Submission #945648

#	Time	Username	Problem	Language	Result	Execution time	Memory
945648		12345678	Examination (JOI19_examination)	C++17	100 / 100	670 ms	23024 KiB

examination

#include <bits/stdc++.h>

using namespace std;

const int nx=2e5+5;

struct node
{
    int x, y, z, i;
    bool operator<(const node &o) const
    {
        if (x==o.x&&y==o.y&&z==o.z) return i<o.i;
        if (x==o.x&&y==o.y) return z>o.z;
        if (x==o.x) return y>o.y;
        return x>o.x;
    }
} d[nx], tmp[nx];

struct fenwick
{
    int d[nx];
    void add(int i, int vl)
    {
        while (i<nx) d[i]+=vl, i+=(i&-i);
    }
    int query(int i)
    {
        int res=0;
        while (i>0) res+=d[i], i-=(i&-i);
        return res;
    }
} f;

int n, q, t, res[nx];
map<int, int> mp;

void solve(int l, int r)
{
    if (l==r) return;
    int md=(l+r)/2;
    solve(l, md);
    solve(md+1, r);
    int idx=l;
    //cout<<"here "<<l<<' '<<r<<'\n';
    //for (int i=l; i<=r; i++) cout<<"value "<<d[i].i<<' '<<d[i].x<<' '<<d[i].y<<' '<<d[i].z<<'\n';
    for (int i=l, j=md+1; idx<=r;)
    {
        if (j>r||(i<=md&&d[i].y>=d[j].y))
        {
            if (d[i].i==0) f.add(mp[d[i].z], 1);//cout<<"update "<<l<<' '<<r<<' '<<d[i].x<<' '<<d[i].y<<' '<<d[i].z<<' '<<mp[d[i].z]<<'\n', f.add(mp[d[i].z], 1);
            tmp[idx++]=d[i++];
        }
        else
        {
            if (d[j].i!=0) res[d[j].i]+=f.query(nx-1)-f.query(mp[d[j].z]-1);//cout<<"query "<<l<<' '<<r<<' '<<d[j].i<<' '<<mp[d[j].z]<<'\n', res[d[j].i]+=f.query(nx-1)-f.query(mp[d[j].z]-1);
            tmp[idx++]=d[j++];
        }
    }
    for (int i=l; i<=md; i++) if (d[i].i==0) f.add(mp[d[i].z], -1);
    for (int i=l; i<=r; i++) d[i]=tmp[i];
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>q;
    for (int i=1; i<=n; i++) cin>>d[i].x>>d[i].y, d[i].z=d[i].x+d[i].y, d[i].i=0;
    for (int i=n+1; i<=n+q; i++) cin>>d[i].x>>d[i].y>>d[i].z, d[i].i=i-n;
    sort(d+1, d+n+q+1);
    for (int i=1; i<=n+q; i++) mp[d[i].z]=0;
    for (auto &[x, y]:mp) y=++t;
    solve(1, n+q);
    for (int i=1; i<=q;i ++) cout<<res[i]<<'\n';
}

• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57