oj.uz

Submission #1108372

# Submission time Handle Problem Language Result Execution time Memory
1108372 2024-11-04T02:03:02 Z 8pete8 Harvest (JOI20_harvest) C++17
100 / 100
 536 ms 175560 KB 
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mod=998244353,mxn=4e5+5,inf=1e18,minf=-1e18,lg=30;
//#undef int
int n,k,m,q,c,l;
void setIO(string name){		
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);
}
int pos[mxn+10],post[mxn+10],pref[mxn+10];
int caldist(int from,int go){
    if(from>go)return from-go;
    return l-go+from;
}
vector<pii>adj[mxn+10];
void addedge(int x,int y,int z){
    adj[x].pb({y,z});
}
int on[mxn+10],vis[mxn+10],oncycle[mxn+10]; //on cycle
int dist[mxn+10],sz[mxn+10],tin[mxn+10],tout[mxn+10],who[mxn+10],where[mxn+10];
int compsz[mxn+10];
vector<int>cycle[mxn+10];
int T=n,cnt=0;
stack<int>st;
void getcycle(int cur){
    if(vis[cur])return;
    vis[cur]=on[cur]=1;
    st.push(cur);
    for(auto i:adj[cur]){
        if(on[i.f]){
            cnt++;
            cycle[cnt].pb(i.f),oncycle[i.f]=cnt;
            while(st.top()!=i.f)cycle[cnt].pb(st.top()),oncycle[st.top()]=cnt,st.pop();
            reverse(all(cycle[cnt]));
            compsz[cnt]=dist[cur]-dist[i.f]+i.s;
        }
        if(!vis[i.f]){
            dist[i.f]=dist[cur]+i.s;
            getcycle(i.f);
        }
    }
    //999653525
    //1000000000
    on[cur]=0;
    if(!st.empty())st.pop();
}

