oj.uz

Submission #541311

# Submission time Handle Problem Language Result Execution time Memory
541311 2022-03-23T02:15:26 Z nathanlee726 Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 247 ms 5716 KB 
//#include<i_am_noob_orz>
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
#define ll long long
#define int ll
#define ull unsigned long long
#define pii pair<int,int>
#define X first
#define Y second
#define mod ((ll)1e9+7)
#define pb push_back
#define mp make_pair
#define abs(x) ((x)>0?(x):(-(x)))
#define F(n) Fi(i,n)
#define Fi(i,n) Fl(i,0,n)
#define Fl(i,l,n) for(int i=l;i<n;i++)
#define memres(a) memset(a,0,sizeof(a))
#define all(a) a.begin(),a.end()
#define sz(a) ((int)a.size())
#define ceiling(a,b) (((a)+(b)-1)/(b))
#define endl '\n'
#define bit_count(x) __builtin_popcountll((x))
#define ykh mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define jimmy_is_kind false
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> rbtree;

//#define LOCAL
#ifdef LOCAL
#define bug(...) cerr<<"#"<<__LINE__<<' '<<#__VA_ARGS__<<"- ", _do(__VA_ARGS__)
template<typename T> void _do(T && x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T && x, S&&...y) {cerr<<x<<", "; _do(y...);}
#define IOS()
#else
#define IOS() ios_base::sync_with_stdio(0), cin.tie(0)
#define endl '\n'
#define bug(...)
#endif

int add(int a,int b){return(a+b>=mod?a+b-mod:a+b);}
int sub(int a,int b){return(a<b?a+mod-b:a-b);}
int po(int a,int b){
	if(b==0)return 1;
	if(b==1)return(a%mod);
	int tem=po(a,b/2);
	if(b&1)return(((tem*tem)%mod)*a)%mod;
	else return(tem*tem)%mod;
}
int GCD(int a,int b){
	int x=0;
	int ra,rb;
	while(a&&b){
		if(((a&1)==0)&&((b&1)==0)){
			a>>=1,b>>=1,x++;
		}
		else if((a^b)&1){
			if(a&1)b>>=1;
			else a>>=1;
		}
		else{
			ra=abs(a-b),rb=min(a,b);
			a=ra,b=rb;
		}
	}
	return max(a,b)<<x;
}
int gcd(int a,int b){if(b==0)return a;return gcd(b,a%b);}

int n,m,a[205],aa[205],b[205],c[205],cc[205],d[205];
vector<int> g[205];
vector<pair<pii,pii> > edge;
priority_queue<pii,vector<pii>,greater<pii> >pq;
bool ud[205],ued[50010];
int tab[205][205];

int fdmn(){
    F(n)a[i]=1e15;
    memres(ud);
    a[0]=0;
    F(n){
        int p=-1,mn=1e16;
        Fi(j,n)if(a[j]<mn&&!ud[j])p=j,mn=a[j];
        //bug(p);
        if(p==-1)break;
        ud[p]=1;
        Fi(j,n){
            if(ud[j])continue;
            a[j]=min(a[j],a[p]+tab[p][j]);
        }
    }
    int ts=a[n-1];
    //bug(ts);
    F(n)a[i]=1e15;
    memres(ud);
    a[n-1]=0;
    F(n){
        int p=-1,mn=1e16;
        Fi(j,n)if(a[j]<mn&&!ud[j])p=j,mn=a[j];
        if(p==-1)break;
        ud[p]=1;
        Fi(j,n){
            if(ud[j])continue;
            a[j]=min(a[j],a[p]+tab[p][j]);
        }
    }
    return ts+a[0];
}

