Submission #1187396

#TimeUsernameProblemLanguageResultExecution timeMemory
1187396guagua0407Dragon 2 (JOI17_dragon2)C++20
60 / 100
2869 ms7672 KiB
//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#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);
#define pll pair<ll,ll>

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);
}

pll operator-(pll a,pll b){
    return pll(a.f-b.f,a.s-b.s);
}

ll cross(pll a,pll b){
    return a.f*b.s-a.s*b.f;
}

int ori(pll a,pll b,pll c){
    ll res=cross(b-a,c-a);
    return (res==0?0:(res>0?1:-1));
}

bool comp(pair<pll,int> a,pair<pll,int> b){
    pll aa=a.f;
    pll bb=b.f;
    #define is_neg(x) (x.s<0 or (x.s==0 and x.f<0))
    int A=is_neg(aa);
    int B=is_neg(bb);
    if(A!=B) return A<B;
    return ori(pll(0,0),aa,bb)>0;
}

const int mxn=1e5+5;
const int BB=200;
int bit[mxn];

void upd(int pos,int val){
    pos++;
    for(;pos<mxn;pos+=(pos&-pos)){
        bit[pos]+=val;
    }
}

int query(int pos){
    pos++;
    int ans=0;
    for(;pos>0;pos-=(pos&-pos)){
        ans+=bit[pos];
    }
    return ans;
}

