Submission #1017101

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017101		daviedu	Bank (IZhO14_bank)	C++17	71 / 100	1076 ms	8540 KiB

bank

#include <bits/stdc++.h>
using namespace std;

#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define ll long long

struct P{
    ll x, y;
};

void dbg_out() { cerr << endl; }
template <typename H, typename... T>
void dbg_out(H h, T... t) { cerr << ' ' << h; dbg_out(t...); }
#define dbg(...) { cerr << #__VA_ARGS__ << ':'; dbg_out(__VA_ARGS__); }


// a little bit too slow

signed main(){
    fastio;
    int n, m;
    cin >> n >> m;
    vector<int> pay (n), notes (m);
    for (auto &a: pay) cin >> a;
    for (auto &a: notes) cin >> a;
    vector<pair<int, int>> dp ((1 << m), {-1, 0});
    int a, b;
    bool ans=false;
    for (int i=0; i<n; i++){
        for (int mask=1; mask<(1<<m); mask++){
            for (int j=0; j<m; j++){
                if (!(mask & (1 << j))) continue;
                if (dp[mask^(1<<j)].first == i) {
                    dp[mask] = {dp[mask^(1<<j)].first, dp[mask^(1<<j)].second+notes[j]};
                    break;
                }
                else if (dp[mask^(1<<j)].first == i-1){
                    if (dp[mask^(1<<j)].second+notes[j] == pay[i]){
                        dp[mask] = {i, 0};
                        break;
                    }
                    dp[mask] = {dp[mask^(1<<j)].first, dp[mask^(1<<j)].second+notes[j]};
                }
            }
            if (dp[mask].first == n-1) ans = true;
        }
    }

    cout << (ans? "YES" : "NO") << '\n';
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:29:9: warning: unused variable 'a' [-Wunused-variable]
   29 |     int a, b;
      |         ^
bank.cpp:29:12: warning: unused variable 'b' [-Wunused-variable]
   29 |     int a, b;
      |            ^

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