signed main(){
	IOS();
    //freopen("01-13.txt","r",stdin);
	cin>>n>>m;
	F(m){
        int v,u,c,d;
        cin>>v>>u>>c>>d;
        d+=c;
        //if(d<1e7)bug(u,v,i,d);
        --u,--v;
        g[u].pb(i);
        g[v].pb(i);
        edge.pb({{v,u},{c,d}});
	}
	F(n)a[i]=b[i]=c[i]=d[i]=1e15;
	memset(aa,-1,sizeof(aa));
	memset(cc,-1,sizeof(cc));
	memres(ud);
	pq.push({0,-1});
	while(!pq.empty()){
        pii pt=pq.top();pq.pop();
        int p=(pt.Y==-1?0:edge[pt.Y].X.Y);
        if(ud[p])continue;
        ud[p]=1;
        a[p]=pt.X;
        aa[p]=pt.Y;
        if(p==n-1)continue;
        for(int id:g[p]){
            if(edge[id].X.X!=p)continue;
            if(ud[edge[id].X.Y])continue;
            pq.push({pt.X+edge[id].Y.X,id});
        }
	}
	pq.push({0,0});
	memres(ud);
	while(!pq.empty()){
        pii pt=pq.top();pq.pop();
        if(ud[pt.Y])continue;
        ud[pt.Y]=1;
        b[pt.Y]=pt.X;
        if(pt.Y==n-1)continue;
        for(int id:g[pt.Y]){
            if(edge[id].X.Y!=pt.Y)continue;
            if(ud[edge[id].X.X])continue;
            pq.push({pt.X+edge[id].Y.X,edge[id].X.X});
        }
	}
	pq.push({0,-1});
	memres(ud);
	while(!pq.empty()){
        pii pt=pq.top();pq.pop();
        int p=(pt.Y==-1?n-1:edge[pt.Y].X.Y);
        if(ud[p])continue;
        ud[p]=1;
        c[p]=pt.X;
        //bug(p,pt.X);
        cc[p]=pt.Y;
        if(p==0)continue;
        for(int id:g[p]){
            if(edge[id].X.X!=p)continue;
            if(ud[edge[id].X.Y])continue;
            pq.push({pt.X+edge[id].Y.X,id});
        }
	}
	pq.push({0,n-1});
	memres(ud);
	while(!pq.empty()){
        pii pt=pq.top();pq.pop();
        if(ud[pt.Y])continue;
        ud[pt.Y]=1;
        d[pt.Y]=pt.X;
        if(pt.Y==0)continue;
        for(int id:g[pt.Y]){
            if(edge[id].X.Y!=pt.Y)continue;
            if(ud[edge[id].X.X])continue;
            pq.push({pt.X+edge[id].Y.X,edge[id].X.X});
        }
	}
	int ans=a[n-1]+c[0];
	//F(n)bug(a[i]);
	//F(n)bug(c[i]);
	int p=n-1;
	vector<int> v;
	F(n){
	    //bug(aa[i],cc[i]);
        if(aa[i]!=-1)v.pb(aa[i]);
        if(cc[i]!=-1)v.pb(cc[i]);
	}
	memres(ued);
	//bug(ans);
	for(int i:v)ued[i]=1;
	F(sz(edge)){
        if(ued[i])continue;
        pair<pii,pii> tp=edge[i];
        ans=min(ans,a[tp.X.Y]+tp.Y.Y+d[tp.X.X]+c[0]);
        ans=min(ans,a[n-1]+c[tp.X.Y]+tp.Y.Y+b[tp.X.X]);
        ans=min(ans,a[tp.X.Y]+tp.Y.Y+d[tp.X.X]+c[tp.X.Y]+tp.Y.X+b[tp.X.X]);
        //bug(i,ans,tp.Y.Y,a[n-1],c[tp.X.Y],b[tp.X.X]);
        //bug(i,ans,tp.Y.Y,a[tp.X.Y],d[tp.X.X],c[0]);
	}
	//bug(ans);
	int cnt=0;
	F(m){
	    if(!ued[i])continue;
	    bug(i);
	    Fi(j,n)Fi(k,n)tab[j][k]=1e15;
	    Fi(j,sz(edge)){
            if(j==i)tab[edge[j].X.Y][edge[j].X.X]=min(tab[edge[j].X.Y][edge[j].X.X],edge[j].Y.Y);
            else tab[edge[j].X.X][edge[j].X.Y]=min(tab[edge[j].X.X][edge[j].X.Y],edge[j].Y.X);
	    }
	    //Fi(j,n)Fi(k,n)bug(j,k,tab[j][k]);
	    ans=min(ans,fdmn());
	    //bug(ans);
	}
	//bug(sz(v));
	cout<<(ans<1e15?ans:-1)<<endl;
	return 0;
}

