Submission #714741

#	Time	Username	Problem	Language	Result	Execution time	Memory
714741		aykhn	Stranded Far From Home (BOI22_island)	C++14	0 / 100	9 ms	596 KiB

island

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define OPT ios_base::sync_with_stdio(0); \
            cin.tie(0); \
            cout.tie(0)

#define pii pair<int,int>
#define pll pair<ll,ll>
#define endl "\n"
#define all(v) v.begin(), v.end()
#define mpr make_pair
#define pb push_back
#define ts to_string
#define fi first
#define se second
#define inf 0x3F3F3F3F
#define bpc __builtin_popcount
#define print(v) for(int i = 0; i < v.size(); i++) \
                    cout << v[i] << " "; \
                    cout<<endl;

/*
int ternarySearch(int l, int r, int key, int ar[])
{
    if (r >= l)
    {
        int mid1 = l + (r - l) / 3;
        int mid2 = r - (r - l) / 3;

        if (ar[mid1] == key) {
            return mid1;
        }
        if (ar[mid2] == key) {
            return mid2;
        }
        if (key < ar[mid1]) {
            return ternarySearch(l, mid1 - 1, key, ar);
        }
        else if (key > ar[mid2]) {
            return ternarySearch(mid2 + 1, r, key, ar);
        }
        else {
            return ternarySearch(mid1 + 1, mid2 - 1, key, ar);
        }
    }
    return -1;
}
*/

struct DSU {
	vector<int> e;

	void init(int n)
	{
	    e.assign(n, -1);
	}

	int get(int x)
	{
	    if (e[x] < 0)
            return x;
        return e[x] = get(e[x]);
	}

	bool together(int a, int b)
	{
	    return get(a) == get(b);
    }

	int s(int x)
	{
	    return -e[get(x)];
    }

	bool unite(int x, int y)
	{
		x = get(x);
        y = get(y);

		if (x == y) return false;

		if (e[x] > e[y]) swap(x, y);

		e[x] += e[y];
		e[y] = x;

		return true;
	}
};

vector<bool> used(2001);
vector<ll> v(2001);
vector<vector<ll>> adj(2001);

void dfs(int a, int &cnt)
{
    cnt += v[a];
    used[a] = true;

    for (int i = 0; i < adj[a].size(); i++)
    {
        if (v[adj[a][i]] <= cnt && !used[adj[a][i]])
        {
            dfs(adj[a][i], cnt);
        }
    }
}
int main()
{
    ll n, m;
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
    {
        cin >> v[i];
    }


    while (m--)
    {
        ll u, v;
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
    }

    string s;

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++) used[j] = 0;
        int cnt = 0;
        dfs(i, cnt);
        bool f = 1;

        for (int j = 1; j <= n; j++)
        {
            if (!used[j])
            {
                f = 0;
                break;
            }
        }

        if (f) s.pb('1');
        else s.pb('0');
    }
    cout << s << endl;
}

Compilation message (stderr)

island.cpp: In function 'void dfs(int, int&)':
island.cpp:104:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |     for (int i = 0; i < adj[a].size(); i++)
      |                     ~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 35