oj.uz

Submission #922798

# Submission time Handle Problem Language Result Execution time Memory
922798 2024-02-06T06:44:46 Z vjudge1 Olympic Bus (JOI20_ho_t4) C++17
0 / 100
 958 ms 262144 KB 
#include <bits/stdc++.h>

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

using namespace std;

#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define int ll
#define y1 yy
#define ppb pop_back
#define gcd(a,b) __gcd(a,b)
#define in insert

const int dx[4]={-1,0,1,0};
const int dy[4]={0,-1,0,1};

const int inf=1e18;
const int N=5e4+100;
const int MAX=210;
const int mod=1e9+7;


int n,m;
vector<pair<int,pii>> g[MAX];
int d[MAX][N];
int d1[MAX][N];

void solve(){
  cin>>n>>m;
  for(int i=1;i<=m;i++){
    int u,v,c,d;
    cin>>u>>v>>c>>d;
    g[u].pb({v,{c,i+m}});
    g[v].pb({u,{c+d,i}});
  }
  {
    for(int i=1;i<=n;i++){
      for(int j=0;j<=m;j++){
        d[i][j]=inf;
      }
    }
    set<pair<int,pii>> st;
    for(int j=0;j<=m;j++){
      d[1][j]=0;
      st.in({d[1][j],{1,j}});
    }
    while(!st.empty()){
      int v=st.begin()->S.F;
      int r=st.begin()->S.S;
      st.erase(st.begin());
      for(auto to:g[v]){
        if(to.S.S>m){
          if(to.S.S-m==r)continue;
          if(d[to.F][r]>d[v][r]+to.S.F){
            st.erase({d[to.F][r],{to.F,r}});
            d[to.F][r]=d[v][r]+to.S.F;
            st.in({d[to.F][r],{to.F,r}});
          }
        }
        else{
          if(to.S.S!=r)continue;
          if(d[to.F][r]>d[v][r]+to.S.F){
            st.erase({d[to.F][r],{to.F,r}});
            d[to.F][r]=d[v][r]+to.S.F;
            st.in({d[to.F][r],{to.F,r}});
          }
        }
      }
    }
  }
  {
    for(int i=1;i<=n;i++){
      for(int j=0;j<=m;j++){
        d1[i][j]=inf;
      }
    }
    set<pair<int,pii>> st;
    for(int j=0;j<=m;j++){
      d1[n][j]=0;
      st.in({d1[n][j],{n,j}});
    }
    while(!st.empty()){
      int v=st.begin()->S.F;
      int r=st.begin()->S.S;
      st.erase(st.begin());
      for(auto to:g[v]){
        if(to.S.S>m){
          if(to.S.S-m==r)continue;
          if(d1[to.F][r]>d1[v][r]+to.S.F){
            st.erase({d1[to.F][r],{to.F,r}});
            d1[to.F][r]=d1[v][r]+to.S.F;
            st.in({d1[to.F][r],{to.F,r}});
          }
        }
        else{
          if(to.S.S!=r)continue;
          if(d1[to.F][r]>d1[v][r]+to.S.F){
            st.erase({d1[to.F][r],{to.F,r}});
            d1[to.F][r]=d1[v][r]+to.S.F;
            st.in({d1[to.F][r],{to.F,r}});
          }
        }
      }
    }
  }
  int ans=d[n][0]+d1[1][0];
  for(int i=1;i<=m;i++){
    ans=min(ans,d[n][i]+d1[1][i]);
  }
  if(ans<inf)cout<<ans<<"\n";
  else cout<<-1<<"\n";
}

main(){
  // freopen("prizes.in", "r", stdin);
  // freopen("prizes.out", "w", stdout);
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t=1;
  // cin>>t;
  while(t--){
    solve();
  }
}

Compilation message

ho_t4.cpp:124:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  124 | main(){
      | ^~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 166484 KB Output is correct
2 Correct 20 ms 160348 KB Output is correct
3 Correct 141 ms 166652 KB Output is correct
4 Correct 169 ms 166760 KB Output is correct
5 Correct 45 ms 30808 KB Output is correct
6 Correct 21 ms 160368 KB Output is correct
7 Correct 1 ms 4440 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 7 ms 4444 KB Output is correct
10 Correct 217 ms 166940 KB Output is correct
11 Correct 205 ms 166420 KB Output is correct
12 Correct 197 ms 166736 KB Output is correct
13 Incorrect 93 ms 163492 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 958 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 91 ms 166736 KB Output is correct
2 Correct 22 ms 160484 KB Output is correct
3 Runtime error 806 ms 262144 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #4
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 166484 KB Output is correct
2 Correct 20 ms 160348 KB Output is correct
3 Correct 141 ms 166652 KB Output is correct
4 Correct 169 ms 166760 KB Output is correct
5 Correct 45 ms 30808 KB Output is correct
6 Correct 21 ms 160368 KB Output is correct
7 Correct 1 ms 4440 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 7 ms 4444 KB Output is correct
10 Correct 217 ms 166940 KB Output is correct
11 Correct 205 ms 166420 KB Output is correct
12 Correct 197 ms 166736 KB Output is correct
13 Incorrect 93 ms 163492 KB Output isn't correct
14 Halted 0 ms 0 KB -