Submission #1175351

#	Time	Username	Problem	Language	Result	Execution time	Memory
1175351		Hisu	Bank (IZhO14_bank)	C++20	71 / 100	1096 ms	62932 KiB

bank

// Chaiyo...
#include <bits/stdc++.h>
using namespace std;

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];

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);
    }

    unordered_map<int, bool> dp;
    dp[0] = true;
    for(int i = 1; i <= n; i++) {
        unordered_map<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);
    }
}

/**
**/

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(TASK ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:49:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         freopen(TASK ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen("main.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
bank.cpp:53:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         freopen("main.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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