Submission #330178

#	Time	Username	Problem	Language	Result	Execution time	Memory
330178		casperwang	Snake Escaping (JOI18_snake_escaping)	C++14	5 / 100	2090 ms	5648 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;
    ans = 0;
    for (int j = 0; j < (1<<n); j++) {
      bool tf = 1;
      for (int k = 0; k < n && tf; k++) {
        if (str[n-1-k] == '?') continue;
        if (str[n-1-k]-'0' != ((1<<k)&(j))>0) tf = 0;
      }
      if (tf) ans += val[j];
    }
    cout << ans << "\n";
  }
}

Compilation message (stderr)

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:23:43: warning: suggest parentheses around comparison in operand of '!=' [-Wparentheses]
   23 |         if (str[n-1-k]-'0' != ((1<<k)&(j))>0) tf = 0;
      |                               ~~~~~~~~~~~~^~

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