Submission #83388

#	Time	Username	Problem	Language	Result	Execution time	Memory
83388		Bodo171	Rope (JOI17_rope)	C++14	0 / 100	48 ms	47388 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 a[nmax],simple[nmax],duble[nmax],comb[nmax],ans[nmax];
int n,m,i,j,nr,pnt;
int check(int a,int b)
{
    return n-(simple[a]+simple[b]+2*duble[a]+2*duble[b]-comb[b]);
}
void solve(int st,int dr)
{
    if(st>dr)
        return;
    for(i=1;i<=m;i++)
        v[i].clear(),l[i].clear(),simple[i]=duble[i]=0;
    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]);
        }
        if(a[i]==a[i+1]) duble[a[i]]++;
        else simple[a[i]]++,simple[a[i+1]]++;
    }
    if(st>1) simple[a[st-1]]++;
    if(dr<n) simple[a[dr+1]]++;
    nr=0;
    for(i=1;i<=m;i++)
        l[2*duble[i]+simple[i]].push_back(i);
    for(i=1;i<=n;i++)
        for(j=0;j<l[i].size();j++)
          pr[++nr]=i;
    for(i=1;i<=m;i++)
      if(ans[i]!=n)
    {
        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]);
        if(i!=a[1])
            ans[i]=min(check(i,a[1]),ans[i]);
        if(i!=a[n])
            ans[i]=min(check(i,a[n]),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);
    cin>>n>>m;
    for(i=1;i<=m;i++)
        ans[i]=n;
    for(i=1;i<=n;i++)
    {
        cin>>a[i];
        ans[a[i]]--;
    }
    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:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<l[i].size();j++)
                 ~^~~~~~~~~~~~
rope.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<v[i].size();j++)
                 ~^~~~~~~~~~~~
rope.cpp:43:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<v[i].size();j++)
                 ~^~~~~~~~~~~~
rope.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=0;j<v[i].size();j++)
                 ~^~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 30
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 20