Cod sursa(job #1002831)

Utilizator dariusdariusMarian Darius dariusdarius Data 28 septembrie 2013 21:48:32
Problema Zoo Scor 60
Compilator cpp Status done
Runda Arhiva de probleme Marime 2.51 kb
#include<vector>
#include<set>
#include<cassert>
#include<map>
#include<cstdio>
#include<algorithm>
using namespace std;
struct MyQuery {int x1,y1,x2,y2,ans;} q[100005];
struct Solvable_query {int x,y,ind;bool type,semn;} v[416005];
int aib[500005];
void update(int x,int n)
{
    for(int i=x;i<=n;i+=(i&(-i)))
        aib[i]++;
}
int query(int x)
{
    int ans=0;
    for(int i=x;i;i-=(i&(-i)))
        ans+=aib[i];
    return ans;
}
class cmp
{
    public: inline bool operator()(const Solvable_query &a,const Solvable_query &b)
    {
        if(a.x==b.x)
            return a.type<b.type;
        return a.x<b.x;
    }
};
set<int> S;
const int hmod=63013;
vector< pair<int,int> > H[hmod];
void insert(int x,int y)
{
    H[(x>0?x:-x)%hmod].push_back(make_pair(x,y));
}
int FIND(int x)
{
    int h=(x>0?x:-x)%hmod;
    for(vector< pair<int,int> >::iterator it=H[h].begin();it!=H[h].end();it++)
        if(it->first==x)
            return it->second;
    assert(false);
    return -1;
}
int normalize(int n)
{
    int ans=0,ind=0;
    for(int i=1;i<=n;i++)
        S.insert(v[i].y);
    for(set<int>::iterator it=S.begin();it!=S.end();it++)
        insert(*it,++ind);
    for(int i=1;i<=n;i++)
    {
        v[i].y=FIND(v[i].y);
        ans=max(ans,v[i].y);
    }
    return ans;
}
char buf[7000000];int crs=0,sz=7000000;
void getInt(int &n)
{
    n=0;
    while(crs<sz && buf[crs]!='-' && !('0'<=buf[crs] && buf[crs]<='9')) crs++;
    int semn=1;
    if(buf[crs]=='-') semn=-1,crs++;
    while(crs<sz && ('0'<=buf[crs] && buf[crs]<='9')) {n=n*10+buf[crs]-'0';crs++;}
    n*=semn;
}
int main()
{
    freopen("zoo.in","r",stdin);
    freopen("zoo.out","w",stdout);
    int N,n,m;
    fread(buf,1,sz,stdin);
    getInt(n);N=n;
    for(int i=1;i<=n;i++)
        {getInt(v[i].x);getInt(v[i].y);v[i].type=0;}
    getInt(m);
    for(int i=1;i<=m;i++)
    {
        getInt(q[i].x1);
        getInt(q[i].y1);
        getInt(q[i].x2);
        getInt(q[i].y2);
        v[++N].x=q[i].x2;v[N].y=q[i].y2;v[N].type=1;v[N].ind=i;v[N].semn=true;
        v[++N].x=q[i].x2;v[N].y=q[i].y1-1;v[N].type=1;v[N].ind=i;v[N].semn=false;
        v[++N].x=q[i].x1-1;v[N].y=q[i].y2;v[N].type=1;v[N].ind=i;v[N].semn=false;
        v[++N].x=q[i].x1-1;v[N].y=q[i].y1-1;v[N].type=1;v[N].ind=i;v[N].semn=true;
    }
    int MAX=normalize(N);
    sort(v+1,v+N+1,cmp());
    for(int i=1;i<=N;i++)
        if(v[i].type==false)
            update(v[i].y,MAX);
        else
            q[v[i].ind].ans+=(v[i].semn?1:-1)*query(v[i].y);
    for(int i=1;i<=m;i++)
        printf("%d\n",q[i].ans);
    return 0;
}