Submission #890296

#	Time	Username	Problem	Language	Result	Execution time	Memory
890296		ByeWorld	Bank (IZhO14_bank)	C++14	19 / 100	4 ms	10788 KiB

bank

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,unroll-loops")
#define bupol __builtin_popcount
#define int long long 
#define ll long long
#define ld long double
#define fi first
#define se second
#define pb push_back
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
const int MAXN = 2e6+20;
const int LOG = 20;
const int MOD = 1e9+7;
const int SQRT = 520;
const int INF = 1e18;
typedef pair<int,int> pii;
typedef pair<int,pii> ipii;

int n, m;
int a[25], b[25];
int dp[25][MAXN];

signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> m;
    for(int i=1; i<=n; i++) cin >> a[i];
    for(int i=0; i<m; i++) cin >> b[i];

    dp[0][0] = 1;
    for(int i=1; i<=n; i++){
        for(int j=0; j<(1<<m); j++){
            if(dp[i-1][j]==0) continue;
            int num = (1<<m)-1-j; // bit yg bisa dipake

            vector <int> vec;
            for(int k=0; k<m; k++){
                if((num>>k) & 1) vec.pb(b[k]);
            }
            //for(auto in : vec) cout << in << " vec\n";

            vector <pii> v1, v2;

            int cnt = (int)vec.size(), bit = cnt/2;
            for(int y=0; y<(1<<bit); y++){
                int val = 0;
                for(int x=0; x<bit; x++){
                    if((y>>x) & 1) val += vec[x];
                }
                v1.pb({val, y});
            }

            bit = cnt-bit;
            for(int y=0; y<(1<<bit); y++){
                int val = 0;
                for(int x=0; x<bit; x++){
                    if((y>>x) & 1) val += vec[cnt/2+x];
                }
                v2.pb({val, y});
            }
            sort(v1.begin(), v1.end()); sort(v2.begin(), v2.end());
            //for(auto in : v1) cout << in.fi << ' ' << in.se << " v1\n";
            //for(auto in : v2) cout << in.fi << ' ' << in.se << " v2\n";

            for(auto in : v1){
                int te = in.fi;
                auto it = lower_bound(v2.begin(), v2.end(), pii(a[i]-te, -1));
                while(it!=v2.end() && (*it).fi == a[i]-te){
                    int num = j + in.se + ((*it).se << (cnt/2));
                    dp[i][num] = 1;
                    //cout<< i << ' ' << num << " num\n";
                    it++;
                }
            }
        }
    }
    bool ans = 0;
    for(int i=0; i<(1<<m); i++) ans |= dp[n][i];
    cout << (ans ? "YES\n" : "NO\n");
}

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