Submission #869566

#	Time	Username	Problem	Language	Result	Execution time	Memory
869566		alexdd	Nice sequence (IZhO18_sequence)	C++17	15 / 100	6 ms	1116 KiB

sequence

#include<bits/stdc++.h>
using namespace std;
int rez[400005];
int krez;
const int INF = 1e8;
/**
n = 4
m = 11
1 1 1 -4 1 1 1 -4 1 2
*/
void solve(int n, int m)
{
    if(n==m)
    {
        krez=n-1;
        for(int i=1;i<n;i++)
            rez[i]=1;
        return;
    }
    if(m%n==0)
    {
        krez=m-1;
        for(int i=1;i<m;i++)
            rez[i]=-1;
        return;
    }
    if(n==2)
    {
        krez=m;
        for(int i=1;i<=m;i++)
        {
            if(i%2==1)
                rez[i]=INF;
            else
                rez[i]=-(INF+1);
        }
        return;
    }
    while(m%n!=n-1)
        m++;
    krez=m;
    int ult=n;
    for(int i=n;i<=m;i+=n)
    {
        for(int j=i-n+1;j<i;j++)
            rez[j]=1;
        rez[i]=-n;
        ult=i;
    }
    for(int j=ult+1;j<=m;j++)
        rez[j]=1;
}
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    int t;
    cin>>t;
    while(t--)
    {
        int n,m;
        cin>>n>>m;
        bool bl=0;
        if(n>m)
        {
            swap(n,m);
            bl=1;
        }
        solve(n,m);
        cout<<krez<<"\n";
        for(int i=1;i<=krez;i++)
        {
            if(!bl)
                cout<<rez[i]<<" ";
            else
                cout<<-rez[i]<<" ";
        }
        cout<<"\n";
    }
    return 0;
}
/**

pref[i] - pref[i-n] < 0
pref[i] - pref[i-m] > 0

pref[i-n] > pref[i]
pref[i-m] < pref[i]


n = 4
m = 11
1 1 1 -4 1 1 1 -4 1 1 1

m - 2 * m/n > 0

n = 2
m = 11
5 -6 5 -6 5 -6 5

*/

• Subtask 1: 6 / 6
• Subtask 2: 9 / 9
• Subtask 3: 0 / 14
• Subtask 4: 0 / 15
• Subtask 5: 0 / 14
• Subtask 6: 0 / 18
• Subtask 7: 0 / 24