Submission #1112885

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112885		luvna	Bank (IZhO14_bank)	C++14	0 / 100	2 ms	2584 KiB

bank

#include<bits/stdc++.h>

#define all(v) v.begin(), v.end()
#define endl "\n"

using namespace std;

const int N = 21;

int n, m;
int a[N], b[N];
int dp[(1 << 21)+15];
int sum[(1 << 21)+15];

void solve(){
    cin >> n >> m;

    for(int i = 0; i < n; i++) cin >> a[i];

    for(int i = 0; i < m; i++) cin >> b[i];

    for(int i = 1; i < (1 << m); i++) dp[i] = sum[i] = -1;

    for(int mask = 0; mask < (1 << m); mask++){
        for(int i = 0; i < m; i++){
            if(mask >> i & 1 && dp[mask ^ (1 << i)] != -1){
                int prev_mask = mask ^ (1 << i);
                int cur_sum = sum[prev_mask] + b[i];
                int target = a[dp[prev_mask]];
                if(cur_sum < target){
                    dp[mask] = dp[prev_mask];
                    sum[mask] = cur_sum;
                }
                else if(cur_sum == target){
                    dp[mask]++;
                    sum[mask] = 0;
                }
            }
        }
        if(dp[mask] == n){
            cout << "YES" << endl;
            return;
        }
    }

    cout << "NO" << endl;
}

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

    #define task "task"

    if(fopen(task".INP", "r")){
        freopen(task".INP", "r", stdin);
        freopen(task".OUT", "w", stdout);
    }

    int t; t = 1; //cin >> t;
    while(t--) solve();
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         freopen(task".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |         freopen(task".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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