void update(int l,int r,int val){
    upd(l,val);
    upd(r+1,-val);
}

int main(){_
    int n,m;
    cin>>n>>m;
    vector<int> c(n);
    vector<pll> p(n);
    vector<int> sz(m);
    vector<vector<int>> id(m);
    for(int i=0;i<n;i++){
        cin>>p[i].f>>p[i].s>>c[i];
        c[i]--;
        id[c[i]].push_back(i);
    }
    for(int i=0;i<m;i++){
        sz[i]=(int)id[i].size();
    }
    pll A,B;
    cin>>A.f>>A.s>>B.f>>B.s;
    int q;
    cin>>q;
    vector<vector<int>> out(n);
    vector<vector<int>> in(n);
    vector<int> R1(n),R2(n);
    vector<int> rev(n);
    for(int a=0;a<m;a++){
        if(sz[a]<=BB) continue;
        vector<pair<pll,int>> vec;
        for(int i=0;i<n;i++){
            vec.push_back({p[i],i});
        }
        vector<int> ord1,ord2;
        {
            vector<pair<pll,int>> tmp;
            for(auto v:vec){
                tmp.push_back({v.f-A,v.s});
            }
            sort(all(tmp),comp);
            for(int i=0;i<(int)tmp.size();i++){
                ord1.push_back(tmp[i].s);
            }
        }
        {
            vector<pair<pll,int>> tmp;
            for(auto v:vec){
                tmp.push_back({v.f-B,v.s});
            }
            sort(all(tmp),comp);
            for(int i=0;i<(int)tmp.size();i++){
                ord2.push_back(tmp[i].s);
            }
        }
        int sz=(int)ord1.size();
        for(int i=0;i<sz;i++){
            rev[ord1[i]]=i;
        }
        ord1.insert(ord1.end(),all(ord1));
        ord2.insert(ord2.end(),all(ord2));
        {
            int r=0;
            for(int l=0;l<sz;l++){
                while(r<l+sz and ori(A,p[ord1[l]],p[ord1[r]])>=0) r++;
                R1[ord1[l]]=r;
            }
        }
        {
            int r=0;
            for(int l=0;l<sz;l++){
                while(r<l+sz and ori(B,p[ord2[l]],p[ord2[r]])>=0) r++;
                R2[ord2[l]]=r;
            }
        }
        vector<pair<pair<int,int>,pair<int,int>>> op;
        auto add=[&](int l1,int r1,int l2,int r2){
            if(l1>r1 or l2>r2) return;
            op.push_back({{l1,1},{l2,r2}});
            op.push_back({{r1+1,-1},{l2,r2}});
        };
        for(int l=0;l<sz;l++){
            if(c[ord2[l]]!=a) continue;
            if(ori(B,p[ord2[l]],A)>=0) add(l,R2[ord2[l]]-1,R1[ord2[l]],rev[ord2[l]]+sz-1);
            else add(R2[ord2[l]],l+sz-1,rev[ord2[l]],R1[ord2[l]]-1);
        }
        sort(all(op));
        vector<int> cnt(sz);
        int pos=0;
        for(int i=0;i<=2*sz;i++){
            while(pos<(int)op.size() and op[pos].f.f==i){
                update(op[pos].s.f,op[pos].s.s,op[pos].f.s);
                pos++;
            }
            if(i==2*sz) break;
            cnt[i%sz]+=query(rev[ord2[i]]%sz)+query(rev[ord2[i]]%sz+sz);
        }
        out[a]=vector<int>(m);
        for(int i=0;i<sz;i++){
            if(c[ord2[i]]==a) continue;
            out[a][c[ord2[i]]]+=cnt[i];
        }
    }
    for(int a=0;a<m;a++){
        if(sz[a]<=BB) continue;
        vector<pair<pll,int>> vec;
        for(int i=0;i<n;i++){
            vec.push_back({p[i],i});
        }
        vector<int> ord1,ord2;
        {
            vector<pair<pll,int>> tmp;
            for(auto v:vec){
                tmp.push_back({v.f-A,v.s});
            }
            sort(all(tmp),comp);
            for(int i=0;i<(int)tmp.size();i++){
                ord1.push_back(tmp[i].s);
            }
        }
        {
            vector<pair<pll,int>> tmp;
            for(auto v:vec){
                tmp.push_back({v.f-B,v.s});
            }
            sort(all(tmp),comp);
            for(int i=0;i<(int)tmp.size();i++){
                ord2.push_back(tmp[i].s);
            }
        }
        int sz=(int)ord1.size();
        for(int i=0;i<sz;i++){
            rev[ord1[i]]=i;
        }
        ord1.insert(ord1.end(),all(ord1));
        ord2.insert(ord2.end(),all(ord2));
        {
            int r=0;
            for(int l=0;l<sz;l++){
                while(r<l+sz and ori(A,p[ord1[l]],p[ord1[r]])>=0) r++;
                R1[ord1[l]]=r;
            }
        }
        {
            int r=0;
            for(int l=0;l<sz;l++){
                while(r<l+sz and ori(B,p[ord2[l]],p[ord2[r]])>=0) r++;
                R2[ord2[l]]=r;
            }
        }
        vector<pair<pair<int,int>,pair<int,int>>> op;
        auto add=[&](int l1,int r1,int l2,int r2){
            if(l1>r1 or l2>r2) return;
