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답안 #1106753

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1106753 2024-10-31T02:44:27 Z Bananabread 수확 (JOI20_harvest) C++17
20 / 100
 200 ms 79804 KB 
#include<bits/stdc++.h>
#define ll long long
#define ntr "\n"
#define mod (ll)(1e9+7)
#define taskname "temp"
#define frep freopen(taskname".inp","r",stdin); freopen(taskname".out","w",stdout);
using namespace std;
ll a[200001],b[200001];
ll n,m,l,c,q;
vector<pair<ll,ll>> adj[500001],adjrev[500001];
ll vis[500001];
ll dist[500001];
ll cnt;
vector<vector<pair<ll,ll>>> compart;
vector<vector<ll>> pref;
vector<ll> len;
ll num[500001];
ll insub[500001];
bool inloop[500001];
ll root;
void dfs(ll u){
    if(root) return ;
    if(vis[u]){
        root=u;
        return ;
    }
    vis[u]=1;
    for(auto [v,w]:adj[u]){
        dfs(v);
    }
}
void dfs1(ll u=root,ll d=0,ll par=0){
    vis[u]=1;
    num[u]=cnt;
    if(u>n){
        insub[u]=1;
        compart[cnt].push_back({d%len[cnt],d/len[cnt]});
    }
    for(auto [v,w]:adjrev[u]){
        if(v==root) continue;
        //cout<<u<<' '<<v<<' '<<root<<ntr;
        dfs1(v,d+w,u);
        insub[u]+=insub[v];
    }
}
int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    //frep;
    cin>>n>>m>>l>>c;
    for(int i=1;i<=n;i++) cin>>a[i];
    for(int i=1;i<=m;i++) cin>>b[i];
    for(int i=1;i<=n;i++){
        ll t=((a[i]-c)%l+l)%l;
        ll pos=upper_bound(a+1,a+n+1,t)-a-1;
        if(pos==0) pos=n;
        //if(i==j) continue;
        ll v=((a[i]-a[pos])%l+l)%l;
        ll cost=(c-v+l-1)/l*l+v;
//        cout<<i<<' '<<pos<<' '<<cost<<ntr;
        adj[i].push_back({pos,cost});
        adjrev[pos].push_back({i,cost});
    }
    for(int i=1;i<=m;i++){
        ll v=upper_bound(a+1,a+n+1,b[i])-a-1;
        if(v==0) v=n;
        ll cost=((b[i]-a[v])%l+l)%l;
        adj[i+n].push_back({v,cost});
        adjrev[v].push_back({i+n,cost});
//        cout<<i+n<<' '<<v<<' '<<cost<<ntr;
    }
    compart.push_back({});
    pref.push_back({});
    len.push_back(0);
    for(int i=1;i<=m;i++){
        if(vis[i+n]) continue;
        root=0,dfs(i+n);
        cnt++;
        compart.push_back({});
        pref.push_back({});
        ll p=root;
        dist[root]=0;
        while(true){
            inloop[p]=1;
            auto [v,w]=adj[p][0];
            if(v==root){
                len.push_back(dist[p]+w);
                break;
            }
            dist[v]=dist[p]+w;
            p=v;
        }
        dfs1();
        sort(compart[cnt].begin(),compart[cnt].end());
        pref[cnt].push_back(compart[cnt][0].second);
        for(int i=1;i<compart[cnt].size();i++){
            pref[cnt].push_back(pref[cnt].back()+compart[cnt][i].second);
        }
    }
//    for(int i=1;i<=n+m;i++){
//        cout<<insub[i]<<' ';
//    }
//    cout<<ntr;
    cin>>q;
    for(int i=1;i<=q;i++){
        ll u,t;
        cin>>u>>t;
        t-=dist[u];
        if(!inloop[u]){
            cout<<insub[u]<<ntr;
            continue;
        }
        else{
            ll ans=insub[u]*(dist[u]>0);
            ll p=t/len[num[u]];
            ll q=t%len[num[u]];
            ll lo=0,hi=compart[num[u]].size()-1,pos=-1;
            while(lo<=hi){
                ll mid=(lo+hi)/2;
                if(compart[num[u]][mid].first<=q) pos=mid,lo=mid+1;
                else hi=mid-1;
            }
            ans+=(compart[num[u]].size())*p-pref[num[u]].back();
            ans+=pos+1;
            cout<<ans<<ntr;
        }

    }
}

Compilation message

harvest.cpp: In function 'int main()':
harvest.cpp:95:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |         for(int i=1;i<compart[cnt].size();i++){
      |                     ~^~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 33360 KB Output is correct
2 Correct 7 ms 33872 KB Output is correct
3 Correct 7 ms 33616 KB Output is correct
4 Incorrect 7 ms 31924 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 63 ms 36936 KB Output is correct
2 Correct 107 ms 54628 KB Output is correct
3 Correct 86 ms 52040 KB Output is correct
4 Correct 118 ms 59464 KB Output is correct
5 Correct 123 ms 70728 KB Output is correct
6 Correct 112 ms 70936 KB Output is correct
7 Correct 80 ms 49344 KB Output is correct
8 Correct 85 ms 47032 KB Output is correct
9 Correct 136 ms 79804 KB Output is correct
10 Correct 120 ms 72776 KB Output is correct
11 Correct 185 ms 71752 KB Output is correct
12 Correct 200 ms 78672 KB Output is correct
13 Correct 197 ms 78664 KB Output is correct
14 Correct 148 ms 71752 KB Output is correct
15 Correct 120 ms 63356 KB Output is correct
16 Correct 104 ms 67912 KB Output is correct
17 Correct 104 ms 67664 KB Output is correct
18 Correct 60 ms 45504 KB Output is correct
19 Correct 59 ms 45704 KB Output is correct
20 Correct 95 ms 57388 KB Output is correct

Subtask #3
0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 33360 KB Output is correct
2 Correct 7 ms 33872 KB Output is correct
3 Correct 7 ms 33616 KB Output is correct
4 Incorrect 7 ms 31924 KB Output isn't correct
5 Halted 0 ms 0 KB -