Submission #915461

#	Time	Username	Problem	Language	Result	Execution time	Memory
915461		guagua0407	Minerals (JOI19_minerals)	C++17	70 / 100	21 ms	2920 KiB

minerals

#include "minerals.h"
#include<bits/stdc++.h>
using namespace std;
#define f first
#define s second

vector<int> a;
vector<pair<int,int>> vec;

void go(int l,int r,vector<int> &b,int id){
    if(l==r){
        Query(a[l]);
        assert((int)b.size()==1);
        vec.push_back({a[l],b[0]});
        return;
    }
    int mid=(l+r)/2;
    int cur=0;
    for(int i=mid+1;i<=r;i++){
        cur=Query(a[i]);
    }
    vector<int> ls,rs;
    for(auto v:b){
        int x=Query(v);
        if(id==0 or id==1){
            if(x!=cur){
                ls.push_back(v);
            }
            else{
                rs.push_back(v);
            }
        }
        else{
            if(x==cur){
                ls.push_back(v);
            }
            else{
                rs.push_back(v);
            }
        }
        cur=x;
    }
    vector<int>().swap(b);
    if(id==0){
        go(l,mid,ls,1);
        go(mid+1,r,rs,3);
    }
    else if(id==1){
        go(l,mid,ls,0);
        go(mid+1,r,rs,2);
    }
    else if(id==2){
        go(l,mid,ls,3);
        go(mid+1,r,rs,1);
    }
    else{
        go(l,mid,ls,2);
        go(mid+1,r,rs,0);
    }
}

void Solve(int n){
    vector<bool> ok(2*n+1);
    int prv=0;
    for(int i=1;i<=2*n;i++){
        int x=Query(i);
        if(x==prv+1){
            ok[i]=true;
        }
        prv=x;
    }
    vector<int> b;
    for(int i=1;i<=2*n;i++){
        if(ok[i]) a.push_back(i);
        else b.push_back(i);
    }
    go(0,n-1,b,3);
    for(auto v:vec){
        Answer(v.f,v.s);
    }
}

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 30 / 30
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10