int curtime=0;
pii cant;
void getdist(int cur){
    sz[cur]=1;
    tin[cur]=++curtime;
    who[tin[cur]]=cur;
    for(auto i:adj[cur])if(cant.f!=cur||cant.s!=i.f){
        dist[i.f]=dist[cur]+i.s;
        getdist(i.f);
        sz[cur]+=sz[i.f];
    }
    tout[cur]=curtime;
}
vector<pii>qry[mxn+10];
int ans[mxn+10];
struct fen{
    int fwk[mxn+10],sz=0;
    vector<pii>keep;
    void update(int pos,int val){
        pos++;
        keep.pb({pos,val});
        for(int i=pos;i<=sz;i+=(i&-i))fwk[i]+=val;
    }
    int qry(int pos){
        int sum=0;
        pos++;
        pos=min(pos,sz);
        for(int i=pos;i>0;i-=(i&-i))sum+=fwk[i];
        return sum;
    }
    void re(){
        for(auto i:keep)for(int j=i.f;j<=sz;j+=(j&-j))fwk[j]-=i.s;
        keep.clear();
    }
}t,t2;
/*
sack
*/
vector<int>have[mxn+10];
vector<int>comp;
vector<pii>extra[mxn+10];
int cc=0;
void sack(int cur,int keep){
    //solving case where node is not on cycle
    int hvy=0;
    vis[cur]=1;
    for(auto i:adj[cur])if(cur!=cant.f||i.f!=cant.s){
        if(sz[i.f]>sz[hvy])hvy=i.f;
    }
    for(auto i:adj[cur])if((cur!=cant.f||i.f!=cant.s)&&i.f!=hvy)sack(i.f,0);
    if(hvy)sack(hvy,1);
    int x=0;
    for(auto i:adj[cur])if(cur!=cant.f||i.f!=cant.s){
        if(i.f!=hvy)for(int j=tin[i.f];j<=tout[i.f];j++)if(who[j]>n)t.update(where[who[j]],1);
        if(have[i.f].size()>have[cur].size())swap(have[cur],have[i.f]);
        for(auto j:have[i.f])have[cur].pb(j);
    }
    if(cur>n)t.update(where[cur],1),have[cur].pb(dist[cur]),sz[cur]=1;
    for(auto i:qry[cur]){
        auto it=upper_bound(all(comp),i.f+dist[cur])-comp.begin()-1;
        if(it)ans[i.s]=t.qry(it);
    }
    if(!keep)t.re();
}
/*
*/
int32_t main(){
    fastio
	cin>>n>>m>>l>>c;
	for(int i=1;i<=n;i++)cin>>pos[i];
	for(int i=1;i<=m;i++)cin>>post[i];
	int cur=1;
    k=c/l;
	c%=l;
	for(int i=n+1;i<=2*n;i++)pos[i]=pos[i-n]+l;
	for(int i=n+1;i<=2*n;i++){
		while(cur<=i&&pos[i]-pos[cur]>=c)cur++;
		addedge(cur-1-((cur-1>n)?n:0),i-n,pos[i]-pos[cur-1]+(k*l));
	}
    T=n;
    for(int i=1;i<=n;i++)if(!vis[i])getcycle(i);
    cur=1;
    for(int i=1;i<=m;i++){
        T++;
        while(cur<=n&&post[i]>pos[cur])cur++;
        pos[T]=post[i];
        if(cur==1)addedge(n,T,caldist(pos[T],pos[n]));
        else addedge(cur-1,T,caldist(pos[T],pos[cur-1]));
    }
    for(int i=1;i<=cnt;i++){
        cant={cycle[i].back(),cycle[i][0]};
        dist[cycle[i][0]]=0;
        getdist(cycle[i][0]);
    }
    for(int i=1;i<=T;i++)comp.pb(dist[i]),vis[i]=0;
    sort(all(comp));
    comp.erase(unique(all(comp)),comp.end());
    t.sz=comp.size();
    for(int i=n+1;i<=T;i++)where[i]=lb(all(comp),dist[i])-comp.begin();
    cin>>q;
    for(int i=0;i<q;i++){
        int v,t;cin>>v>>t;
        qry[v].pb({t,i});
    }
    for(int i=1;i<=cnt;i++){
        cc=i;
        cant={cycle[i].back(),cycle[i][0]};
        sack(cycle[i][0],0);
        t.re();
    }
    vector<pair<pii,int>>qry2;
    for(int i=1;i<=cnt;i++){
        int head=cycle[i][0];
        for(auto j:cycle[i])for(auto k:qry[j])qry2.pb({{k.f,j},k.s});
        sort(all(qry2));
        int sum=0;
        comp.clear();
        for(auto j:have[head])comp.pb(j%compsz[i]);
        for(auto j:qry2)comp.pb(j.f.f%compsz[i]);
        sort(all(have[head]));
        cur=0;
        /*
        for(auto j:qry2){
            comp.pb((j.f.f%compsz[i])-compsz[i]+dist[j.f.s]);
            comp.pb((j.f.f%compsz[i])-compsz[i]+dist[j.f.s]+compsz[i]);
        }*/
        sort(all(comp));
        comp.erase(unique(all(comp)),comp.end());
        t.sz=comp.size();
        for(auto j:qry2){
            while(cur<have[head].size()&&j.f.f>=have[head][cur]){
                t.update(lb(all(comp),have[head][cur]%compsz[i])-comp.begin(),1);
                sum+=(have[head][cur])/compsz[i];
                cur++;
            }
            ans[j.s]+=((j.f.f/compsz[i])*cur)-sum+t.qry(lb(all(comp),j.f.f%compsz[i])-comp.begin())-cur;
            int val=(j.f.f%compsz[i])-compsz[i]+dist[j.f.s];
            int pos=upper_bound(all(comp),val)-comp.begin()-1;
            if(pos>=0)ans[j.s]+=t.qry(pos);
            val+=compsz[i];
            pos=upper_bound(all(comp),val)-comp.begin()-1;
            if(pos>=0)ans[j.s]+=t.qry(pos)-t.qry(lb(all(comp),j.f.f%compsz[i])-comp.begin());
        }
        t.re();
        qry2.clear();
    }
    for(int i=0;i<q;i++)cout<<ans[i]<<"\n";
}
/*
create  weighted directed graph with cycle on top
a tree will attach to the first node that harvest it with cost of dist
tree will move along the graph. we just need to find how many times a tree passes a given node and time

for qry v,T;
if node v is not in the cycle we can just find the number of tree in the subtree where dist(tree,v)<=T
can use sack on this

else the node v is on the cycle on top
let sz=size of the cycle
we can compute the first node treei will reach in the cycle. let the node be sti
then the time left for tree to move is T-dist(sti,treei)-dist(sti,v) = xi
then we just need to find the sum of floor[xi/sz]?

