Submission #466371

#	Time	Username	Problem	Language	Result	Execution time	Memory
466371		NhatMinh0208	Olympic Bus (JOI20_ho_t4)	C++14	11 / 100	141 ms	262148 KiB

ho_t4

#ifndef CPL_TEMPLATE
#define CPL_TEMPLATE
/*
	Normie's Template v2.5
	Changes:
    Added warning against using pragmas on USACO.
*/
// Standard library in one include.
#include <bits/stdc++.h>
using namespace std;
 
// ordered_set library.
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set(el) tree<el,null_type,less<el>,rb_tree_tag,tree_order_statistics_node_update>
 
// AtCoder library. (Comment out these two lines if you're not submitting in AtCoder.) (Or if you want to use it in other judges, run expander.py first.)
//#include <atcoder/all>
//using namespace atcoder;

//Pragmas (Comment out these three lines if you're submitting in szkopul or USACO.)
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast,unroll-loops,tree-vectorize")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
 
//File I/O.
#define FILE_IN "cseq.inp"
#define FILE_OUT "cseq.out"
#define ofile freopen(FILE_IN,"r",stdin);freopen(FILE_OUT,"w",stdout)
 
//Fast I/O.
#define fio ios::sync_with_stdio(0);cin.tie(0)
#define nfio cin.tie(0)
#define endl "\n"
 
//Order checking.
#define ord(a,b,c) ((a>=b)and(b>=c))
 
//min/max redefines, so i dont have to resolve annoying compile errors.
#define min(a,b) (((a)<(b))?(a):(b))
#define max(a,b) (((a)>(b))?(a):(b))

// Fast min/max assigns to use with AVX.
// Requires g++ 9.2.0.
template<typename T>
__attribute__((always_inline)) void chkmin(T& a, const T& b) {
    a=(a<b)?a:b;
}

template<typename T>
__attribute__((always_inline)) void chkmax(T& a, const T& b) {
    a=(a>b)?a:b;
}
 
//Constants.
#define MOD (ll(998244353))
#define MAX 300001
#define mag 320
const long double PI=3.14159265358979;
 
//Pairs and 3-pairs.
#define p1 first
#define p2 second.first
#define p3 second.second
#define fi first
#define se second
#define pii(element_type) pair<element_type,element_type>
#define piii(element_type) pair<element_type,pii(element_type)>
 
//Quick power of 2.
#define pow2(x) (ll(1)<<x)
 
//Short for-loops.
#define ff(i,__,___) for(int i=__;i<=___;i++)
#define rr(i,__,___) for(int i=__;i>=___;i--)
 
//Typedefs.
#define bi BigInt
typedef long long ll;
typedef long double ld;
typedef short sh;

// Binpow and stuff
ll BOW(ll a, ll x, ll p)
{
	if (!x) return 1;
	ll res=BOW(a,x/2,p);
	res*=res;
	res%=p;
	if (x%2) res*=a;
	return res%p;
}
ll INV(ll a, ll p)
{
	return BOW(a,p-2,p);
}
//---------END-------//
#endif
vector<int> vec;
ll n,m,i,j,k,t,t1,u,v,a,b,c,res=1e18;
ll d1[201][201];
ll d2[201][201];
ll ind[201][201];
ll eu[50001];
ll ev[50001];
ll ec[50001];
ll ed[50001];
ll mark[50001];
void get(int u, int v)
{
    if (ind[u][v]) {
        vec.push_back(ind[u][v]);
        mark[ind[u][v]]=vec.size();
    }
    else
    {
        int j;
        for (j=1;j<=n;j++) if ((j-u)and(j-v)and(d1[u][j]+d1[j][v]==d1[u][v])) break;
        assert(j<=n);
        get(u,j);
        get(j,v);
    }
}
int main()
{
	fio;
    cin>>n>>m;
    for (i=1;i<=m;i++)
    {
        cin>>eu[i]>>ev[i]>>ec[i]>>ed[i];
    }
    for (i=1;i<=n;i++) for (j=1;j<=n;j++)
    {
        d1[i][j]=1e18;
    }
    for (i=1;i<=n;i++)
    {
        d1[i][i]=0;
    }
    for (i=1;i<=m;i++)
    {
        d1[eu[i]][ev[i]]=min(d1[eu[i]][ev[i]],ec[i]);
        if (d1[eu[i]][ev[i]]==ec[i])
        ind[eu[i]][ev[i]]=i;
    }
    for (k=1;k<=n;k++)
    for (i=1;i<=n;i++)
    for (j=1;j<=n;j++)
    {
        d1[i][j]=min(d1[i][j],d1[i][k]+d1[k][j]);
    }
    res=d1[1][n]+d1[n][1];
    res=min(res,1e18);

