Submission #330190

#	Time	Username	Problem	Language	Result	Execution time	Memory
330190		casperwang	Snake Escaping (JOI18_snake_escaping)	C++14	12 / 100	2095 ms	8080 KiB

snake_escaping

#include <bits/stdc++.h>
using namespace std;

const int L = 20;
int n, q;
string str;
int val[1<<L];
int ans;

signed main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
  cin >> n >> q;
  cin >> str;
  for (int i = 0; i < (1<<n); i++)
    val[i] = str[i] - '0';
  for (int i = 0; i < q; i++) {
    cin >> str;
    int a = 0, b = 0;
    for (int j = 0; j < n; j++) {
      if (str[j] == '?')
        a = a*2, b = b*2+1;
      else if (str[j] == '0')
        a = a*2, b = b*2;
      else 
        a = a*2+1, b = b*2+1;
    }
    ans = val[a];
    int t = a^b;
    for (int j = t; j; j=(j-1)&t) {
      ans += val[a|j];
    }
    cout << ans << "\n";
  }
}

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