floor[T-dist/sz]+1 counting the first visit
floor[t-dist/sz]= floor[T/sz]-floor[dist/sz] - (1 if T mod sz< dist mod sz)+1
=floor[T/sz]-floor[dist/sz] + (1 if T mod sz>=dist mod sz)
we can count number of dist mod sz <= T mod sz seperately


1030156923594683
5150784617973418
33230868503053


1 1 2 559424926
0
1
1
1 759338505386878650
*/

Compilation message

harvest.cpp:32:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
harvest.cpp:38:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   38 | void setIO(string name){
      |                       ^
harvest.cpp:44:28: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   44 | int caldist(int from,int go){
      |                            ^
harvest.cpp:49:31: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   49 | void addedge(int x,int y,int z){
      |                               ^
harvest.cpp:58:22: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   58 | void getcycle(int cur){
      |                      ^
harvest.cpp:83:21: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   83 | void getdist(int cur){
      |                     ^
harvest.cpp:99:32: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   99 |     void update(int pos,int val){
      |                                ^
harvest.cpp:104:20: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
  104 |     int qry(int pos){
      |                    ^
harvest.cpp:111:13: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
  111 |     void re(){
      |             ^
harvest.cpp:123:27: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
  123 | void sack(int cur,int keep){
      |                           ^
harvest.cpp: In function 'void sack(long long int, long long int)':
harvest.cpp:132:9: warning: unused variable 'x' [-Wunused-variable]
  132 |     int x=0;
      |         ^
harvest.cpp: At global scope:
harvest.cpp:147:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
  147 | int32_t main(){
      |              ^
harvest.cpp: In function 'int32_t main()':
harvest.cpp:211:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  211 |             while(cur<have[head].size()&&j.f.f>=have[head][cur]){
      |                   ~~~^~~~~~~~~~~~~~~~~~
harvest.cpp: In function 'void setIO(std::string)':
harvest.cpp:40:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
harvest.cpp:41:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 74660 KB Output is correct
2 Correct 14 ms 75088 KB Output is correct
3 Correct 15 ms 75344 KB Output is correct
4 Correct 14 ms 74964 KB Output is correct
5 Correct 15 ms 75476 KB Output is correct
6 Correct 14 ms 75648 KB Output is correct
7 Correct 14 ms 75344 KB Output is correct
8 Correct 14 ms 75088 KB Output is correct
9 Correct 19 ms 74856 KB Output is correct
10 Correct 15 ms 75088 KB Output is correct
11 Correct 15 ms 75088 KB Output is correct
12 Correct 17 ms 75772 KB Output is correct
13 Correct 18 ms 75856 KB Output is correct
14 Correct 17 ms 75344 KB Output is correct
15 Correct 16 ms 75344 KB Output is correct
16 Correct 16 ms 75344 KB Output is correct
17 Correct 15 ms 75244 KB Output is correct
18 Correct 15 ms 75344 KB Output is correct
19 Correct 15 ms 75344 KB Output is correct
20 Correct 15 ms 75600 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 172 ms 94148 KB Output is correct
2 Correct 164 ms 101272 KB Output is correct
3 Correct 152 ms 116156 KB Output is correct
4 Correct 222 ms 128580 KB Output is correct
5 Correct 179 ms 141240 KB Output is correct
6 Correct 198 ms 141276 KB Output is correct
7 Correct 188 ms 105656 KB Output is correct
8 Correct 121 ms 103096 KB Output is correct
9 Correct 305 ms 152500 KB Output is correct
10 Correct 284 ms 153396 KB Output is correct
11 Correct 356 ms 151472 KB Output is correct
12 Correct 413 ms 151360 KB Output is correct
13 Correct 380 ms 151472 KB Output is correct
14 Correct 284 ms 152236 KB Output is correct
15 Correct 253 ms 130356 KB Output is correct
16 Correct 166 ms 123196 KB Output is correct
17 Correct 150 ms 120840 KB Output is correct
18 Correct 89 ms 99884 KB Output is correct
19 Correct 97 ms 99972 KB Output is correct
20 Correct 163 ms 108216 KB Output is correct

