]; struct node { int pos,we; node (int a,int b) { pos=a; we=b; } }; struct node2 { int pos,we,rwe,st,type; node2 (int a,int b,int c,int d,int e) { pos=a; we=b; rwe=c; st=d; type=e; } }; bool cmp2(node2 x,node2 y) { return x.we>y.we; } bool cmp(node x,node y) { return x.we>y.we; } void dij(int type,int st,vector<vector<pair<int,int>>> &v) { priority_queue<node,vector<node>,function<bool(node,node)>> p(cmp); p.push({st,0}); mx[type][st]=0; while (p.empty()==false) { node tmp=p.top();p.pop(); if (tmp.we!=mx[type][tmp.pos]) continue; for (auto it:v[tmp.pos]) { if (it.second+tmp.we<mx[type][it.first]) { mx[type][it.first]=it.second+tmp.we; p.push({it.first,mx[type][it.first]}); } } } } main() { int n,m; cin>>n>>m; int s,t; cin>>s>>t; int u,v; cin>>u>>v; vector<vector<pair<int,int>>> V(n+1); for (int i=0;i<m;i++) { int x,y,w; cin>>x>>y>>w; V[x].push_back({y,w}); V[y].push_back({x,w}); } for (int i=1;i<=n;i++) { mx2[1][i]=mx2[0][i]=mx[1][i]=mx[0][i]=INT_MAX; } dij(1,s,V); dij(0,t,V); priority_queue<node2,vector<node2>,function<bool(node2,node2)>> pr(cmp2); pr.push({u,0,0,0,1}); pr.push({u,0,0,u,0}); mx2[0][u]=0; mx2[1][u]=0; while (pr.empty()==false) { node2 tmp=pr.top();pr.pop(); if (tmp.we!=mx2[tmp.type][tmp.pos]) continue; for (auto it:V[tmp.pos]) { node2 tt=tmp; if (tt.type) { if (tt.we+it.second<mx2[tt.type][it.first]) { mx2[tt.type][it.first]=tt.we+it.second; pr.push({it.first,tt.we+it.second,0,0,tt.type}); } if (it.second+mx[1][tmp.pos]+mx[0][it.first]==mx[1][t]||it.second+mx[0][tmp.pos]+mx[1][it.first]==mx[1][t]) { tt.type=0; tt.st=tt.pos; tt.rwe=it.second; if (tt.we<mx2[tt.type][it.first]) { mx2[tt.type][it.first]=tt.we; pr.push({it.first,tt.we,tt.rwe,tt.st,tt.type}); } } } else { if (tt.we+it.second<mx2[tt.type][it.first]) { mx2[tt.type][it.first]=tt.we+it.second; pr.push({it.first,tt.we+it.second,0,0,tt.type}); } if ((it.second+tt.rwe+mx[1][tt.st]+mx[0][it.first]==mx[1][t]||it.second+tt.rwe+mx[1][it.first]+mx[0][tt.st]==mx[1][t])&&tt.st) { if (tmp.we<mx2[tmp.type][it.first]) { mx2[tmp.type][it.first]=tt.we; pr.push({it.first,tt.we,tt.rwe+it.second,tt.st,tt.type}); } } } } } cout<<min(mx2[0][v],mx2[1][v]); }

컴파일 시 표준 에러 (stderr) 메시지

commuter_pass.cpp:55:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   55 | main()
      | ^~~~
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