Submission #1237567

#	Time	Username	Problem	Language	Result	Execution time	Memory
1237567		Geforgs	Snake Escaping (JOI18_snake_escaping)	C++20	12 / 100	2095 ms	25736 KiB

snake_escaping

#include <iostream>
#include <iomanip>
#include <vector>
#include <cmath>
#include <algorithm>
#include <set>
#include <queue>
#include <map>
#include <unordered_map>
#include <stack>
#include <bitset>
#include <string>
#include <cstring>
#include <iterator>
#include <random>
#define ll long long
#define ld long double
#define inf (ll)(2*1e18)
#define sort(a) sort(a.begin(), a.end())
#define reverse(a) reverse(a.begin(), a.end())
#define pb push_back
#define endl "\n"
using namespace std;

void solve(){
    ll l, q, n, i, j, mask, s1, s2, res=0;
    char x;
    cin>>l>>q;
    n = (1<<l);
    vector<ll> a(n);
    vector<ll> b(n);
    vector<ll> c(n);
    for(i=0;i<n;++i){
        cin>>x;
        a[i] = x - '0';
        b[i] = a[i];
        c[(n-1)^i] = a[i];
    }
    for(i=0;i<l;++i){
        for(mask=0;mask<n;++mask){
            if(mask&(1<<i)){
                b[mask] += b[mask^(1<<i)];
                c[mask] += c[mask^(1<<i)];
            }
        }
    }
    for(i=0;i<q;++i){
        s1 = 0;
        s2 = 0;
        for(j=l-1;j>=0;--j){
            cin>>x;
            if(x == '1'){
                s1 += (1<<j);
            }else if(x == '?'){
                s2 += (1<<j);
            }
        }
        res = 0;
        for(mask=s1;mask>0;mask=(mask-1)&s1){
            if(__builtin_popcountll(mask^s1)&1){
                res -= b[s2|mask];
            }else{
                res += b[s2|mask];
            }
        }
        if(__builtin_popcountll(mask^s1)&1){
            res -= b[s2|mask];
        }else{
            res += b[s2|mask];
        }
        cout<<res<<endl;
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    srand(time(nullptr));
    ll t=1;
//    cin>>t;
    for(;t>0;--t){
        solve();
    }
    return 0;
}

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