Submission #871942

#	Time	Username	Problem	Language	Result	Execution time	Memory
871942		chuongdan	Bank (IZhO14_bank)	C++14	0 / 100	3 ms	2396 KiB

bank

#include <bits/stdc++.h>
#define N 20
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define rep(i, l, r) for(int i = l; i <= r; i++)
#define rep2(i, l, r) for(int i = r; i >= l; i--)

using namespace std;
typedef pair<int,int> ii;
typedef pair<ii,int> iii;
typedef pair<ii, ii> iv;
typedef unsigned long long ull;

const int MOD = 1e9 + 7;
const int inf = 1e9;
const bool multi_test = false;

const string NAME = "bank";

int exp(int x, int y){
    int res = 1;
    while (y){
        if (y & 1) res = res * x % MOD;
        x = x * x % MOD;
        y >>= 1;
    }
    return res;
}

int n, m;
int a[N+5], b[N+5];
bool dp[N+5][(1<<N)+5];
int sum_mask[(1<<N)+5];

void solve(){
    cin >> n >> m;
    rep(i, 1, n) cin >> a[i];
    rep(i, 1, m) cin >> b[i];
    rep(mask, 1, (1<<m) - 1){
        rep(i, 1, m){
            if ((mask >> (i-1)) & 1) sum_mask[mask] += b[i];
        }
    }
    dp[0][0] = 1;
    rep(i, 1, n){
        rep(mask, 0, (1<<m) - 1){
            for(int mask2 = mask; mask2; mask2 = (mask2 - 1) & mask){
                int k = mask ^ mask2;
                if (dp[i-1][mask2] && sum_mask[k] == a[i]){
                    dp[i][mask] = 1;
                }
            }
            if (sum_mask[mask] == a[i] && dp[i-1][0]) dp[i][mask] = 1;
//            cout << i << " " << mask << " " << dp[i][mask] << endl;
        }
    }
    bool ac = false;
    rep(mask, 1, (1<<m) - 1){
        if (dp[n][mask]) ac = true;
    }
    if (ac) cout << "YES";
    else cout << "NO";
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
//    #ifndef ONLINE_JUDGE
        freopen((NAME + ".in").c_str(), "r", stdin);
        freopen((NAME + ".out").c_str(), "w", stdout);
//    #endif // ONLINE_JUGDE
    int t = 1;
    if (multi_test) cin >> t;
    while (t--) solve();
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen((NAME + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen((NAME + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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