Submission #377260

#	Time	Username	Problem	Language	Result	Execution time	Memory
377260		eulerdesoja	Examination (JOI19_examination)	C++14	0 / 100	3053 ms	20336 KiB

examination

#include<bits/stdc++.h>
#include<fstream>
using namespace std;

#define ll long long
#define pb push_back
#define sz(x) int(x.size())

typedef pair<int,int>ii;
typedef vector<int> vi;

const int mxn=1e5+5;
int n,q,a[mxn],b[mxn],ans[mxn],arr[mxn];
map<int,int>mp;
int bit[2][5*mxn];

struct t{
    int x,y,z,id;
};
vector<t>aux;

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

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

int32_t main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    //setIO("sort");
    cin>>n>>q;
    for(int i=0;i<n;i++){
        cin>>a[i]>>b[i];
        mp[a[i]];
        mp[b[i]];
    }
    for(int i=0;i<q;i++){
        int x,y,z;cin>>x>>y>>z;
        aux.pb({x,y,z,i});
        mp[x];mp[y];
    }

    int T=0;
    for(auto it=mp.begin();it!=mp.end();it++){
        T++;
        it->second=T;
    }
    for(int i=0;i<n;i++)arr[i]=i;
    sort(arr,arr+n,[](int x,int y){return a[x]+b[x]<a[y]+b[y];});
    
    sort(aux.begin(),aux.end(),[](t a,t b){return max(a.x+a.y,a.z)<max(b.x+b.y,b.z);});

    for(int tmp=0;tmp<n;tmp++){
        int i=arr[tmp];
        upd(0,mp[a[i]],1);
        upd(1,mp[b[i]],1);

    }
    int i=0;
    for(int j=0;j<q;j++){
        while(a[arr[i]]+b[arr[i]]<max(aux[j].x+aux[j].y,aux[j].z)){
            upd(0,mp[a[arr[i]]],-1);
            upd(1,mp[b[arr[i]]],-1);
            i++;
        }
        int sub=0;
        sub+=query(0,mp[aux[j].x]-1);
        sub+=query(1,mp[aux[j].y]-1);
        ans[aux[j].id]=n-i-sub;
    }
    for(int i=0;i<q;i++)cout<<ans[i]<<"\n";



    return 0;

}

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