제출 #1175366

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1175366		Hisu	은행 (IZhO14_bank)	C++20	100 / 100	970 ms	70456 KiB

bank

// Chaiyo...
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
#define ed "\n"
//#define int long long

const int N = 2e6 + 5;
int n, m, a[N], b[N];
vector<int> st[N];

struct chash {
	const uint64_t C = ll(4e18*acos(0))+71; // large odd number
	const int RANDOM = rand();
	ll operator()(ll x) const { return __builtin_bswap64((x^RANDOM)*C); }
};

template<class K,class V> using ht = gp_hash_table<K,V,chash>;
template<class K,class V> V get(ht<K,V>& u, K x) {
	auto it = u.find(x); return it == end(u) ? 0 : it->s; }

void solve(int iTest){
    cin >> n >> m;
    for(int i = 1; i <= n; i++) cin >> a[i];
    for(int i = 1; i <= m; i++) cin >> b[i];

    for(int mask = 1; mask < (1 << m); mask++) {
        int sum = 0;
        for(int i = 0; i < m; i++) if(mask >> i & 1) sum += b[i + 1];
        st[sum].push_back(mask);
    }

    gp_hash_table<int, bool> dp;
    dp[0] = true;
    for(int i = 1; i <= n; i++) {
        gp_hash_table<int, bool> new_dp;
        for(int val : st[a[i]]) {
            for(auto [mask, x] : dp) if((mask & val) == 0)
                new_dp[mask ^ val] = true;
        }

        dp.swap(new_dp);
        if(dp.size() == 0) break;
    }

    if(dp.size()) cout << "YES";
    else cout << "NO";
}

#define TASK "main"

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

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

    int T = 1;
//    cin >> T;
    for(int iTest = 1; iTest <= T; iTest++){
        solve(iTest);
    }
}

/**
**/

컴파일 시 표준 에러 (stderr) 메시지

bank.cpp: In function 'int main()':
bank.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen(TASK ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen(TASK ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen("main.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
bank.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen("main.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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