Submission #648174

#	Time	Username	Problem	Language	Result	Execution time	Memory
648174		TS_2392	Bank (IZhO14_bank)	C++14	0 / 100	2 ms	388 KiB

bank

#include <bits/stdc++.h>
#define FAST ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define rall(x) (x).rbegin(), (x).rend()
#define all(x) (x).begin(), (x).end()
#define sqr(x) (x) * (x)

#define epb emplace_back
#define lwb lower_bound
#define upb upper_bound

#define mp make_pair
#define fi first
#define se second

using namespace std;

typedef long long ll;
typedef long double ldb;
typedef unsigned int uint;
typedef unsigned long long ull;

typedef pair<ll, ll> pll;
typedef pair<ll, int> pli;
typedef pair<int, ll> pil;
typedef pair<int, int> pii;
typedef pair<ldb, ldb> pld;
typedef pair<double, double> pdd;
const int oo = 1e4;
int n, m, a[21], b[21];
pii dp[1 << 20];
int main(){
    FAST;
    freopen("bank.in", "r", stdin);
    freopen("bank.out", "w", stdout);
    cin >> n >> m;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    for(int i = 0; i < m; ++i) cin >> b[i];
    dp[0] = mp(1, 0);
    for(int mask = 1; mask < 1 << m; ++mask){
        dp[mask].se = oo;
        for(int i = 0; i < m; ++i) if(mask >> i & 1){
            int x = mask ^ 1 << i, idx = dp[x].fi;
            if(dp[x].se >= oo) continue;
            if(dp[x].se + b[i] > a[idx]) break;
            dp[mask].fi = dp[x].fi;
            dp[mask].se = dp[x].se + b[i];
            if(dp[mask].se == a[idx]){
                dp[mask].fi++;
                dp[mask].se = 0;
            }
            break;
        }
        if(dp[mask].fi == n + 1 && dp[mask].se == 0){
            cout << "YES";
            exit(0);
        }
    }
    cout << "NO";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen("bank.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen("bank.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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