Submission #702994

#	Time	Username	Problem	Language	Result	Execution time	Memory
702994		Hanksburger	Park (BOI16_park)	C++17	100 / 100	353 ms	50884 KiB

park

#include <bits/stdc++.h>
#define ll long long
using namespace std;
vector<pair<double, pair<ll, ll> > > vec;
ll x[2005], y[2005], r[2005], par[4005];
pair<pair<ll, ll>, ll> a[100005];
bool ans[100005][5];
ll p(ll u)
{
    return par[u]==u?u:(par[u]=p(par[u]));
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    ll n, m, w, h, ind=0;
    cin >> n >> m >> w >> h;
    for (ll i=1; i<=n; i++)
    {
        cin >> x[i] >> y[i] >> r[i];
        for (ll j=1; j<i; j++)
            vec.push_back({sqrt((x[i]-x[j])*(x[i]-x[j])+(y[i]-y[j])*(y[i]-y[j]))-r[i]-r[j], {i, j}});
        vec.push_back({x[i]-r[i], {i, n*2}});
        vec.push_back({y[i]-r[i], {i, n*2+1}});
        vec.push_back({w-x[i]-r[i], {i, n*2+2}});
        vec.push_back({h-y[i]-r[i], {i, n*2+3}});
    }
    for (ll i=1; i<=m; i++)
    {
        cin >> a[i].first.first >> a[i].first.second;
        a[i].second=i;
    }
    sort(vec.begin(), vec.end());
    sort(a+1, a+m+1);
    n*=2;
    for (ll i=1; i<=n+3; i++)
        par[i]=i;
    for (ll i=1; i<=m; i++)
    {
        while (ind<vec.size() && vec[ind].first<a[i].first.first*2)
        {
            par[p(vec[ind].second.first)]=p(vec[ind].second.second);
            ind++;
        }
        ll b=a[i].first.second-1, c=a[i].second;
        ans[c][b]=1;
        ans[c][(b+3)%4]=(p(n+b)!=p(n+(b+1)%4) && p(n+b)!=p(n+(b+2)%4) && p(n+b)!=p(n+(b+3)%4));
        ans[c][(b+1)%4]=(p(n+(b+1)%4)!=p(n+b) && p(n+(b+1)%4)!=p(n+(b+2)%4) && p(n+(b+1)%4)!=p(n+(b+3)%4));
        ans[c][(b+2)%4]=(p(n+(b+1)%4)!=p(n+b) && p(n+(b+1)%4)!=p(n+(b+3)%4) && p(n+(b+2)%4)!=p(n+b) && p(n+(b+2)%4)!=p(n+(b+3)%4));
    }
    for (ll i=1; i<=m; i++)
    {
        for (ll j=0; j<=3; j++)
            if (ans[i][j])
                cout << j+1;
        cout << '\n';
    }
}

Compilation message (stderr)

park.cpp: In function 'int main()':
park.cpp:41:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<double, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         while (ind<vec.size() && vec[ind].first<a[i].first.first*2)
      |                ~~~^~~~~~~~~~~

• Subtask 1: 27 / 27
• Subtask 2: 31 / 31
• Subtask 3: 42 / 42