Submission #1306003

#	Time	Username	Problem	Language	Result	Execution time	Memory
1306003		dobri_oke	Snake Escaping (JOI18_snake_escaping)	C++20	Compilation error	0 ms	0 KiB

snake_escaping

#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define pb push_back
#define F first
#define S second

const int N = (1 << 20) + 5, inf = 1e9 + 1, mod = 1e9 + 7;
int n, q, dp[N], c[N];
string s;
void solve(){
    cin >> n >> q >> s;
    for(int i = 0; i < (1 << n); i++){
        c[i] = s[i] - '0';
        dp[i] = c[i];
    }
    for(int i = 0; i < n; i++){
        for(int mask = 0; mask < (1 << n); mask++){
            if(((mask >> i) & 1) == 0){
                dp[mask] += dp[(mask | (1 << i))];
            }
        }
    }
    while(q--){
        string d;
        cin >> d;
        int g = 0, h = 0, f = 0, cnt = 0, cnt2 = 0, sum = 0;
        for(int i = 0; i < n; i++){
            if(d[n - i - 1] == '1') g += (1 << i);
            else if(d[n - i - 1] == '0'){ h += (1 << i); cnt++;}
            else{ f += (1 << i); cnt2++;}
        }
        if(cnt < cnt2){
            for(int mask = h; ; mask = ((mask - 1) & h)){
                int i = __builtin_popcaount(mask);
                if(i % 2 == 1) sum -= dp[(g | mask)];
                else sum += dp[(g | mask)];
                if(mask == 0) break;
            }
        }
        else{
            for(int mask = f; ; mask = ((mask - 1) & f)){
                sum += c[(g | mask)];
                if(mask == 0) break;
            }
        }
        cout << sum << '\n';
    }
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    //freopen("guard.in", "r", stdin);
    //freopen("guard.out", "w", stdout);
    int tt = 1;
    //cin >> tt;
    while(tt--) solve();
}

Compilation message (stderr)

snake_escaping.cpp: In function 'void solve()':
snake_escaping.cpp:35:25: error: '__builtin_popcaount' was not declared in this scope; did you mean '__builtin_popcount'?
   35 |                 int i = __builtin_popcaount(mask);
      |                         ^~~~~~~~~~~~~~~~~~~
      |                         __builtin_popcount