Submission #1072385

#	Time	Username	Problem	Language	Result	Execution time	Memory
1072385		Phongnv	Bank (IZhO14_bank)	C++14	100 / 100	104 ms	16852 KiB

bank

/// PhongVan cbhk64
#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define fo(i, l, r) for(int i = l; i <= r; i++)
#define foi(i, l, r) for(int i = l; i >= r; i--)
#define pii pair<int, int>
#define mx(x, y) max(x, y)
#define fi first
#define se second
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
#define ll long long
#define pob pop_back
#define all(x) x.begin(),x.end()
#define vii vector<int>
#define int long long
#define getbit(i, j) (i >> j) & 1
#define offbit(i, j) (1 << j) ^ i
#define onbit(i, j) (1 << j)  i
#define built(mask) __builtin_popcountll(mask)
#define len(s) (int)((s).size())
#define iii pair<int,pair<int, int> >
#define fillcharval(a) memset(a, -0x3f, sizeof(a));
#define fillchar(a,x) memset(a, x, sizeof (a))
#define faster ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
const int N = 1e6 + 6;
const int mod = 1e9 + 7;
const int base = 31;
const int inf = 1e9;
void add(ll &x, const ll y){
    x+= y;
    if(x>=mod) x-= mod;
}
int n, m;
int a[20];
int b[20];
pii dp[1<<20];
pii Max(pii x, pii y){
    if(x.fi > y.fi) return x;
    if(x.fi < y.fi) return y;
    return {x.fi, max(x.se, y.se)};
}
signed main()
{
    faster
//    in("task.inp");
//    out("task.out");
    cin >> n >> m;
    fo(i, 0, n - 1) cin >> a[i];
    fo(i, 0, m - 1) cin >> b[i];
    dp[0] = {0, 0};
    fo(mask, 1, (1<<m) - 1){
        fo(i, 0, m - 1){
            if(getbit(mask, i)){
                pii pre_mask = dp[offbit(mask, i)];
                if(pre_mask.se + b[i] < a[pre_mask.fi]){
                    dp[mask] = Max(dp[mask], {pre_mask.fi, pre_mask.se + b[i]});
//                    cout << mask << "\n";
//                    cout << dp[mask].fi << " " << dp[mask].se << "\n";
//                    cout << pre_mask.fi << " " << pre_mask.se + b[i] << "\n";
                }
                else if(pre_mask.se + b[i] == a[pre_mask.fi]) dp[mask] = Max(dp[mask], {pre_mask.fi + 1, 0});
            }
        }
        if(dp[mask].fi == n) return cout << "YES", 0;
    }
    cout << "NO";
    return 0;
}

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