Submission #4650151

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Source Code Expand

#include "bits/stdc++.h"

#define REP(i,n) for(ll i=0;i<ll(n);++i)
#define RREP(i,n) for(ll i=ll(n)-1;i>=0;--i)
#define FOR(i,m,n) for(ll i=m;i<ll(n);++i)
#define RFOR(i,m,n) for(ll i=ll(n)-1;i>=ll(m);--i)
#define ALL(v) (v).begin(),(v).end()
#define UNIQUE(v) v.erase(unique(ALL(v)),v.end());
#define INF 1000000001ll
#define MOD 1000000007ll
#define EPS 1e-9

constexpr int dx[8] = { 1,1,0,-1,-1,-1,0,1 };
constexpr int dy[8] = { 0,1,1,1,0,-1,-1,-1 };


using namespace std;

using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;
using vvi = vector<vi>;
using vvl = vector<vl>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

template <class T> bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; }
template <class T> bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; }
map<int, pii> mp;
vvi v(5, vi(5));
int dfs(vi &dp, int b) {
	if (dp[b] != -1)return dp[b];
	int num = __bultin_popcount(b);
	int ret = 0;
	if (mp.count(num + 1)) {
		int x, y;
		tie(x, y) = mp[num + 1];
		bool ok = true;
		if (x != 0 && x != 4) {
			int cnt = 0;
			int k = (x - 1) * 5 + y;
			if (b&(1 << k))cnt++;
			k = (x + 1) * 5 + y;
			if (b&(1 << k))cnt++;
			if (cnt & 1)ok = false;
		}
		if (y != 0 && y != 4) {
			int cnt = 0;
			int k = x * 5 + y - 1;
			if (b&(1 << k))cnt++;
			k = x * 5 + y + 1;
			if (b&(1 << k))cnt++;
			if (cnt & 1)ok = false;
		}
		if (ok) {
			int k = 5 * x + y;
			ret += dfs(dp, b | (1 << k));
			ret %= MOD;
		}
		
	}
	else {
		REP(x, 5)REP(y, 5) {
			int k = 5 * x + y;
			if (b&(1 << k) || v[x][y] != 0)continue;
			bool ok = true;
			if (x != 0 && x != 4) {
				int cnt = 0;
				int k = (x - 1) * 5 + y;
				if (b&(1 << k))cnt++;
				k = (x + 1) * 5 + y;
				if (b&(1 << k))cnt++;
				if (cnt & 1)ok = false;
			}
			if (y != 0 && y != 4) {
				int cnt = 0;
				int k = x * 5 + y - 1;
				if (b&(1 << k))cnt++;
				k = x * 5 + y + 1;
				if (b&(1 << k))cnt++;
				if (cnt & 1)ok = false;
			}
			if (ok) {
				int k = 5 * x + y;
				ret += dfs(dp, b | (1 << k));
				ret %= MOD;
			}
		}
	}
	return dp[b] = ret;
}
int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	REP(i, 5)REP(j, 5) {
		cin >> v[i][j];
		if (v[i][j] != 0)mp[v[i][j]] = { i,j };

	}
	vi dp(1 << 25, -1);
	dp.back() = 1;
	dfs(dp, 0);
	cout << dp[0] << endl;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int dfs(vi&, int)’:
./Main.cpp:33:31: error: ‘__bultin_popcount’ was not declared in this scope
  int num = __bultin_popcount(b);
                               ^