/*
-------------- | /
| | /
| | /
| * |/ | | ------ *
| | | | / \
| | |\ | | | |\ |
\ | | | \ | | | | \ |
\ | | | \ | | \ / \ |
V | | \ \__/| ----- \ |
*/
#include <bits/stdc++.h>
using namespace std;
#define debug(x) cerr << "\e[1;31m" << #x << " = " << (x) << "\e[0m\n"
#define print(x) emilia_mata_tenshi(#x, begin(x), end(x))
template<typename T> void emilia_mata_tenshi(const char *s, T l, T r) {
cerr << "\e[1;33m" << s << " = [";
while(l != r) {
cerr << *l;
cerr << (++l == r ? ']' : ',');
}
cerr << "\e[0m\n";
}
#define EmiliaMyWife ios::sync_with_stdio(0); cin.tie(NULL);
using ll = int64_t;
using ull = uint64_t;
using ld = long double;
using uint = uint32_t;
const double EPS = 1e-8;
const int INF = 0x3F3F3F3F;
const ll LINF = 4611686018427387903;
const int MOD = 1e9+7;
static int Lamy_is_cute = []() {
EmiliaMyWife
return 48763;
}();
/*--------------------------------------------------------------------------------------*/
const int N = 2e6 + 25;
int arr[N], dp[N], dp2[N];
int dfs(const string &s, int n, int cur) {
if(n == l)
return arr[cur];
if(s[n] == '?')
return dfs(s, n + 1, cur) + dfs(s, n + 1, cur | (1 << n));
if(s[n] == '1')
return dfs(s, n + 1, cur | (1 << n));
return dfs(s, n + 1, cur);
}
int dfs2(const string &s, int n, int cur, int cnt) {
if(n == l)
return dp[cur] * (cnt % 2 ? -1 : 1);
if(s[n] == '?')
return dfs2(s, n + 1, cur | (1 << n), cnt);
if(s[n] == '0')
return dfs2(s, n + 1, cur, cnt);
return dfs2(s, n + 1, cur | (1 << n), cnt) + dfs2(s, n + 1, cur, cnt + 1);
}
int dfs3(const string &s, int n, int cur, int cnt) {
if(n == l)
return dp2[cur] * (cnt % 2 ? -1 : 1);
if(s[n] == '?')
return dfs3(s, n + 1, cur, cnt);
if(s[n] == '1')
return dfs3(s, n + 1, cur | (1 << n), cnt);
return dfs3(s, n + 1, cur | (1 << n), cnt + 1) + dfs3(s, n + 1, cur, cnt);
}
signed main() {
int l, q;
cin >> l >> q;
{
string s;
cin >> s;
for(int i = 0; i < (1 << l); i++)
arr[i] = dp[i] = dp2[i] = s[i] - '0';
}
for(int i = 0; i < l; i++)
for(int j = 0; j < (1 << l); j++)
if(j >> i & 1)
dp[j] += dp[j ^ (1 << i)];
for(int i = 0; i < l; i++)
for(int j = 0; j < (1 << l); j++)
if(j >> i & 1 ^ 1)
dp2[j] += dp2[j ^ (1 << i)];
while(q--) {
string s;
cin >> s;
reverse(s.begin(), s.end());
int cnt = 0, cnt2 = 0;
for(char c : s) {
cnt += c == '?';
cnt2 += c == '1';
}
int cnt3 = l - (cnt + cnt2);
if(cnt <= min(cnt3, cnt2))
cout << dfs(s, 0, 0) << '\n';
else if(cnt2 <= min(cnt, cnt3))
cout << dfs2(s, 0, 0, 0) << '\n';
else
cout << dfs3(s, 0, 0, 0) << '\n';
}
}
Compilation message
snake_escaping.cpp: In function 'int dfs(const string&, int, int)':
snake_escaping.cpp:43:10: error: 'l' was not declared in this scope
43 | if(n == l)
| ^
snake_escaping.cpp: In function 'int dfs2(const string&, int, int, int)':
snake_escaping.cpp:52:10: error: 'l' was not declared in this scope
52 | if(n == l)
| ^
snake_escaping.cpp: In function 'int dfs3(const string&, int, int, int)':
snake_escaping.cpp:61:10: error: 'l' was not declared in this scope
61 | if(n == l)
| ^
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:85:14: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
85 | if(j >> i & 1 ^ 1)
| ~~~~~~~^~~
