Submission #1127163

#	Time	Username	Problem	Language	Result	Execution time	Memory
1127163		Zbyszek99	Snake Escaping (JOI18_snake_escaping)	C++20	75 / 100	2093 ms	34180 KiB

snake_escaping

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define ull unsigned long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
//mt19937 mt;void random_start(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll rand(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

ll SOS[(1 << 20)];
ll odwSOS[(1 << 20)];
ll cost[(1 << 20)];
int odw_mask;
int l,q;

ll ans0(string s)
{
    int mask = 0;
    vi zeros;
    rep(i,l)
    {
        if(s[i] != '1') 
        {
            mask += (1 << i);
        }
        if(s[i] == '0') zeros.pb(i);
    }
    ll ans = odwSOS[mask];
    rep2(mask2,1,(1 << siz(zeros))-1)
    {
        int new_mask = mask;
        rep(i,siz(zeros))
        {
            if(mask2 & (1 << i)) new_mask -= (1 << zeros[i]);
        }
        if(count_bits(mask2) & 1)
        {
            ans -= odwSOS[new_mask];
        }
        else
        {
            ans += odwSOS[new_mask];
        }
    }
    return ans;
}

ll ans1(string s)
{
    int mask = 0;
    vi ones;
    rep(i,l)
    {
        if(s[i] != '0') 
        {
            mask += (1 << i);
        }
        if(s[i] == '1') ones.pb(i);
    }
    ll ans = SOS[mask];
    rep2(mask2,1,(1 << siz(ones))-1)
    {
        int new_mask = mask;
        rep(i,siz(ones))
        {
            if(mask2 & (1 << i)) new_mask -= (1 << ones[i]);
        }
        if(count_bits(mask2) & 1)
        {
            ans -= SOS[new_mask];
        }
        else
        {
            ans += SOS[new_mask];
        }
    }
    return ans;
}

ll ansp(string s)
{
    ll ans = 0;
    vi p;
    int mask = 0;
    rep(i,l) 
    {
        if(s[i] == '?') p.pb(i);
        if(s[i] == '1') mask += (1 << i);
    }
    rep(mask2,(1 << siz(p)))
    {
        int new_mask = mask;
        rep(i,l)
        {
            if(mask2 & (1 << i))
            {
                new_mask += (1 << p[i]);
            }
        }
        ans += cost[new_mask];
    }
    return ans;
}


int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    //random_start();
    string s;
    cin >> l >> q >> s;
    odw_mask = (1 << l)-1;
    rep(i,(1 << l))
    {
        cost[i] = s[i] - '0';
        SOS[i] = s[i] - '0';
        odwSOS[i^odw_mask] = s[i] - '0';
    }
    rep(bit,l)
    {
        rep(mask,(1 << l))
        {
            if(mask & (1 << bit))
            {
                SOS[mask] += SOS[mask-(1 << bit)];
                odwSOS[mask] += odwSOS[mask-(1 << bit)];
            }
        }
    }
    rep(qq,q)
    {
        string query;
        cin >> query;
        reverse(all(query));
        int count0 = 0;
        int count1 = 0;
        int countp = 0;
        rep(i,l)
        {
            if(query[i] == '0') count0++;
            else if(query[i] == '1') count1++;
            else countp++;
        }
        if(count0 <= count1 && count0 <= countp)
        {
            cout << ans0(query) << "\n";
            continue;
        }
        if(count1 <= count0 && count1 <= countp)
        {
            cout << ans1(query) << "\n";
            continue;
        }
        if(countp <= count1 && countp <= count0)
        {
            cout << ansp(query) << "\n";
            continue;
        }
    }
}

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 10 / 10
• Subtask 4: 53 / 53
• Subtask 5: 0 / 25