oj.uz

Submission #690583

# Submission time Handle Problem Language Result Execution time Memory
690583 2023-01-30T10:08:53 Z Paul_Liao_1457 Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 331 ms 4300 KB 
//記得跳題
#include<iostream>
#include<array>
#include<vector>
#include<string>
#include<algorithm>
#include<set>
#include<queue>
#include<stack>
#include<math.h>
#include<map>
#include<unordered_map>
#include<cstring>
#include<iomanip>
#include<bitset>
#include<tuple>
 
#define ll long long
#define LL __int128_t
#define DB double
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a,b) for(int i=a;i>=b;i--)
#define pb push_back
#define mp make_pair
#define INF (ll)(1e9+2e8+5)
#define MOD (ll)(1e9+7)
#define F first
#define S second
#define endl "\n"
#define AC ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
using namespace std;
 
template<class T> using PQ=priority_queue<T,vector<T>,greater<T> >;
 
void file(){
    freopen("/Users/liaoyunyang/Desktop/meta_in.txt","r",stdin);
    freopen("/Users/liaoyunyang/Desktop/meta_out.txt","w",stdout);
}

bool used[2][50005],vis[205];
int dis[2][2][205];
int a[50005],b[50005],c[50005],d[50005];
ll tmp[205];
vector<int> e[2][205];

signed main(){
    AC;
        int n,m; cin>>n>>m;
        FOR(i,1,m+1){
            cin>>a[i]>>b[i]>>c[i]>>d[i];
            e[0][a[i]].pb(i);
            e[0][b[i]].pb(i+m);
            e[1][b[i]].pb(i);
        }
        FOR(x,0,2)FOR(y,0,2)FOR(i,0,n+1) dis[x][y][i]=INF;
        PQ<pair<int,pair<int,int> > > pq;
        pq.push({0,{1,0}});
        while(pq.size()){
            int t=pq.top().F,now=pq.top().S.F,id=pq.top().S.S; pq.pop();
            if(dis[0][0][now]!=INF) continue;
            dis[0][0][now]=t; used[0][id]=1;
            for(auto i:e[0][now])if(i<=m){
                pq.push({t+c[i],{b[i],i}});
            }
        }
        pq.push({0,{n,0}});
        while(pq.size()){
            int t=pq.top().F,now=pq.top().S.F; pq.pop();
            if(dis[0][1][now]!=INF) continue;
            dis[0][1][now]=t;
            for(auto i:e[1][now])if(i<=m){
                pq.push({t+c[i],{a[i],i}});
            }
        }
        pq.push({0,{n,0}});
        while(pq.size()){
            int t=pq.top().F,now=pq.top().S.F,id=pq.top().S.S; pq.pop();
            if(dis[1][0][now]!=INF) continue;
            dis[1][0][now]=t; used[1][id]=1;
            for(auto i:e[0][now])if(i<=m){
                pq.push({t+c[i],{b[i],i}});
            }
        }
        pq.push({0,{1,0}});
        while(pq.size()){
            int t=pq.top().F,now=pq.top().S.F; pq.pop();
            if(dis[1][1][now]!=INF) continue;
            dis[1][1][now]=t;
            for(auto i:e[1][now])if(i<=m){
                pq.push({t+c[i],{a[i],i}});
            }
        }
        ll ans=(ll)dis[0][0][n]+dis[1][0][1];
    
    FOR(i,1,m+1){
        //cout<<"ans="<<ans<<endl;
        ll d1=INF,d2=INF;
        if(used[0][i]){
            FOR(j,0,n+2){
                tmp[j]=INF; vis[j]=0;
            }
            int now=n+1;
            tmp[1]=0;
            FOR(x,0,n){
                now=n+1;
                FOR(y,1,n+1)if(!vis[y]&&tmp[y]<tmp[now]){
                    now=y;
                }
                if(now==n+1) break;
                if(now==n) break;
                vis[now]=1;
                for(auto j:e[0][now])if(j!=i){
                    if(j<=m) tmp[b[j]]=min(tmp[b[j]],tmp[now]+c[j]);
                    else if(j==i+m) tmp[a[i]]=min(tmp[a[i]],tmp[now]+c[i]);
                }
            }
            d1=tmp[n];
        }
        else{
            //cout<<"hi"<<endl;
            d1=min((ll)dis[0][0][n],(ll)dis[0][0][b[i]]+dis[0][1][a[i]]+c[i]);
        }
        if(used[1][i]){
            FOR(j,0,n+2){
                tmp[j]=INF; vis[j]=0;
            }
            int now=n+1;
            tmp[n]=0;
            FOR(x,0,n){
                now=n+1;
                FOR(y,1,n+1)if(!vis[y]&&tmp[y]<tmp[now]){
                    now=y;
                }
                if(now==n+1) break;
                if(now==1) break;
                vis[now]=1;
                for(auto j:e[0][now])if(j!=i){
                    if(j<=m) tmp[b[j]]=min(tmp[b[j]],tmp[now]+c[j]);
                    else if(j==i+m) tmp[a[i]]=min(tmp[a[i]],tmp[now]+c[i]);
                }
            }
            d2=tmp[1];
        }
        else{
            //cout<<"i="<<i<<endl;
            d2=min((ll)dis[1][0][1],(ll)dis[1][0][b[i]]+dis[1][1][a[i]]+c[i]);
        }
         //cout<<"d1="<<d1<<" d2="<<d2<<endl;
        ans=min((ll)ans,((ll)d1+(ll)d2+(ll)d[i]));
    }
    if(ans>=INF) cout<<"-1"<<endl;
    else cout<<ans<<endl;
}

