Submission #739725

#	Time	Username	Problem	Language	Result	Execution time	Memory
739725		bgnbvnbv	Examination (JOI19_examination)	C++14	0 / 100	87 ms	12852 KiB

examination

#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<ll,ll>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=2e5;
const ll inf=1e18;
const ll mod=1e9+7;
ll n,q;
struct qq
{
    ll s,t;
    bool operator<(const qq&o)
    {
        return s>o.s;
    }
}x[maxN];
pli y[maxN],z[maxN];
ll bs(ll val)
{
    ll low=1,high=n;
    while(low<=high)
    {
        ll mid=low+high>>1;
        if(x[mid].s<=val) high=mid-1;
        else low=mid+1;
    }
    return low;
}
struct qqq
{
    ll c,l,r,id;
    bool operator<(const qqq&o)
    {
        return c<o.c;
    }
};
vector<qqq>q1,q2;
ll bit[maxN];
void update(ll i,ll v)
{
    while(i<=n)
    {
        bit[i]+=v;
        i+=i&(-i);
    }
}
ll get(ll l,ll r)
{
    l--;
    ll ans=0;
    while(r>0)
    {
        ans+=bit[r];
        r-=r&(-r);
    }
    while(l>0)
    {
        ans-=bit[l];
        l-=(l&(-l));
    }
    return ans;
}
ll ans[maxN];
void solve()
{
    cin >> n >> q;
    for(int i=1;i<=n;i++) cin >> x[i].s >> x[i].t;
    sort(x+1,x+n+1);
    for(int i=1;i<=n;i++)
    {
        y[i]={x[i].t,i};
        z[i]={x[i].t+x[i].s,i};
    }
    sort(y+1,y+n+1);
    sort(z+1,z+n+1);
    for(int i=1;i<=q;i++)
    {
        ll a,b,c;
        cin >> a >> b >> c;
        ll r=bs(a-1);
        r--;
        ll l=bs(c-b);
        if(l<=r)
        {
            q1.pb({c,l,r,i});
        }
        l--;
        l=min(l,r);
        if(1<=l)
        {
            q2.pb({b,1,l,i});
        }
    }
    sort(q1.begin(),q1.end());
    ll j=n;
    for(int i=(int)q1.size()-1;i>=0;i--)
    {
        while(j>0&&z[j].fi>=q1[i].c)
        {
            update(z[j].se,1);
            j--;
        }
        ans[q1[i].id]+=get(q1[i].l,q1[i].r);
    }
    for(int i=n;i>j;i--)
    {
        update(z[i].se,-1);
    }
    j=n;
    for(int i=(int)q2.size()-1;i>=0;i--)
    {
        while(j>0&&y[j].fi>=q2[i].c)
        {
            update(y[j].se,1);
            j--;
        }
        ans[q2[i].id]+=get(q2[i].l,q2[i].r);
    }
    for(int i=1;i<=q;i++) cout << ans[i] <<'\n';
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

Compilation message (stderr)

examination.cpp: In function 'll bs(ll)':
examination.cpp:28:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   28 |         ll mid=low+high>>1;
      |                ~~~^~~~~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 20
• Subtask 3: 0 / 21
• Subtask 4: 0 / 57