Submission #389986

#	Time	Username	Problem	Language	Result	Execution time	Memory
389986		wiwiho	Binary Subsequences (info1cup17_binary)	C++14	100 / 100	682 ms	324 KiB

binary

#include <bits/stdc++.h>
#include <bits/extc++.h>

#define StarBurstStream ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define iter(a) a.begin(), a.end()
#define riter(a) a.rbegin(), a.rend()
#define lsort(a) sort(iter(a))
#define gsort(a) sort(riter(a))
#define pb(a) push_back(a)
#define eb(a) emplace_back(a)
#define pf(a) push_front(a)
#define ef(a) emplace_front(a)
#define pob pop_back()
#define pof pop_front()
#define mp(a, b) make_pair(a, b)
#define F first
#define S second
#define mt make_tuple
#define gt(t, i) get<i>(t)
#define tomax(a, b) ((a) = max((a), (b)))
#define tomin(a, b) ((a) = min((a), (b)))
#define topos(a) ((a) = (((a) % MOD + MOD) % MOD))
#define uni(a) a.resize(unique(iter(a)) - a.begin())
#define printv(a, b) {bool pvaspace=false; \
for(auto pva : a){ \
    if(pvaspace) b << " "; pvaspace=true;\
    b << pva;\
}\
b << "\n";}

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<ld, ld>;
using tiii = tuple<int, int, int>;

const ll MOD = 1000000007;
const ll MAX = 2147483647;

template<typename A, typename B>
ostream& operator<<(ostream& o, pair<A, B> p){
    return o << '(' << p.F << ',' << p.S << ')';
}

ll ifloor(ll a, ll b){
    if(b < 0) a *= -1, b *= -1;
    if(a < 0) return (a - b + 1) / b;
    else return a / b;
}

ll iceil(ll a, ll b){
    if(b < 0) a *= -1, b *= -1;
    if(a > 0) return (a + b - 1) / b;
    else return a / b;
}

int main(){
    StarBurstStream

    int T;
    cin >> T;
    while(T--){

        int k;
        cin >> k;

        int mn = k, mnp = 1;
        int ans = 0;
        for(int _z = 1; _z + 1 <= k + 2; _z++){
            int z = _z;
            int o = k + 2 - z;
            if(z >= o) break;
            if(__gcd(o, z) != 1) continue;
            ans += 2;

            int cnt = 0;
            while(o > 0 && z > 0){
                if(o > z){
                    cnt += o / z;
                    o %= z;
                }
                else{
                    cnt += z / o;
                    z %= o;
                }
            }
            cnt--;
            if(cnt < mn){
                mn = cnt;
                mnp = _z;
            }
        }
//        cerr << mn << " " << mnp << "\n";

        int z = mnp, o = k + 2 - z;
        vector<int> s;
        while(o > 0 && z > 0){
//            cerr << o << " " << z << "\n";
            if(o > z){
                o -= z;
                s.eb(0);
            }
            else{
                z -= o;
                s.eb(1);
            }
        }
        s.pob;

        cout << ans << "\n";
        printv(s, cout);
    }

    return 0;
}

• Subtask 1: 43 / 43
• Subtask 2: 39 / 39
• Subtask 3: 18 / 18