Submission #369927

#	Time	Username	Problem	Language	Result	Execution time	Memory
369927		nicolaalexandra	Nice sequence (IZhO18_sequence)	C++14	15 / 100	211 ms	44140 KiB

sequence

#include <bits/stdc++.h>
#define DIM 1000010
using namespace std;

vector <int> L[DIM];
int v[DIM],g[DIM];
int n,m,k,t,i,j,idx,ok;

void dfs (int nod){
    v[nod] = ++idx;
    for (auto vecin : L[nod]){
        if (v[vecin])
            ok = 0;
        else dfs (vecin);
    }
}

int verif (int k){
    int i;

    for (i=0;i<=k;i++){
        L[i].clear();
        v[i] = g[i] = 0;
    }

    for (i=n;i<=k;i++){
        L[i].push_back(i-n);
        g[i-n]++;
    }

    for (i=m;i<=k;i++){
        L[i-m].push_back(i);
        g[i]++;
    }

    idx = 0, ok = 1;
    for (i=0;i<=k;i++){
        if (!g[i])
            dfs (i);
    }

    if (!idx)
        return 0;

    return ok;
}

int main (){

    //ifstream cin ("date.in");
    //ofstream cout ("date.out");

    cin>>t;
    for (;t--;){
        cin>>n>>m;
        if (n % m == 0){
            cout<<n-1<<"\n";
            for (i=1;i<=n-1;i++)
                cout<<"1 ";
            if (n > 1)
                cout<<"\n";
            continue;
        }

        if (m % n == 0){
            cout<<m-1<<"\n";
            for (i=1;i<=m-1;i++)
                cout<<"-1 ";
            if (m > 1)
                cout<<"\n";
            continue;
        }

        int st = min(n,m)-1, dr = 1000000, sol = 0;
        while (st <= dr){
            int mid = (st+dr)>>1;
            if (verif(mid)){
                sol = mid;
                st = mid+1;
            } else dr = mid-1;
        }

        verif (sol);

        cout<<sol<<"\n";
        for (i=1;i<=sol;i++)
            cout<<v[i]-v[i-1]<<" ";
        cout<<"\n";
    }

    return 0;
}

• 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