oj.uz

답안 #946724

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
946724 2024-03-15T00:52:21 Z guagua0407 수확 (JOI20_harvest) C++17
100 / 100
 413 ms 128892 KB 
//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

struct BIT{
    vector<int> bit;
    int n;
    BIT(int N){
        n=N;
        bit=vector<int>(n,0);
    }
    void update(int pos,int val){
        for(;pos<n;pos+=(pos&-pos)){
            bit[pos]+=val;
        }
    }
    int query(int pos){
        int ans=0;
        for(;pos>0;pos-=(pos&-pos)){
            ans+=bit[pos];
        }
        return ans;
    }
};

const int mxn=200000+5;
const int inf=1e18;
int a[mxn];
int b[mxn];
int nxt[mxn*2];
bool visited[mxn*2];
bool is_cycle[mxn*2];
vector<pair<int,ll>> adj[mxn*2];
int belong[mxn*2];
ll depth[mxn*2];
ll d[mxn*2];
ll sum[mxn*2];
int rev[mxn*2];
int st[mxn*2],en[mxn*2];
vector<pair<int,int>> sta;
vector<pair<int,int>> js[mxn];
vector<pair<pair<int,int>,int>> is[mxn];
vector<vector<ll>> pre;
int n,m,l,c;
int timer=0;

void dfs(int id,int p,int v){
    st[v]=++timer;
    if(v>=n){
        sta.push_back({depth[v]-pre[id][rev[p]],p});
    }
    for(auto u:adj[v]){
        if(is_cycle[u.f]) continue;
        depth[u.f]=depth[v]+u.s;
        dfs(id,p,u.f);
    }
    en[v]=timer;
}

signed main() {_
    cin>>n>>m>>l>>c;
    ll C=c;
    c%=l;
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    for(int i=0;i<m;i++){
        cin>>b[i];
    }
    for(int i=0;i<n;i++){
        int pos=upper_bound(a,a+n,(a[i]-c+l)%l)-a-1;
        if(pos==-1) pos=n-1;
        nxt[i]=pos;
        d[i]=((a[i]-c+l)%l-a[pos]+l)%l+C;
    }
    for(int i=0;i<m;i++){
        int pos=upper_bound(a,a+n,b[i])-a-1;
        if(pos==-1) pos=n-1;
        nxt[i+n]=pos;
        d[i+n]=(b[i]-a[pos]+l)%l;
    }
    for(int i=0;i<n+m;i++){
        adj[nxt[i]].push_back({i,d[i]});
    }
    vector<vector<int>> cycle;
    for(int i=0;i<n+m;i++){
        if(visited[i]) continue;
        int x=i;
        vector<int> tmp;
        while(!visited[x]){
            visited[x]=true;
            tmp.push_back(x);
            x=nxt[x];
        }
        bool ok=false;
        for(auto v:tmp){
            ok|=(v==x);
            is_cycle[v]=ok;
        }
        if(!ok) continue;
        vector<int> curcycle;
        for(auto v:tmp){
            if(is_cycle[v]){
                curcycle.push_back(v);
                belong[v]=(int)cycle.size();
            }
        }
        cycle.push_back(curcycle);
        vector<ll> dis;
        dis.push_back(0);
        for(int i=1;i<(int)curcycle.size();i++){
            dis.push_back(dis.back()+d[curcycle[i-1]]);
        }
        pre.push_back(dis);
        for(int i=0;i<(int)curcycle.size();i++){
            rev[curcycle[i]]=i;
        }
    }
    for(int i=0;i<(int)cycle.size();i++){
        int cnt=0;
        for(auto v:cycle[i]){
            sta.clear();
            dfs(i,v,v);
            js[i].insert(js[i].end(),all(sta));
            sum[i]+=d[v];
        }
    }
    int q;
    cin>>q;
    vector<pair<ll,pair<int,int>>> qys;
    vector<int> res(q);
    for(int i=0;i<q;i++){
        int v;
        ll t;
        cin>>v>>t;
        v--;
        if(!is_cycle[v]){
            qys.push_back({t+depth[v],{i,v}});
            continue;
        }
        int id=belong[v];
        is[id].push_back({{t-pre[id][rev[v]],v},i});
    }
    // tree
    {
        for(int i=n;i<n+m;i++){
            qys.push_back({depth[i],{-1,i}});
        }
        sort(qys.begin(),qys.end());
        BIT T(mxn*2);
        for(auto query:qys){
            int id=query.s.f;
            int v=query.s.s;
            if(id==-1){
                T.update(st[v],1);
            }
            else{
                res[id]=T.query(en[v])-T.query(st[v]);
            }
        }
    }
    // cycle
    for(int t=0;t<(int)cycle.size();t++){
        {
            vector<pair<pair<int,int>,int>> vec;
            vector<int> xs;
            xs.push_back(-inf);
            for(auto v:is[t]){
                int a=v.f.f/sum[t];
                assert(sum[t]!=0);
                if(a*sum[t]>v.f.f) a--;
                int b=v.f.f-a*sum[t];
                xs.push_back(b);
                vec.push_back({{a,v.s},b});
            }
            for(auto v:js[t]){
                int a=v.f/sum[t];
                assert(sum[t]!=0);
                if(a*sum[t]>v.f) a--;
                int b=v.f-a*sum[t];
                xs.push_back(b);
                vec.push_back({{a,-1},b});
            }
            sort(all(xs));
            xs.resize(unique(all(xs))-xs.begin());
            sort(all(vec));
            int sum2=0;
            int cnt=0;
            BIT T(xs.size());
            for(auto v:vec){
                int pos=lower_bound(all(xs),v.s)-xs.begin();
                if(v.f.s==-1){
                    sum2+=v.f.f;
                    cnt++;
                    T.update(pos,1);
                }
                else{
                    int i=v.f.s;
                    res[i]+=cnt*v.f.f;
                    res[i]-=sum2;
                    res[i]+=T.query(pos);
                }
            }
        }
        {
            vector<pair<pair<int,int>,int>> vec;
            vector<int> xs;
            xs.push_back(-inf);
            for(auto v:is[t]){
                xs.push_back(v.f.f);
                vec.push_back({{rev[v.f.s],v.s},v.f.f});
            }
            for(auto v:js[t]){
                xs.push_back(v.f);
                vec.push_back({{rev[v.s],-1},v.f});
            }
            sort(all(xs));
            xs.resize(unique(all(xs))-xs.begin());
            sort(all(vec));
            reverse(all(vec));
            BIT T(xs.size());
            for(auto v:vec){
                int pos=lower_bound(all(xs),v.s)-xs.begin();
                if(v.f.s==-1){
                    T.update(pos,1);
                }
                else{
                    int i=v.f.s;
                    res[i]-=T.query(pos);
                }
            }
        }
    }
    for(int i=0;i<q;i++){
        cout<<res[i]<<'\n';
    }
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz
/*
1 1 2 5
0
1
10
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
*/

