Submission #745136

#	Time	Username	Problem	Language	Result	Execution time	Memory
745136		7oSkaa	Bank (IZhO14_bank)	C++17	71 / 100	1085 ms	107084 KiB

bank

#include <bits/stdc++.h>

using namespace std;

#define fixed(n) fixed << setprecision(n)
#define ceil(n, m) (((n) + (m) - 1) / (m))
#define add_mod(a, b, m) (((a % m) + (b % m)) % m)
#define sub_mod(a, b, m) (((a % m) - (b % m) + m) % m)
#define mul_mod(a, b, m) (((a % m) * (b % m)) % m)
#define all(vec) vec.begin(), vec.end()
#define rall(vec) vec.rbegin(), vec.rend()
#define sz(x) int(x.size())
#define debug(x) cout << #x << ": " << (x) << "\n";
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define EPS 1e-9
constexpr int INF = 1 << 30, Mod = 1e9 + 7;
constexpr ll LINF = 1LL << 62;
#define PI acos(-1)
template < typename T = int > using Pair = pair < T, T >;
vector < string > RET = {"NO", "YES"};

template < typename T = int > istream& operator >> (istream &in, vector < T > &v) {
    for (auto &x : v) in >> x;
    return in;
}

template < typename T = int > ostream& operator << (ostream &out, const vector < T > &v) { 
    for (const T &x : v) out << x << ' '; 
    return out;
}

int n, m;
vector < int > a, b;
vector < vector < int > > dp, adj;

int can_do(int idx, int mask){
    if(idx == n) return true;
    int &ret = dp[idx][mask];
    if(~ret) return ret;
    ret = false;
    for(auto& x : adj[idx]){
        if(x & mask) continue;
        if(can_do(idx + 1, mask | x))
            return ret = true;
    }
    return ret;
}

void build_adj(){
    adj = vector < vector < int > > (n);
    for(int i = 0; i < n; i++){
        for(int j = 0; j < (1 << m); j++){
            int mask = 0, currX = 0;
            for(int bit = 0; bit < m; bit++)
                if((j >> bit) & 1)
                    mask |= (1 << bit), currX += b[bit];
            if(currX == a[i])
                adj[i].push_back(mask);
        }
    }
}

void Solve(){
    cin >> n >> m;
    a = vector < int > (n);
    b = vector < int > (m);
    cin >> a >> b;
    dp = vector < vector < int > > (n + 5, vector < int > (1 << m, -1));
    build_adj();
    cout << RET[can_do(0, 0)] << '\n'; 
}

int main(){
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
    int test_cases = 1;
    // cin >> test_cases;
    for(int tc = 1; tc <= test_cases; tc++){
        // cout << "Case #" << tc << ": ";
        Solve();
    }
    return 0;
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29