Submission #704754

#	Time	Username	Problem	Language	Result	Execution time	Memory
704754		becaido	Lutrija (COCI19_lutrija)	C++17	7 / 70	1 ms	324 KiB

lutrija

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout(T t, U...u) {cout << t << (sizeof...(u) ? ", " : ""), dout(u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

ll A, B;

bool is_prime(ll x) {
    if (x <= 1) return 0;
    FOR (i, 2, sqrt(x)) if (x % i == 0) return 0;
    return 1;
}

void solve() {
    cin >> A >> B;
    if (is_prime(abs(A - B))) {
        cout << "2\n";
        cout << A << ' ' << B << '\n';
        return;
    }
    if (A % 2 && B % 2) {
        if (is_prime(abs(A - 2)) && is_prime(abs(B - 2))) {
            cout << "3\n";
            cout << A << ' ' << 2 << ' ' << B << '\n';
        } else {
            cout << "-1\n";
        }
        return;
    }
    ll mx = max(A, B);
    for (ll x : {mx - 2, mx + 2}) if (is_prime(x) && is_prime(abs(A - x)) && is_prime(abs(B - x))) {
        cout << "3\n";
        cout << A << ' ' << x << ' ' << B << '\n';
        return;
    }
    cout << "-1\n";
}

int main() {
    Waimai;
    solve();
}

• Subtask 1: 0 / 7
• Subtask 2: 7 / 7
• Subtask 3: 0 / 7
• Subtask 4: 0 / 7
• Subtask 5: 0 / 7
• Subtask 6: 0 / 7
• Subtask 7: 0 / 7
• Subtask 8: 0 / 7
• Subtask 9: 0 / 7
• Subtask 10: 0 / 7