Compilation message

harvest.cpp: In function 'int main()':
harvest.cpp:135:13: warning: unused variable 'cnt' [-Wunused-variable]
  135 |         int cnt=0;
      |             ^~~
harvest.cpp: In function 'void setIO(std::string)':
harvest.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
harvest.cpp:17:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 40796 KB Output is correct
2 Correct 11 ms 41696 KB Output is correct
3 Correct 12 ms 41564 KB Output is correct
4 Correct 11 ms 41268 KB Output is correct
5 Correct 11 ms 41512 KB Output is correct
6 Correct 11 ms 41768 KB Output is correct
7 Correct 11 ms 41764 KB Output is correct
8 Correct 10 ms 41256 KB Output is correct
9 Correct 11 ms 41252 KB Output is correct
10 Correct 11 ms 41256 KB Output is correct
11 Correct 11 ms 41252 KB Output is correct
12 Correct 12 ms 41308 KB Output is correct
13 Correct 12 ms 41308 KB Output is correct
14 Correct 11 ms 41308 KB Output is correct
15 Correct 13 ms 41512 KB Output is correct
16 Correct 11 ms 41568 KB Output is correct
17 Correct 11 ms 41512 KB Output is correct
18 Correct 11 ms 41512 KB Output is correct
19 Correct 11 ms 41512 KB Output is correct
20 Correct 10 ms 41508 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 196 ms 61020 KB Output is correct
2 Correct 141 ms 70480 KB Output is correct
3 Correct 261 ms 94296 KB Output is correct
4 Correct 282 ms 101604 KB Output is correct
5 Correct 133 ms 87432 KB Output is correct
6 Correct 135 ms 86964 KB Output is correct
7 Correct 112 ms 64408 KB Output is correct
8 Correct 115 ms 65020 KB Output is correct
9 Correct 246 ms 82032 KB Output is correct
10 Correct 233 ms 83196 KB Output is correct
11 Correct 261 ms 80624 KB Output is correct
12 Correct 267 ms 83108 KB Output is correct
13 Correct 266 ms 82952 KB Output is correct
14 Correct 256 ms 82224 KB Output is correct
15 Correct 229 ms 75428 KB Output is correct
16 Correct 156 ms 77656 KB Output is correct
17 Correct 132 ms 76684 KB Output is correct
18 Correct 90 ms 56864 KB Output is correct
19 Correct 92 ms 57988 KB Output is correct
20 Correct 123 ms 69764 KB Output is correct

