Submission #885758

#	Time	Username	Problem	Language	Result	Execution time	Memory
885758		degiakhanh	Bank (IZhO14_bank)	C++17	27 / 100	754 ms	262144 KiB

bank

/*
 _   _ _                 _           _                       _
| | / | |               | |         | |                     (_)
| |/ /| |__   __ _ _ __ | |__     __| | ___ _ __    ______ _ _
|   ( | '_ \ / _` | '_ \| '_ \   / _` |/ _ \ '_ \  |_  / _` | |
| |\ \| | \ | (_| | | | | | \ | | (_| |  __/ |_) |  / / (_| | |
|_| \_|_| |_|\__,_|_| |_|_| |_|  \__,_|\___| .__/  /___\__,_|_|
                                           | |
                                           |_|
*/

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define ld long double
#define pub push_back
#define puf push_front
#define pob pop_back
#define pof pop_front
#define all(v) v.begin(), v.end()
#define test() \
    int _t;    \
    cin >> _t; \
    while (_t--)
#define testig()  \
    int _t;       \
    cin >> _t;    \
    cin.ignore(); \
    while (_t--)
#define binarys(l, r, lv, rv, mid) for (int l = lv, r = rv, mid = (l + r) >> 1; l <= r; mid = (l + r) >> 1)
#define fi first
#define se second
#define clz(n) 31 - __builtin_clz(n)
#define vec2d(n, m) vector<vector<int>>(n + 1, vector<int>(m + 1, 0))

template <class T, class P>
bool maximize(T &a, P b) {
    if (a < b)
        return a = b, true;
    return false;
}
template <class T, class P>
bool minimize(T &a, P b) {
    if (a > b)
        return a = b, true;
    return false;
}

const ll inf = 0x3f3f3f3f3f3f3f3f;
const int iinf = 0x3f3f3f3f;
const int maxn = 1e5 + 69;
const int mod = 998244353;
const int base = 311;

int n, m;
int A[21], B[21], id[1001];
set<int> a[1001], b;

ll bit = 0;
bool res = false;
string rs[] = {"NO", "YES"};
void bt(int p = 1){
    if(res) return;
    for(int i: a[A[p]]){
        if(bit & i) continue;
        bit ^= i;
        if(p == n) res = true;
        else bt(p + 1);
        if(res) return;
        bit ^= i;
    }
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    if (fopen("main.inp", "r")) {
        freopen("main.inp", "r", stdin);
        freopen("main.out", "w", stdout);
    }

    cin >> n >> m;
    for(int i = 1; i <= n; i++) cin >> A[i];
    a[0].insert(0);
    b.insert(0);
    vector<int> c;
    for(int i = 0; i < m; i++){
        cin >> B[i];
        for(int j: b){
            if(j + B[i] > 1000) continue;
            c.pub(j + B[i]);
            for(int v: a[j]) a[j + B[i]].insert(v | (1 << i));
        }
        while(c.size()){
            b.insert(c.back());
            c.pob();
        }
    }
    bt();
    cout << rs[res];
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:82:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |         freopen("main.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:83:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |         freopen("main.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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