oj.uz

답안 #317258

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
317258 2020-10-29T08:08:18 Z zaneyu 꿈 (IOI13_dreaming) C++14
18 / 100
 95 ms 8828 KB 
/*input
12 8 2
0 8 4
8 2 2
2 7 4
5 11 3
5 1 7
1 3 1
1 9 5
10 6 3
*/
#include "dreaming.h"
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
 
#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
#define ll long long 
#define ld long double
#define pii pair<int,int>
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define MP make_pair
const ll INF64=4e12;
const int INF=0x3f3f3f3f;
const ll MOD=1e9+7;
const ld PI=acos(-1);
const ld eps=1e-9;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
ll mult(ll a,ll b){
    return ((a%MOD)*(b%MOD))%MOD;
}
ll mypow(ll a,ll b){
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1){
            res=(res*a)%MOD;
        }
        a=(a*a)%MOD;
        b>>=1;
    }
    return res;
}
const ll maxn=1e5+5;
const ll maxlg=__lg(maxn)+2;
vector<pii> v[maxn];
bool vis[maxn];
int bfs(int u,int dist[]){
    queue<int> q;
    q.push(u);
    dist[u]=0;
    int lst=-1;
    while(!q.empty()){
        int z=q.front();
        q.pop();
        lst=z;
        for(auto x:v[z]){
            if(dist[x.f]>dist[z]+x.s){
                dist[x.f]=dist[z]+x.s;
                q.push(x.f);
            }
        }
    }
    return lst;
}
int bfs(int u,int dist[],vector<int> &ppl){
    queue<int> q;
    q.push(u);
    dist[u]=0;
    int lst=-1;
    while(!q.empty()){
        int z=q.front();
        q.pop();
        ppl.pb(z);
        lst=z;
        for(auto x:v[z]){
            if(dist[x.f]>dist[z]+x.s){
                dist[x.f]=dist[z]+x.s;
                q.push(x.f);
            }
        }
    }
    return lst;
}
int da[maxn],db[maxn],dc[maxn],dd[maxn];
vector<int> ppl;
int travelTime(int n, int m, int l, int A[], int B[], int T[]) {
    REP(i,m){
        v[A[i]].pb({B[i],T[i]});
        v[B[i]].pb({A[i],T[i]});
    }
    vector<int> dst;
    REP(i,n) da[i]=db[i]=dc[i]=dd[i]=INF,vis[i]=0;
    REP(i,n){
        if(!vis[i]){
            int u=bfs(i,dc);
            int vv=bfs(u,da);
            ppl.clear();
            bfs(vv,db,ppl);
            int mn=INF;
            int z=0;
            for(auto x:ppl){
                vis[x]=1;
                if(da[x]+db[x]==da[vv]){
                    if(mn>max(da[x],db[x])){
                        mn=max(da[x],db[x]);
                        z=x;
                    }
                }
            }
            
            //cout<<mn<<'\n';
            //cout<<'\n';
            u=bfs(z,dd);
            dst.pb(dd[u]);
        }
    }
    sort(ALL(dst));
    reverse(ALL(dst));
    int mx=dst[0];
    if(sz(dst)>=2) MXTO(mx,dst[0]+dst[1]+l);
    if(sz(dst)>=3) MXTO(mx,dst[1]+dst[2]+2*l);
    return mx;
}

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 60 ms 8828 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 60 ms 8828 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 60 ms 8828 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 62 ms 7032 KB Output is correct
2 Correct 87 ms 7032 KB Output is correct
3 Correct 87 ms 7032 KB Output is correct
4 Correct 91 ms 7032 KB Output is correct
5 Correct 89 ms 6904 KB Output is correct
6 Correct 95 ms 7416 KB Output is correct
7 Correct 67 ms 7160 KB Output is correct
8 Correct 63 ms 6908 KB Output is correct
9 Correct 86 ms 7036 KB Output is correct
10 Correct 89 ms 7032 KB Output is correct
11 Correct 2 ms 2688 KB Output is correct
12 Correct 52 ms 4980 KB Output is correct
13 Correct 52 ms 4980 KB Output is correct
14 Correct 50 ms 4980 KB Output is correct
15 Correct 84 ms 4980 KB Output is correct
16 Correct 83 ms 4980 KB Output is correct
17 Correct 50 ms 4980 KB Output is correct
18 Correct 85 ms 5108 KB Output is correct
19 Correct 86 ms 5020 KB Output is correct
20 Correct 2 ms 2688 KB Output is correct
21 Correct 3 ms 2816 KB Output is correct
22 Correct 4 ms 2816 KB Output is correct
23 Correct 83 ms 4980 KB Output is correct

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 60 ms 8828 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 60 ms 8828 KB Output isn't correct
2 Halted 0 ms 0 KB -