Submission #907157

#	Time	Username	Problem	Language	Result	Execution time	Memory
907157		ibm2006	Minerals (JOI19_minerals)	C++17	70 / 100	30 ms	5688 KiB

minerals

#include "minerals.h"
#include<bits/stdc++.h>
using namespace std;
typedef int ll;
ll n,i,j,k,l,r,x,y,z,w,s,t,perm[1100000],b[1100000];
vector<ll> v,u;
void dnc(vector<ll> v,vector<ll> u,ll z)
{
    //printf("(%lld %lld)\n",v.size(),u.size());
    ll i,m=v.size();
    ll mid=m/2,x;
    if(m==1)
    {
        perm[v[0]]=u[0];
        return;
    }
    if(z==0)
    {for(i=0;i<mid;i++)
    {
        //printf("! %lld\n",v[i]);
        x=Query(v[i]);
        s++;
    }}
    else
    {
        for(i=mid;i<m;i++)
        {
            //printf("! %lld\n",v[i]);
            x=Query(v[i]);
            s--;
        }
    }
    vector<ll> v1,v2,u1,u2;
    for(i=0;i<mid;i++)
    {
        v1.push_back(v[i]);
    }
    for(i=mid;i<m;i++)
    {
        v2.push_back(v[i]);
    }
    x=s-x;
    for(i=0;i<m;i++)
    {
        //printf("! %lld\n",u[i]);
        y=Query(u[i]);
        if(b[u[i]]==0)
        s++;
        else
            s--;
        b[u[i]]^=1;
        y=s-y;
        //printf("(%lld)\n",y);
        if(y!=x)
            u1.push_back(u[i]);
        else
            u2.push_back(u[i]);
        //    printf("! %lld\n",u[i]);
        x=y;
    }
    dnc(v2,u2,0);
    dnc(v1,u1,1);
}
void f()
{
    ll i,x=0,y;
    for(i=1;i<=n*2;i++)
    {
        y=Query(i);
        s++;
        if(y>x)
        {
            v.push_back(i);
            x++;
            continue;
        }
        else
        {
            Query(i);
            s--;
            u.push_back(i);
            continue;
        }
    }
}
void Solve(ll N) {
   n=N;
   f();
   /*for(i=0;i<v.size();i++)
   {
       Query(v[i]);
   }*/
   dnc(v,u,1);
   for(i=1;i<=n*2;i++)
   {
       if(perm[i]==0)
        continue;
       Answer(i,perm[i]);
   }
}

Compilation message (stderr)

minerals.cpp: In function 'void dnc(std::vector<int>, std::vector<int>, ll)':
minerals.cpp:42:6: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   42 |     x=s-x;
      |     ~^~~~

• 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