Submission #1083441

#	Time	Username	Problem	Language	Result	Execution time	Memory
1083441		tosivanmak	Minerals (JOI19_minerals)	C++17	90 / 100	32 ms	2996 KiB

minerals

#include "minerals.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
 
mt19937 rng((ll)chrono::steady_clock::now().time_since_epoch().count());
random_device rd;
mt19937 g(rd());
ll rnd(ll u, ll v){
    return uniform_int_distribution<ll>(u,v)(rng);
}
int mp[86005];
bool used[86005];
int cnt=0;
int machine=0;
bool inside[86005];
map<ll,ll>hv;
int query_num=0;
 
ll fp[43005],sp[43005];
bool pref[86005];
ll timer=1,timer2=1;
void dc(ll l, ll r){
    if(l==r)return;
    ll mid=(l+r-1)>>1;
    ll last_qry;
    bool noonlef=0;
    for(int i=l;i<=mid;i++){
        last_qry=Query(fp[i]); pref[fp[i]]^=1;
        if(pref[fp[i]]==0)noonlef=1;
    }
    // cout<<"dc "<<l<<" "<<r<<" "<<noonlef<<'\n';
    vector<ll>lef,righ;
    ll brkid;
    for(int i=l;i<=r-1;i++){
        ll curq=Query(sp[i]);
        pref[sp[i]]^=1;
        bool remov=0;
        if(!pref[sp[i]])remov=1;
        if(remov){
            if(curq==last_qry){
                if(noonlef)righ.push_back(sp[i]);
                else lef.push_back(sp[i]);
            }
            else{
                if(noonlef)lef.push_back(sp[i]);
                else righ.push_back(sp[i]);
            }
        }
        else{
            if(curq==last_qry){
                if(noonlef)righ.push_back(sp[i]);
                else lef.push_back(sp[i]);
            }
            else{
                if(noonlef)lef.push_back(sp[i]);
                else righ.push_back(sp[i]);
            }
        }
        if(lef.size()==mid-l+1||righ.size()==r-(mid+1)+1){
            brkid=i; break;
        }
        last_qry=curq;
    }
    if(lef.size()!=mid-l+1){
        for(int i=brkid+1;i<=r;i++){
            lef.push_back(sp[i]);
        }
    }
    else{
        for(int i=brkid+1;i<=r;i++){
            righ.push_back(sp[i]);
        }
    }
    shuffle(lef.begin(),lef.end(),g);
    shuffle(righ.begin(),righ.end(),g);
    for(int i=0;i<lef.size();i++){
        sp[l+i]=lef[i];
    }
    for(int i=0;i<righ.size();i++){
        sp[mid+1+i]=righ[i];
    }
    dc(l,mid); dc(mid+1,r);
}
void Solve(int n){
    int prev=0;
    for(int i=1;i<=2*n;i++){
        int cur=Query(i);
        if(cur==prev+1){
            fp[timer++]=i;
        }
        else{
            sp[timer2++]=i;
        }
        prev=cur;
    }
    for(int i=1;i<=2*n;i++)pref[i]=1;
    dc(1,n);
    for(int i=1;i<=n;i++){
        Answer(fp[i],sp[i]);
    }
}

Compilation message (stderr)

minerals.cpp: In function 'void dc(long long int, long long int)':
minerals.cpp:60:22: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   60 |         if(lef.size()==mid-l+1||righ.size()==r-(mid+1)+1){
      |            ~~~~~~~~~~^~~~~~~~~
minerals.cpp:60:44: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   60 |         if(lef.size()==mid-l+1||righ.size()==r-(mid+1)+1){
      |                                 ~~~~~~~~~~~^~~~~~~~~~~~~
minerals.cpp:65:18: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   65 |     if(lef.size()!=mid-l+1){
      |        ~~~~~~~~~~^~~~~~~~~
minerals.cpp:77:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |     for(int i=0;i<lef.size();i++){
      |                 ~^~~~~~~~~~~
minerals.cpp:80:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |     for(int i=0;i<righ.size();i++){
      |                 ~^~~~~~~~~~~~
minerals.cpp:71:24: warning: 'brkid' may be used uninitialized in this function [-Wmaybe-uninitialized]
   71 |         for(int i=brkid+1;i<=r;i++){
      |                   ~~~~~^~
minerals.cpp:41:13: warning: 'last_qry' may be used uninitialized in this function [-Wmaybe-uninitialized]
   41 |             if(curq==last_qry){
      |             ^~

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