    

    u=1,v=n;
    for (i=1;i<=m;i++)
    {
        mark[i]=0;
    }
    vec.clear();
    if (d1[u][v]<1e18)
    {
    get(u,v);

    for (i=1;i<=n;i++) for (j=1;j<=n;j++)
    {
        d2[i][j]=1e18;
    }
    for (i=1;i<=n;i++) d2[i][i]=0;
    for (i=1;i<=m;i++) if (!mark[i])
    {
        d2[eu[i]][ev[i]]=min(d1[eu[i]][ev[i]],ec[i]);
    }
    for (k=1;k<=n;k++)
    for (i=1;i<=n;i++)
    for (j=1;j<=n;j++)
    {
        d2[i][j]=min(d2[i][j],d2[i][k]+d2[k][j]);
    }
    for (i=1;i<=m;i++) if (!mark[i]) 
    {
        ed[i]+=min(d1[u][v],d1[u][ev[i]]+ec[i]+d1[eu[i]][v]);
    }
    else
    {
        a=1e18;
        for (j=1;j<=mark[i];j++) for (k=mark[i];k<=vec.size();k++)
        {
            b=eu[vec[j-1]];
            c=ev[vec[k-1]];
            a=min(a,d1[u][b]+d2[b][c]+d1[c][v]);
        }
        ed[i]+=a;
    }
    }
    else
    {
    for (i=1;i<=m;i++)
    {
        ed[i]+=min(d1[u][v],d1[u][ev[i]]+ec[i]+d1[eu[i]][v]);
    }
    }


    u=n,v=1;
    for (i=1;i<=m;i++)
    {
        mark[i]=0;
    }
    vec.clear();

    if (d1[u][v]<1e18)
    {
    get(u,v);

    for (i=1;i<=n;i++) for (j=1;j<=n;j++)
    {
        d2[i][j]=1e18;
    }
    for (i=1;i<=n;i++) d2[i][i]=0;
    for (i=1;i<=m;i++) if (!mark[i])
    {
        d2[eu[i]][ev[i]]=min(d1[eu[i]][ev[i]],ec[i]);
    }
    for (k=1;k<=n;k++)
    for (i=1;i<=n;i++)
    for (j=1;j<=n;j++)
    {
        d2[i][j]=min(d2[i][j],d2[i][k]+d2[k][j]);
    }
    for (i=1;i<=m;i++) if (!mark[i]) 
    {
        ed[i]+=min(d1[u][v],d1[u][ev[i]]+ec[i]+d1[eu[i]][v]);
    }
    else
    {
        a=1e18;
        for (j=1;j<=mark[i];j++) for (k=mark[i];k<=vec.size();k++)
        {
            b=eu[vec[j-1]];
            c=ev[vec[k-1]];
            a=min(a,d1[u][b]+d2[b][c]+d1[c][v]);
        }
        ed[i]+=a;
    }
    }
    else
    {
    for (i=1;i<=m;i++)
    {
        ed[i]+=min(d1[u][v],d1[u][ev[i]]+ec[i]+d1[eu[i]][v]);
    }
    }
    for (i=1;i<=m;i++) res=min(res,ed[i]);
    if (res==1e18) cout<<-1 ; else cout<<res;
    cout<<endl;
}
// Normie28;

Compilation message (stderr)

ho_t4.cpp:23: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
   23 | #pragma comment(linker, "/stack:200000000")
      | 
ho_t4.cpp: In function 'int main()':
ho_t4.cpp:190:50: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  190 |         for (j=1;j<=mark[i];j++) for (k=mark[i];k<=vec.size();k++)
      |                                                 ~^~~~~~~~~~~~
ho_t4.cpp:241:50: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  241 |         for (j=1;j<=mark[i];j++) for (k=mark[i];k<=vec.size();k++)
      |                                                 ~^~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 11 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 63