Submission #83439

#	Time	Username	Problem	Language	Result	Execution time	Memory
83439		Bodo171	Rope (JOI17_rope)	C++14	100 / 100	1545 ms	121688 KiB

rope

#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
const int nmax=1000*1000+5;
vector<int> l[nmax],v[nmax];
int pr[nmax];
int comb[nmax];
int a[nmax],ap[nmax],ans[nmax];
int n,m,i,j,nr,pnt;
int check(int a,int b)
{
    return n-(ap[a]+ap[b]-comb[b]);
}
void solve(int st,int dr)
{
    for(i=1;i<=m;i++)
        v[i].clear();
    for(i=st;i<dr;i+=2)
        if(a[i]!=a[i+1])
        {
            v[a[i]].push_back(a[i+1]);
            v[a[i+1]].push_back(a[i]);
        }
    for(i=1;i<=m;i++)
    {
        for(j=0;j<v[i].size();j++)
            comb[v[i][j]]++;
        for(j=0;j<v[i].size();j++)
            ans[i]=min(check(i,v[i][j]),ans[i]);
        pnt=m;
        while(pnt>0&&(comb[pr[pnt]]||pr[pnt]==i))
            pnt--;
        if(pnt)
            ans[i]=min(check(i,pr[pnt]),ans[i]);
        for(j=0;j<v[i].size();j++)
            comb[v[i][j]]--;
    }
}
int main()
{
    //freopen("data.in","r",stdin);
    ios_base::sync_with_stdio(false);
    cin>>n>>m;
    for(i=1;i<=m;i++)
        ans[i]=n;
    for(i=1;i<=n;i++)
    {
        cin>>a[i];
        ap[a[i]]++;
        ans[a[i]]--;
    }
    nr=0;
    for(i=1;i<=m;i++)
        l[ap[i]].push_back(i);
    for(i=1;i<=n;i++)
        for(j=0;j<l[i].size();j++)
          pr[++nr]=l[i][j];
    solve(1,n-n%2);
    solve(2,n-1+n%2);
    for(i=1;i<=m;i++)
        cout<<ans[i]<<'\n';
    return 0;
}

Compilation message (stderr)

rope.cpp: In function 'void solve(int, int)':
rope.cpp:27:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<v[i].size();j++)
                 ~^~~~~~~~~~~~
rope.cpp:29:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<v[i].size();j++)
                 ~^~~~~~~~~~~~
rope.cpp:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<v[i].size();j++)
                 ~^~~~~~~~~~~~
rope.cpp: In function 'int main()':
rope.cpp:57:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<l[i].size();j++)
                 ~^~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 20 / 20