Subtask #3
75.0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 40796 KB Output is correct
2 Correct 11 ms 41696 KB Output is correct
3 Correct 12 ms 41564 KB Output is correct
4 Correct 11 ms 41268 KB Output is correct
5 Correct 11 ms 41512 KB Output is correct
6 Correct 11 ms 41768 KB Output is correct
7 Correct 11 ms 41764 KB Output is correct
8 Correct 10 ms 41256 KB Output is correct
9 Correct 11 ms 41252 KB Output is correct
10 Correct 11 ms 41256 KB Output is correct
11 Correct 11 ms 41252 KB Output is correct
12 Correct 12 ms 41308 KB Output is correct
13 Correct 12 ms 41308 KB Output is correct
14 Correct 11 ms 41308 KB Output is correct
15 Correct 13 ms 41512 KB Output is correct
16 Correct 11 ms 41568 KB Output is correct
17 Correct 11 ms 41512 KB Output is correct
18 Correct 11 ms 41512 KB Output is correct
19 Correct 11 ms 41512 KB Output is correct
20 Correct 10 ms 41508 KB Output is correct
21 Correct 196 ms 61020 KB Output is correct
22 Correct 141 ms 70480 KB Output is correct
23 Correct 261 ms 94296 KB Output is correct
24 Correct 282 ms 101604 KB Output is correct
25 Correct 133 ms 87432 KB Output is correct
26 Correct 135 ms 86964 KB Output is correct
27 Correct 112 ms 64408 KB Output is correct
28 Correct 115 ms 65020 KB Output is correct
29 Correct 246 ms 82032 KB Output is correct
30 Correct 233 ms 83196 KB Output is correct
31 Correct 261 ms 80624 KB Output is correct
32 Correct 267 ms 83108 KB Output is correct
33 Correct 266 ms 82952 KB Output is correct
34 Correct 256 ms 82224 KB Output is correct
35 Correct 229 ms 75428 KB Output is correct
36 Correct 156 ms 77656 KB Output is correct
37 Correct 132 ms 76684 KB Output is correct
38 Correct 90 ms 56864 KB Output is correct
39 Correct 92 ms 57988 KB Output is correct
40 Correct 123 ms 69764 KB Output is correct
41 Correct 298 ms 95996 KB Output is correct
42 Correct 339 ms 111332 KB Output is correct
43 Correct 282 ms 102780 KB Output is correct
44 Correct 371 ms 128892 KB Output is correct
45 Correct 250 ms 114776 KB Output is correct
46 Correct 257 ms 116720 KB Output is correct
47 Correct 261 ms 117020 KB Output is correct
48 Correct 254 ms 116252 KB Output is correct
49 Correct 246 ms 116816 KB Output is correct
50 Correct 222 ms 93844 KB Output is correct
51 Correct 232 ms 93928 KB Output is correct
52 Correct 413 ms 109288 KB Output is correct
53 Correct 413 ms 112164 KB Output is correct
54 Correct 401 ms 108612 KB Output is correct
55 Correct 411 ms 107000 KB Output is correct
56 Correct 335 ms 107376 KB Output is correct
57 Correct 307 ms 102260 KB Output is correct
58 Correct 304 ms 109348 KB Output is correct
59 Correct 263 ms 107516 KB Output is correct
60 Correct 260 ms 108224 KB Output is correct
61 Correct 256 ms 106904 KB Output is correct
62 Correct 385 ms 97564 KB Output is correct
63 Correct 192 ms 86224 KB Output is correct
64 Correct 194 ms 87680 KB Output is correct
65 Correct 201 ms 88832 KB Output is correct
66 Correct 230 ms 86460 KB Output is correct
67 Correct 209 ms 89536 KB Output is correct
68 Correct 252 ms 85532 KB Output is correct
69 Correct 261 ms 95672 KB Output is correct
70 Correct 260 ms 91088 KB Output is correct
71 Correct 268 ms 94400 KB Output is correct
72 Correct 270 ms 98004 KB Output is correct