Submission #1292408

#	Time	Username	Problem	Language	Result	Execution time	Memory
1292408		kam	Bank (IZhO14_bank)	C++20	0 / 100	4 ms	5448 KiB

bank

#include<unordered_map>
#include<unordered_set>
#include<algorithm>
#include<iostream>
#include<cstdlib>
#include<iomanip>
#include<cstring>
#include<cassert>
#include<numeric>
#include<vector>
#include<string>
#include<chrono>
#include<random>
#include<stack>
#include<queue>
#include<cmath>
#include<set>
#include<map>
#include<ios>
using namespace std;
int n, m, f = 0;
vector<bool>vs(2e6);
vector<int>a, b;
vector<vector<int>>gp;
bool dfs(int id, int vis) {
    if (id == n) {
        return 1;
    }
    vs[vis] = true;
    for (int& x : gp[a[id]]) {
        if ((vis ^ x) == (vis | x) && !vs[vis | x]) {
            if (dfs(id + 1, vis | x)) return true;
            //if (f) return;
        }
    }
}

void solve()
{
    cin >> n >> m;
    a = vector<int>(n);
    b = vector<int>(m);
    gp = vector<vector<int>>(2e5 + 1);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int j = 0; j < m; j++) cin >> b[j];
    for (int i = 0; i < (1 << m); i++) {
        int sum = 0;
        for (int j = 0; j < m; j++) {
            if ((1 << j) & i) sum += b[j];
        }
        gp[sum].push_back(i);
    }
    //dfs(0, 0);
    cout << (dfs(0,0) ? "YES" : "NO");
}

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

    //freopen("bank.in", "r", stdin);
    //freopen("bank.out", "w", stdout);

    //signed _; cin >> _; while (_--)
    solve();
}

Compilation message (stderr)

bank.cpp: In function 'bool dfs(int, int)':
bank.cpp:36:1: warning: control reaches end of non-void function [-Wreturn-type]
   36 | }
      | ^

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