Subtask #3
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 74660 KB Output is correct
2 Correct 14 ms 75088 KB Output is correct
3 Correct 15 ms 75344 KB Output is correct
4 Correct 14 ms 74964 KB Output is correct
5 Correct 15 ms 75476 KB Output is correct
6 Correct 14 ms 75648 KB Output is correct
7 Correct 14 ms 75344 KB Output is correct
8 Correct 14 ms 75088 KB Output is correct
9 Correct 19 ms 74856 KB Output is correct
10 Correct 15 ms 75088 KB Output is correct
11 Correct 15 ms 75088 KB Output is correct
12 Correct 17 ms 75772 KB Output is correct
13 Correct 18 ms 75856 KB Output is correct
14 Correct 17 ms 75344 KB Output is correct
15 Correct 16 ms 75344 KB Output is correct
16 Correct 16 ms 75344 KB Output is correct
17 Correct 15 ms 75244 KB Output is correct
18 Correct 15 ms 75344 KB Output is correct
19 Correct 15 ms 75344 KB Output is correct
20 Correct 15 ms 75600 KB Output is correct
21 Correct 172 ms 94148 KB Output is correct
22 Correct 164 ms 101272 KB Output is correct
23 Correct 152 ms 116156 KB Output is correct
24 Correct 222 ms 128580 KB Output is correct
25 Correct 179 ms 141240 KB Output is correct
26 Correct 198 ms 141276 KB Output is correct
27 Correct 188 ms 105656 KB Output is correct
28 Correct 121 ms 103096 KB Output is correct
29 Correct 305 ms 152500 KB Output is correct
30 Correct 284 ms 153396 KB Output is correct
31 Correct 356 ms 151472 KB Output is correct
32 Correct 413 ms 151360 KB Output is correct
33 Correct 380 ms 151472 KB Output is correct
34 Correct 284 ms 152236 KB Output is correct
35 Correct 253 ms 130356 KB Output is correct
36 Correct 166 ms 123196 KB Output is correct
37 Correct 150 ms 120840 KB Output is correct
38 Correct 89 ms 99884 KB Output is correct
39 Correct 97 ms 99972 KB Output is correct
40 Correct 163 ms 108216 KB Output is correct
41 Correct 359 ms 136632 KB Output is correct
42 Correct 211 ms 130480 KB Output is correct
43 Correct 158 ms 125252 KB Output is correct
44 Correct 300 ms 148904 KB Output is correct
45 Correct 292 ms 163760 KB Output is correct
46 Correct 306 ms 163000 KB Output is correct
47 Correct 305 ms 162572 KB Output is correct
48 Correct 278 ms 164788 KB Output is correct
49 Correct 253 ms 165860 KB Output is correct
50 Correct 255 ms 132404 KB Output is correct
51 Correct 252 ms 131632 KB Output is correct
52 Correct 436 ms 173624 KB Output is correct
53 Correct 445 ms 175560 KB Output is correct
54 Correct 466 ms 173708 KB Output is correct
55 Correct 536 ms 173212 KB Output is correct
56 Correct 333 ms 149184 KB Output is correct
57 Correct 316 ms 146360 KB Output is correct
58 Correct 370 ms 151368 KB Output is correct
59 Correct 253 ms 149672 KB Output is correct
60 Correct 251 ms 150192 KB Output is correct
61 Correct 260 ms 150848 KB Output is correct
62 Correct 449 ms 152916 KB Output is correct
63 Correct 193 ms 123356 KB Output is correct
64 Correct 189 ms 123472 KB Output is correct
65 Correct 190 ms 125092 KB Output is correct
66 Correct 189 ms 122944 KB Output is correct
67 Correct 163 ms 124096 KB Output is correct
68 Correct 192 ms 122556 KB Output is correct
69 Correct 336 ms 138676 KB Output is correct
70 Correct 284 ms 134964 KB Output is correct
71 Correct 311 ms 135852 KB Output is correct
72 Correct 304 ms 135496 KB Output is correct