Submission #563378

#	Time	Username	Problem	Language	Result	Execution time	Memory
563378		armashka	Building 4 (JOI20_building4)	C++17	0 / 100	2093 ms	596 KiB

building4

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
 
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file(s) freopen(s".in", "r", stdin);freopen(s".out", "w", stdout);
#define nano chrono::steady_clock::now().time_since_epoch().count()
#define uid uniform_int_distribution<int>
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define sz size()
#define ft first
#define sd second
 
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef unsigned long long ull;
    
const int N = 2e5 + 10;
const int M = 2e3 + 5;
const ll inf = 1e15;
const ll mod = 1e9 + 7;
const double Pi = acos(-1); 
 
ll binpow(ll x, ll ti) { ll res = 1;while (ti){if(ti & 1)res *= x;x *= x;ti >>= 1; x %= mod; res %= mod;} return res;}
ll binmul(ll x, ll ti) { ll res = 0;while (ti){if(ti & 1)res += x;x += x;ti >>= 1; x %= mod; res %= mod;} return res;}
ll random(ll l, ll r) { mt19937 rnd(nano); uid dist(l, r); return dist(rnd); }
ll nok(ll a, ll b) { return (a*b)/__gcd(abs(a),abs(b)) * (a*b > 0 ? 1 : -1); }
bool odd(ll n) { return (n % 2 == 1); }                                   
bool even(ll n) { return (n % 2 == 0); }

ll n, a[4005], b[4005];
string res;

void rec(ll pos, ll c1, ll c2, ll prev) {
    if (pos == 2 * n + 1) {
        cout << res;
        exit(0);
    }
    if (c2 < n && prev <= b[pos]) {
        res.push_back('B');
        rec(pos + 1, c1, c2 + 1, b[pos]);
        res.pop_back();
    }
    if (c1 < n && prev <= a[pos]) {
        res.push_back('A');
        rec(pos + 1, c1 + 1, c2, a[pos]);
        res.pop_back();
    }
}

const void solve(/*Armashka*/) {
    cin >> n;
    for (int i = 1; i <= 2 * n; ++ i) cin >> a[i];
    for (int i = 1; i <= 2 * n; ++ i) cin >> b[i];
    rec(1, 0, 0, 0);
    cout << -1;
}

signed main() {
    srand(time(NULL));
    fast;
    // file("");
    int tt = 1;

    // cin >> tt;
    for (int i = 1; i <= tt; ++ i) {
        solve();
    }        
}
// Andetemin sen uwin de, men uwin de, yerten bolsyn dep
// Qara kunder artta, wekara joq alda

Compilation message (stderr)

building4.cpp:5: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    5 | #pragma comment(linker, "/stack:200000000")
      |

• Subtask 1: 0 / 11
• Subtask 2: 0 / 89