Submission #1030894

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030894		kiethm07	Bank (IZhO14_bank)	C++11	100 / 100	84 ms	8644 KiB

bank

#include <bits/stdc++.h>

#define pii pair<int,int>
#define iii pair<int,pii>
#define fi first
#define se second

#define vi vector<int>
#define vii vector<pii>
#define pb(i) push_back(i)
#define all(x) x.begin(),x.end()

#define TEXT "a"

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const int inf = 1e9 + 7;
const ld eps = 1e-8;
const double pi = acos(-1);
const int N = 20;

int n,m;
int a[N], b[N];
int dp[1 << N], r[1 << N];

int main(){
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen(TEXT".inp","r")){
        freopen(TEXT".inp","r",stdin);
        freopen(TEXT".out","w",stdout);
    }
    cin >> n >> m;
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < m; i++) cin >> b[i];
    memset(dp,-1,sizeof(dp));
    dp[0] = 0;
    for (int mask = 0; mask < (1 << m); mask++){
        for (int i = 0; i < m; i++){
            if (!(mask & (1 << i))) continue;
            int submask = mask ^ (1 << i);
            if (dp[submask] == -1) continue;
            int p = dp[submask];
            int cur = r[submask] + b[i];
            if (cur < a[p]){
                dp[mask] = dp[submask];
                r[mask] = cur;
            }
            if (cur == a[p]){
                dp[mask] = dp[submask] + 1;
                r[mask] = 0;
            }
        }
        if (dp[mask] == n){
            cout << "YES\n";
            return 0;
        }
    }
    cout << "NO\n";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:33:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         freopen(TEXT".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
bank.cpp:34:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |         freopen(TEXT".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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