Submission #1269775

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269775		MMihalev	JOIRIS (JOI16_joiris)	C++20	45 / 100	188 ms	2768 KiB

joiris

#include<iostream>
#include<vector>
#include<random>
using namespace std;
const int MAX_N=55;
const int MAX=1502;
mt19937 rng(903532);
bool stat[MAX+5][MAX+5];
int a[MAX_N];
int n,k;
vector<pair<int,int>>ans;
void rem(int target_row)
{
    for(int row=target_row;row<=MAX;row++)
    {
        for(int col=1;col<=n;col++)
        {
            stat[row][col]=stat[row+1][col];
        }
    }
}
bool full(int row)
{
    for(int col=1;col<=n;col++)
    {
        if(stat[row][col]==0)return 0;
    }
    return 1;
}
void fix()
{
    for(int row=1;row<=MAX;row++)
    {
        while(full(row))rem(row);
    }
    for(int col=1;col<=n;col++)
    {
        a[col]=0;
        while(stat[a[col]+1][col])a[col]++;
    }
}
void puthorizontal(int x)
{
    int y=0;
    for(int col=x;col<=x+k-1;col++)
    {
        y=max(y,a[col]);
    }
    for(int col=x;col<=x+k-1;col++)
    {
        stat[y+1][col]=1;
    }
    fix();
    ans.push_back({2,x});
}
void putvertical(int x)
{
    int y=a[x]+1;
    for(int row=y;row<=y+k-1;row++)
    {
        stat[row][x]=1;
    }
    fix();
    ans.push_back({1,x});
}
int firstbad()
{
    for(int i=2;i<=n;i++)
    {
        if(a[i]<a[i-1])return i;
    }
    return n+1;
}
int sum()
{
    int res=0;
    for(int i=1;i<=n;i++)res+=a[i];
    return res;
}
int firstbl(int row)
{
    for(int col=1;col<=n;col++)
    {
        if(stat[row][col])return col;
    }
    return n+1;
}
void check()
{
    return;
    for(int i=1;i<=n;i++)
    {
        cout<<a[i]<<" ";
    }cout<<"\n";
}
void print()
{
    cout<<ans.size()<<"\n";
    for(auto [type,where]:ans)
    {
        cout<<type<<" "<<where<<"\n";
    }
}
void balance()
{
    while(firstbad()<=n)
    {
        int i=firstbad();
        while(a[i]<a[i-1])
        {
            putvertical(i);
        }
    }
}
void solve()
{
    if(n%k==0 && sum()%k!=0)
    {
        cout<<-1<<"\n";
        return;
    }

    balance();check();

    while(1)
    {
        int row=1;
        while(1)
        {
            int col=firstbl(row);
            if(col==n+1)break;

            if(col-1<k)
            {
                row++;continue;
            }

            for(int i=col-1;i>=k;i-=k)
            {
                puthorizontal(i-k+1);
            }
        }

        check();

        for(int col=1;col<k;col++)
        {
            check();
            int times=min(max(0,(MAX-5-a[col]))/k,100);
            while(times>0)
            {
                putvertical(col);
                times--;
            }
        }
        check();
        if(n%k==0)
        {
            int ma=0;
            for(int col=1;col<k;col++)
            {
                ma=max(ma,a[col]);
                if(a[col]%k!=0)
                {
                    cout<<-1<<"\n";
                    return;
                }
            }
            for(int col=1;col<n;col++)
            {
                while(a[col]<ma){putvertical(col);check();}
            }
            int times=ma/k;
            while(times>0)
            {
                putvertical(n);
                times--;
            }
        }
        else
        {
            int ma=0;
            for(int col=1;col<=n%k;col++)
            {
                ma=max(ma,a[col]);
                if(col>1 && a[col]%k!=a[col-1]%k)
                {
                    cout<<-1<<"\n";
                    return;
                }
            }

            for(int col=n%k+1;col<=k;col++)
            {
                ma=max(ma,a[col]);
                if(a[col]%k!=0)
                {
                    cout<<-1<<"\n";
                    return;
                }
            }

            for(int col=1;col<=n%k;col++)
            {
                while(a[col]<ma)putvertical(col);
            }

            ma-=a[1]%k;

            for(int col=n%k+1;col<=n;col++)
            {
                int cur=a[col];
                while(cur<ma)
                {
                    putvertical(col);
                    cur+=k;
                }
                putvertical(col);
            }

            int rem=k-a[n%k+1];
            while(rem>0)
            {
                for(int col=n%k+1;col<=n;col+=k)
                {
                    puthorizontal(col);
                }
                rem--;
            }

            for(int col=1;col<=n%k;col++)
            {
                putvertical(col);
            }
        }

        break;
    }

    print();
}
int main ()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    cin>>n>>k;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        for(int row=1;row<=a[i];row++)stat[row][i]=1;
    }

    solve();

    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 0 / 55