            op.push_back({{l1,1},{l2,r2}});
            op.push_back({{r1+1,-1},{l2,r2}});
        };
        for(int l=0;l<sz;l++){
            if(c[ord2[l]]!=a) continue;
            if(ori(B,p[ord2[l]],A)<=0) add(l,R2[ord2[l]]-1,R1[ord2[l]],rev[ord2[l]]+sz-1);
            else add(R2[ord2[l]],l+sz-1,rev[ord2[l]],R1[ord2[l]]-1);
            if(ori(B,p[ord2[l]],A)>=0){
                int r2=l;
                while(r2<R2[ord2[l]] and ori(B,p[ord2[r2]],A)>=0) r2++;
                int r1=R1[ord2[l]];
                while(r1<rev[ord2[l]]+sz and ori(A,p[ord1[r1]],B)>=0) r1++;
                add(r2,R2[ord2[l]]-1,R1[ord2[l]],r1-1);
            }
            else{
                int r2=R2[ord2[l]];
                while(r2<l+sz and ori(B,p[ord2[r2]],A)<=0) r2++;
                int r1=rev[ord2[l]];
                while(r1<R1[ord2[l]] and ori(A,p[ord1[r1]],B)>=0) r1++;
                add(r2,l+sz-1,rev[ord2[l]],r1);
            }
        }
        sort(all(op));
        vector<int> cnt(sz);
        int pos=0;
        for(int i=0;i<=2*sz;i++){
            while(pos<(int)op.size() and op[pos].f.f==i){
                update(op[pos].s.f,op[pos].s.s,op[pos].f.s);
                pos++;
            }
            if(i==2*sz) break;
            cnt[i%sz]+=query(rev[ord2[i]]%sz)+query(rev[ord2[i]]%sz+sz);
        }
        in[a]=vector<int>(m);
        for(int i=0;i<sz;i++){
            if(c[ord2[i]]==a) continue;
            in[a][c[ord2[i]]]+=cnt[i];
        }
    }
    auto solve=[&](int a,int b){
        vector<pair<pll,int>> vec;
        for(auto v:id[a]){
            vec.push_back({p[v],v});
        }
        for(auto v:id[b]){
            vec.push_back({p[v],v});
        }
        vector<int> ord1,ord2;
        {
            vector<pair<pll,int>> tmp;
            for(auto v:vec){
                tmp.push_back({v.f-A,v.s});
            }
            sort(all(tmp),comp);
            for(int i=0;i<(int)tmp.size();i++){
                ord1.push_back(tmp[i].s);
            }
        }
        {
            vector<pair<pll,int>> tmp;
            for(auto v:vec){
                tmp.push_back({v.f-B,v.s});
            }
            sort(all(tmp),comp);
            for(int i=0;i<(int)tmp.size();i++){
                ord2.push_back(tmp[i].s);
            }
        }
        int sz=(int)ord1.size();
        for(int i=0;i<sz;i++){
            rev[ord1[i]]=i;
        }
        ord1.insert(ord1.end(),all(ord1));
        ord2.insert(ord2.end(),all(ord2));
        {
            int r=0;
            for(int l=0;l<sz;l++){
                while(r<l+sz and ori(A,p[ord1[l]],p[ord1[r]])>=0) r++;
                R1[ord1[l]]=r;
            }
        }
        {
            int r=0;
            for(int l=0;l<sz;l++){
                while(r<l+sz and ori(B,p[ord2[l]],p[ord2[r]])>=0) r++;
                R2[ord2[l]]=r;
            }
        }
        vector<pair<pair<int,int>,pair<int,int>>> op;
        auto add=[&](int l1,int r1,int l2,int r2){
            if(l1>r1 or l2>r2) return;
            op.push_back({{l1,1},{l2,r2}});
            op.push_back({{r1+1,-1},{l2,r2}});
        };
        for(int l=0;l<sz;l++){
            if(c[ord2[l]]!=a) continue;
            if(ori(B,p[ord2[l]],A)>=0) add(l,R2[ord2[l]]-1,R1[ord2[l]],rev[ord2[l]]+sz-1);
            else add(R2[ord2[l]],l+sz-1,rev[ord2[l]],R1[ord2[l]]-1);
        }
        sort(all(op));
        vector<int> cnt(sz);
        int pos=0;
        for(int i=0;i<=2*sz;i++){
            while(pos<(int)op.size() and op[pos].f.f==i){
                update(op[pos].s.f,op[pos].s.s,op[pos].f.s);
                pos++;
            }
            if(i==2*sz) break;
            cnt[i%sz]+=query(rev[ord2[i]]%sz)+query(rev[ord2[i]]%sz+sz);
        }
        int ans=0;
        for(int i=0;i<sz;i++){
            if(c[ord2[i]]!=b) continue;
            ans+=cnt[i];
        }
        return ans;
    };
    for(int i=0;i<q;i++){
        int a,b;
        cin>>a>>b;
        a--;
        b--;
        if(sz[a]<=BB and sz[b]<=BB){
            cout<<solve(a,b)<<'\n';
        }
        else if(sz[a]>BB){
            cout<<out[a][b]<<'\n';
        }
        else{
            cout<<in[a][b]<<'\n';
        }
    }
    return 0;
}
//maybe its multiset not set
//yeeorz
//diaoborz

Compilation message (stderr)

dragon2.cpp: In function 'void setIO(std::string)':
dragon2.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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