Submission #1129362

#	Time	Username	Problem	Language	Result	Execution time	Memory
1129362		Gray	Nice sequence (IZhO18_sequence)	C++20	6 / 100	1 ms	328 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define ld long double
#define ff first
#define ss second
#define ln "\n"
#define mp make_pair

const ll INF = 2e18;
const ll MOD = 1e9+7;

void solve(){
    ll n, m; cin >> n >> m;
    ll mx = max(m, n), mn = min(m, n);
    if (mx%mn==0){
        cout << mx-1 << ln;
        for (ll i=0; i<mx-1; i++){
            cout << (mn==n?-1:1) << " ";
        }
        cout << ln;
    }else{
        ll mid = (mx/mn+1)*mn-mx;
        // cout << mn-mid << " : " << mid << ln;
        vector<ll> res;
            ll nmid = mn-mid;
            /*
            should:
            midv*mid>nmidv*nmid
            midv*mid<nmidv*nmid*2

            mid/(nmid)>nmidv/midv>mid/((nmid)*2)
            mid -> 3
            nmid -> 1
            3/1>nmidv/midv>3/2
            nmidv -> 6
            midv -> 3
            */
            ll nmidv = mid*2, midv = (nmid*3);

            for (ll i=0; i<mx/mn; i++){
                for (ll j=0; j<mn-mid; j++){
                    res.push_back(nmidv);
                }
                for (ll j=0; j<mid; j++){
                    res.push_back(-midv);
                }
            }
            for (ll i=0; i<mn-mid; i++){
                res.push_back(nmidv);
            }

        if (mn!=n){
            for (auto &ch:res) ch=-ch;
        }
        cout << res.size() << ln;
        for (auto ch:res) cout << ch << " ";
        cout << ln;
    }
}
/*
5 5 -4 -4 -4 5 5
nmidv/midv<mid/(mn-mid)
midv*mid<nmidv*(mn-mid)*2

mid/((nm-mid)*2)<nmidv/midv<mid/(mn-mid)
19 4 x 10 2

*/
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    auto start = chrono::high_resolution_clock::now();
    ll t=1;
    cin >> t;
    while (t--) solve();
    #ifdef LOCAL
    auto duration = chrono::duration_cast<chrono::microseconds>(chrono::high_resolution_clock::now() - start);
    cout << setprecision(0) << fixed << "time: " << (double)duration.count()/1000.0 << " milliseconds" << endl;
    #endif
}

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