Submission #671431

#	Time	Username	Problem	Language	Result	Execution time	Memory
671431		Alihan_8	Bank (IZhO14_bank)	C++17	19 / 100	2 ms	596 KiB

bank

#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make_pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define int long long
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n, m; cin >> n >> m;
    vector <int> a(n), b(m);
    for ( auto &i: a ) cin >> i;
    for ( auto &i: b ) cin >> i;
    const int N = 2e4+1;
    for ( auto i: a ){
        vector <int> dp(N), ind(N); dp[0] = 1; ind[0] = -1;
        int it = 0;
        for ( auto val: b ){
            for ( int j = N-1; j >= val; j-- ){
                if ( ind[j-val] and !ind[j] ) dp[j] = j-val, ind[j] = it+1;
            } it++;
        }
        if ( !ind[i] ){
            cout << "NO\n";
            return 0;
        }
        vector <int> used((int)b.size());
        while ( i ){
            used[ind[i-1]] = 1;
            i = dp[i];
        }
        vector <int> newb;
        for ( int j = 0; j < (int)b.size(); j++ ){
            if ( !used[j] ) newb.pb(b[j]);
        }
        b = newb;
    }
    cout << "YES";

    cout << '\n';
}

Compilation message (stderr)

bank.cpp: In function 'void IO(std::string)':
bank.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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