Submission #1233602

#	Time	Username	Problem	Language	Result	Execution time	Memory
1233602		BuiDucManh123	Snake Escaping (JOI18_snake_escaping)	C++20	100 / 100	401 ms	21892 KiB

snake_escaping

#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define taskname ""
#define ld long double
const int mod = 1e9+7;
using namespace std;
int f[2000009], g[2000009], cnt[2000009];
signed main() {
    if (fopen(taskname".inp","r")) {
        freopen(taskname".inp","r",stdin);
        freopen(taskname".out","w",stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int l, q;
    cin >> l >> q;
    string s;
    cin >> s;
    for(int i = 0; i < (1 << l); i++){
        f[i] = s[i] - '0';
        g[i] = s[i] - '0';
    }
    for(int i = 0; i < l; i++){
        for(int mask = 0; mask < (1 << l); mask++){
            if((mask >> i) & 1){
                cnt[mask]++;
                f[mask] += f[mask ^ (1 << i)];
            }else{
                g[mask] += g[mask ^ (1 << i)];
            }
        }
    }
    while(q--){
        string t;
        cin >> t;
        int x = 0, y = 0, z = 0, cx = 0, cy = 0, cz = 0;
        for(int i = 0; i < t.size(); i++){
            if(t[i] == '0'){
                cx++;
                x += (1 << (l - 1 - i));
            }
            if(t[i] == '1'){
                cy++;
                y += (1 << (l - 1 - i));
            }
            if(t[i] == '?'){
                cz++;
                z += (1 << (l - 1 - i));
            }
        }
        int ans = 0;
        if(cy <= 6){
            ans += f[y | z];
            for(int i = y; i > 0; i = (i - 1) & y){
                if(cnt[i] & 1){
                    ans -= f[z | (y ^ i)];
                }else{
                    ans += f[z | (y ^ i)];
                }
            }
            cout << ans << "\n";
            continue;
        }
        if(cx <= 6){
            ans += g[y];
            for(int i = x; i > 0; i = (i - 1) & x){
                if(cnt[i] & 1){
                    ans -= g[y | i];
                }else{
                    ans += g[y | i];
                }
            }
            cout << ans << "\n";
            continue;
        }

        for(int i = z; i > 0; i = (i - 1) & z){
            ans += s[i | y] - '0';
        }
        ans += s[y] - '0';
        cout << ans << "\n";
    }
    return 0;
}

Compilation message (stderr)

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen(taskname".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(taskname".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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