제출 #648152

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
648152		jcelin	Paths (BOI18_paths)	C++14	100 / 100	426 ms	57728 KiB

paths

#include <bits/stdc++.h>
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef unsigned int ui;

#define ii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vii vector<ii>
#define vll vector<ll>
#define vpll vector<pll>
#define matrix vector<vi>
#define matrixLL vector<vll>
#define vs vector<string>
#define vui vector<ui>
#define msi multiset<int>
#define mss multiset<string>
#define si set<int>
#define ss set<string>
#define PB push_back
#define PF push_front
#define PPB pop_back
#define PPF pop_front
#define X first
#define Y second
#define MP make_pair
#define FOR(i, a, b) for (int i = int(a); i < int(b); i++)
#define REP(i, n) FOR(i, 0, n)
#define all(x) (x).begin(), (x).end()

const int dx[] = {-1, 1, 0, 0};
const int dy[] = {0, 0, -1, 1};
const int dxx[] = {-1, 1, 0, 0, 1, 1, -1, -1};
const int dyy[] = {0, 0, -1, 1, -1, 1, -1, 1};
const string abc="abcdefghijklmnopqrstuvwxyz";
const string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const ld pi = 3.14159265;
const int mod = 1e9 + 7;
const int MOD = 1e9 + 7;
const int MAXN = 3e5 + 7;
const int inf = mod;
const ll INF = 1e18;
const ll zero = ll(0);
const int logo = 5;
const int off = 1 << logo;
const int trsz = off << 1;

ll n, m, k;
ll arr[MAXN], dp[off][MAXN], ans;

vi g[MAXN];

void solve(){
	cin >> n >> m >> k;
	for(int i = 1; i <= n; i++) cin >> arr[i], arr[i]--;
	for(int i = 1, a, b; i <= m; i++) cin >> a >> b, g[a].PB(b), g[b].PB(a);
	
	for(ll x = 1; x < (1 << k); x++) for(ll i = 1; i <= n; i++){
		if(x & (1 << arr[i]) == 0) continue;
		ll j = (1 << arr[i]);
		if(j == x) dp[x][i] = 1;
		for(auto &y : g[i]) dp[x][i] += dp[x ^ j][y];
		ans += dp[x][i];
	}
	cout << ans - n << "\n";
}


int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int t=1;
	//cin >> t;
	while(t--)solve();
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

paths.cpp: In function 'void solve()':
paths.cpp:65:24: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   65 |   if(x & (1 << arr[i]) == 0) continue;
      |          ~~~~~~~~~~~~~~^~~~

• Subtask 1: 23 / 23
• Subtask 2: 20 / 20
• Subtask 3: 27 / 27
• Subtask 4: 30 / 30