 
/*
 4 5
 1 2 4 4
 1 3 2 1
 4 3 1 2
 4 1 6 1
 2 4 2 5
 
 */

Compilation message

ho_t4.cpp: In function 'void file()':
ho_t4.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen("/Users/liaoyunyang/Desktop/meta_in.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ho_t4.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     freopen("/Users/liaoyunyang/Desktop/meta_out.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 356 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 28 ms 396 KB Output is correct
4 Correct 31 ms 340 KB Output is correct
5 Correct 2 ms 352 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 43 ms 352 KB Output is correct
11 Correct 41 ms 340 KB Output is correct
12 Correct 41 ms 416 KB Output is correct
13 Correct 13 ms 400 KB Output is correct
14 Correct 27 ms 396 KB Output is correct
15 Correct 20 ms 340 KB Output is correct
16 Correct 27 ms 340 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 178 ms 3148 KB Output is correct
2 Correct 199 ms 3148 KB Output is correct
3 Correct 144 ms 3028 KB Output is correct
4 Correct 11 ms 524 KB Output is correct
5 Correct 18 ms 440 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 87 ms 2804 KB Output is correct
10 Correct 82 ms 2696 KB Output is correct
11 Correct 163 ms 3124 KB Output is correct
12 Correct 148 ms 3156 KB Output is correct
13 Correct 188 ms 3144 KB Output is correct
14 Correct 160 ms 4300 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 173 ms 2068 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 238 ms 2448 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 105 ms 2420 KB Output is correct
9 Correct 121 ms 2440 KB Output is correct
10 Correct 267 ms 2500 KB Output is correct
11 Correct 119 ms 2516 KB Output is correct
12 Correct 107 ms 2644 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 266 ms 2608 KB Output is correct
20 Correct 138 ms 2468 KB Output is correct
21 Correct 104 ms 3276 KB Output is correct
22 Correct 134 ms 3272 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 356 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 28 ms 396 KB Output is correct
4 Correct 31 ms 340 KB Output is correct
5 Correct 2 ms 352 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 43 ms 352 KB Output is correct
11 Correct 41 ms 340 KB Output is correct
12 Correct 41 ms 416 KB Output is correct
13 Correct 13 ms 400 KB Output is correct
14 Correct 27 ms 396 KB Output is correct
15 Correct 20 ms 340 KB Output is correct
16 Correct 27 ms 340 KB Output is correct
17 Correct 178 ms 3148 KB Output is correct
18 Correct 199 ms 3148 KB Output is correct
19 Correct 144 ms 3028 KB Output is correct
20 Correct 11 ms 524 KB Output is correct
21 Correct 18 ms 440 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 2 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 87 ms 2804 KB Output is correct
26 Correct 82 ms 2696 KB Output is correct
27 Correct 163 ms 3124 KB Output is correct
28 Correct 148 ms 3156 KB Output is correct
29 Correct 188 ms 3144 KB Output is correct
30 Correct 160 ms 4300 KB Output is correct
31 Correct 39 ms 340 KB Output is correct
32 Correct 3 ms 340 KB Output is correct
33 Correct 173 ms 2068 KB Output is correct
34 Correct 2 ms 340 KB Output is correct
35 Correct 238 ms 2448 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 105 ms 2420 KB Output is correct
39 Correct 121 ms 2440 KB Output is correct
40 Correct 267 ms 2500 KB Output is correct
41 Correct 119 ms 2516 KB Output is correct
42 Correct 107 ms 2644 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 0 ms 340 KB Output is correct
49 Correct 266 ms 2608 KB Output is correct
50 Correct 138 ms 2468 KB Output is correct
51 Correct 104 ms 3276 KB Output is correct
52 Correct 134 ms 3272 KB Output is correct
53 Correct 234 ms 3916 KB Output is correct
54 Correct 247 ms 3916 KB Output is correct
55 Correct 139 ms 3924 KB Output is correct
56 Correct 28 ms 340 KB Output is correct
57 Correct 15 ms 460 KB Output is correct
58 Correct 331 ms 2988 KB Output is correct
59 Correct 322 ms 3016 KB Output is correct
60 Correct 320 ms 3040 KB Output is correct
61 Correct 325 ms 3036 KB Output is correct
62 Correct 322 ms 3016 KB Output is correct
63 Correct 327 ms 2988 KB Output is correct
64 Correct 273 ms 3104 KB Output is correct
65 Correct 258 ms 3104 KB Output is correct
66 Correct 237 ms 3112 KB Output is correct
67 Correct 24 ms 3144 KB Output is correct
68 Correct 94 ms 3628 KB Output is correct
69 Correct 89 ms 3732 KB Output is correct
70 Correct 250 ms 4048 KB Output is correct
71 Correct 251 ms 4048 KB Output is correct
72 Correct 185 ms 4196 KB Output is correct
73 Correct 266 ms 4176 KB Output is correct
74 Correct 219 ms 4176 KB Output is correct