Compilation message

ho_t4.cpp: In function 'int main()':
ho_t4.cpp:192:6: warning: unused variable 'p' [-Wunused-variable]
  192 |  int p=n-1;
      |      ^
ho_t4.cpp:212:6: warning: unused variable 'cnt' [-Wunused-variable]
  212 |  int cnt=0;
      |      ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 772 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 113 ms 776 KB Output is correct
4 Correct 103 ms 780 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 4 ms 724 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 88 ms 776 KB Output is correct
11 Correct 107 ms 780 KB Output is correct
12 Correct 100 ms 724 KB Output is correct
13 Correct 46 ms 764 KB Output is correct
14 Correct 96 ms 736 KB Output is correct
15 Correct 100 ms 796 KB Output is correct
16 Correct 80 ms 808 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 217 ms 4404 KB Output is correct
2 Correct 247 ms 4376 KB Output is correct
3 Correct 217 ms 4400 KB Output is correct
4 Correct 98 ms 852 KB Output is correct
5 Correct 99 ms 768 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 11 ms 744 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 110 ms 3924 KB Output is correct
10 Correct 106 ms 5056 KB Output is correct
11 Correct 179 ms 5548 KB Output is correct
12 Correct 206 ms 5552 KB Output is correct
13 Correct 178 ms 5572 KB Output is correct
14 Correct 165 ms 5716 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 788 KB Output is correct
2 Correct 25 ms 728 KB Output is correct
3 Correct 122 ms 3600 KB Output is correct
4 Correct 13 ms 728 KB Output is correct
5 Correct 136 ms 4340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 87 ms 3824 KB Output is correct
9 Correct 108 ms 4800 KB Output is correct
10 Correct 138 ms 5208 KB Output is correct
11 Correct 122 ms 5188 KB Output is correct
12 Correct 145 ms 5040 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 332 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 1 ms 336 KB Output is correct
19 Correct 137 ms 5464 KB Output is correct
20 Correct 138 ms 5296 KB Output is correct
21 Correct 154 ms 5352 KB Output is correct
22 Correct 135 ms 5312 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 772 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 113 ms 776 KB Output is correct
4 Correct 103 ms 780 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 4 ms 724 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 88 ms 776 KB Output is correct
11 Correct 107 ms 780 KB Output is correct
12 Correct 100 ms 724 KB Output is correct
13 Correct 46 ms 764 KB Output is correct
14 Correct 96 ms 736 KB Output is correct
15 Correct 100 ms 796 KB Output is correct
16 Correct 80 ms 808 KB Output is correct
17 Correct 217 ms 4404 KB Output is correct
18 Correct 247 ms 4376 KB Output is correct
19 Correct 217 ms 4400 KB Output is correct
20 Correct 98 ms 852 KB Output is correct
21 Correct 99 ms 768 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 11 ms 744 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 110 ms 3924 KB Output is correct
26 Correct 106 ms 5056 KB Output is correct
27 Correct 179 ms 5548 KB Output is correct
28 Correct 206 ms 5552 KB Output is correct
29 Correct 178 ms 5572 KB Output is correct
30 Correct 165 ms 5716 KB Output is correct
31 Correct 53 ms 788 KB Output is correct
32 Correct 25 ms 728 KB Output is correct
33 Correct 122 ms 3600 KB Output is correct
34 Correct 13 ms 728 KB Output is correct
35 Correct 136 ms 4340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 87 ms 3824 KB Output is correct
39 Correct 108 ms 4800 KB Output is correct
40 Correct 138 ms 5208 KB Output is correct
41 Correct 122 ms 5188 KB Output is correct
42 Correct 145 ms 5040 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 332 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 1 ms 336 KB Output is correct
49 Correct 137 ms 5464 KB Output is correct
50 Correct 138 ms 5296 KB Output is correct
51 Correct 154 ms 5352 KB Output is correct
52 Correct 135 ms 5312 KB Output is correct
53 Correct 205 ms 5316 KB Output is correct
54 Correct 222 ms 5308 KB Output is correct
55 Correct 231 ms 5300 KB Output is correct
56 Correct 116 ms 804 KB Output is correct
57 Correct 98 ms 724 KB Output is correct
58 Correct 146 ms 4168 KB Output is correct
59 Correct 167 ms 4164 KB Output is correct
60 Correct 232 ms 4140 KB Output is correct
61 Correct 141 ms 4096 KB Output is correct
62 Correct 174 ms 4180 KB Output is correct
63 Correct 214 ms 4156 KB Output is correct
64 Correct 157 ms 4552 KB Output is correct
65 Correct 183 ms 4540 KB Output is correct
66 Correct 203 ms 4484 KB Output is correct
67 Correct 29 ms 5048 KB Output is correct
68 Correct 128 ms 5016 KB Output is correct
69 Correct 110 ms 5064 KB Output is correct
70 Correct 186 ms 5460 KB Output is correct
71 Correct 220 ms 5428 KB Output is correct
72 Correct 196 ms 5424 KB Output is correct
73 Correct 194 ms 5552 KB Output is correct
74 Correct 189 ms 5476 KB Output is correct