oj.uz

Submission #546106

# Submission time Handle Problem Language Result Execution time Memory
546106 2022-04-06T11:37:26 Z leaked Reconstruction Project (JOI22_reconstruction) C++14
0 / 100
 1 ms 212 KB 
#include <bits/stdc++.h>

#define f first
#define s second
#define vec vector
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define pw(x) (1LL<<(x))
#define sz(x) (int)(x).size()
#define m_p make_pair
#define fast_prep ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef long double ld;
template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
const int N=501;
int p[N],sz[N];
void make(int v){
    p[v]=v;sz[v]=1;
}
int get(int v){
    return p[v]=(p[v]==v?v:get(p[v]));
}
bool mg(int a,int b){
    a=get(a),b=get(b);
    if(a==b) return 0;
    if(sz[a]<sz[b]) swap(a,b);
    p[b]=a;sz[a]+=sz[b];
    return 1;
}


signed main(){
    fast_prep;
    int n,m;
    cin>>n>>m;
    vec<array<int,3>> arr;
    for(int i=0;i<m;i++){
        int v,u,w;
        cin>>v>>u>>w;--v;--u;
        arr.pb({w,v,u});
    }
    sort(all(arr));
    vec<vec<array<int,3>>> lft(m+1);
    auto rgt=lft;
    /// let's try
    {
        vec<array<int,3>> cur;
        for(int i=m-1;i>=0;i--){
            for(int j=0;j<n;j++) make(j);
            cur.insert(cur.begin(),arr[i]);
            for(auto &z : cur){
                if(mg(z[1],z[2]))
                    rgt[i].pb(z);
            }
            cur=rgt[i];
        }
    }
    {
        vec<array<int,3>> cur;
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++) make(j);
            cur.insert(cur.begin(),arr[i]);
            for(auto &z : cur){
                if(mg(z[1],z[2]))
                    lft[i].pb(z);
            }
            cur=lft[i];
        }
    }
    vec<int> kek;
    for(auto &z : arr) kek.pb(z[0]);
    for(int i=1;i<m;i++)
        kek.pb((arr[i][0]+arr[i][1])/2);
    sort(all(kek));kek.erase(unique(all(kek)),kek.end());
    int j=0;
    vec<int> lower;
    vec<int> same;
    vec<ll> ans;
    arr.pb({(int)1e9,-1,-1});
    int q;
    cin>>q;

    vec<int> x(q);
    for(auto &z : x) cin>>z;
    kek=x;
    for(auto &z : kek){
        while(j+1<m && arr[j+1][0]<=z) ++j;
//        cout<<"HEY "<<z<<' '<<arr[j][0]<<' '<<arr[j+1][0]<<' '<<z<<endl;
        ///j and j+1
        int f=0,s=0;
        for(int i=0;i<n;i++) make(i);
        int rem=n-1;
        int lw=0;
        ll cur=0;
        int _sam=0;
        while(rem--){
            while(f!=sz(lft[j]) && get(lft[j][f][1])==get(lft[j][f][2])) ++f;
            while(s!=sz(rgt[j+1]) && get(rgt[j+1][s][1])==get(rgt[j+1][s][2])) ++s;
            if(s!=sz(rgt[j+1]) && (f==sz(lft[j]) || (z-lft[j][f][0])>(rgt[j+1][s][0]-z))){
                mg(rgt[j+1][s][1],rgt[j+1][s][2]);
                cur+=rgt[j+1][s][0]-z;
                ++s;
            }
            else{
                assert(f!=sz(lft[j]));
//                cout<<"H
                mg(lft[j][f][1],lft[j][f][2]);
                cur+=z-lft[j][f][0];
                lw+=(z>lft[j][f][0]);
                _sam+=(z==lft[j][f][0]);
                ++f;
            }
        }
//        cout<<"WOW "<<z<<' '<<cur<<' '<<lw<<endl;
        lower.pb(lw);
        same.pb(_sam);
        ans.pb(cur);
    }
//    int q;
//    cin>>q;
    for(int i=0;i<q;i++){
        int xt=x[i];
//        cin>>x;
        ll anst=1e18;

        int j=upper_bound(all(kek),xt)-kek.begin();
//        if(j!=sz(kek)){
//            umin(anst,ans[j]-1ll*lower[j]*(kek[j]-xt)+1ll*(n-1-lower[j])*(kek[j]-xt));
//        }
        --j;
        if(j>=0) umin(anst,ans[j]);
        cout<<anst<<'\n';
    }
    return 0;
}
/*
5 10
1 2 8
1 3 13
1 4 5
1 5 11
1 5 3
2 3 7
2 4 15
3 4 6
3 5 6
4 5 2
1
10
17
*/

Subtask #1
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -