Submission #1263475

#TimeUsernameProblemLanguageResultExecution timeMemory
1263475rafamiunePark (BOI16_park)C++20
0 / 100
2592 ms628 KiB
#include <bits/stdc++.h>
using namespace std;
#define fr first 
#define sc second
#define int long long
#define all(x) (x).begin(), (x).end()
const int maxn = 2e3 + 5;
const long long inf = 1e18 + 5;

int n, w, h;
bool N, S, E, W;
vector<int> x(maxn), y(maxn), r(maxn), mark(maxn);

void dfs(int v, int radius) {
    if(mark[v]) return;
    mark[v] = 1;

    if ((x[v] - r[v]) <= 2 * radius) W = 1;
    if ((w - x[v] - r[v]) <= 2 * radius) E = 1;
    if ((y[v] - r[v]) <= 2 * radius) S = 1;
    if ((h - y[v] - r[v]) <= 2 * radius) N = 1;

    for(int i = 1; i <= n; i++) {
        if(mark[i]) continue; 
        __int128 dx = x[i] - x[v], dy = y[i] - y[v];
        __int128 dist2 = dx*dx + dy*dy;
        __int128 sum = r[v] + r[i] + 2*radius;
        if(dist2 <= sum*sum) {
            dfs(i, radius);
        }
    }
}

void solve(int radius, int exit) {
    for(int i = 1; i <= n; i++) mark[i] = 0; 
    bool ok1 = 1, ok2 = 1, ok3 = 1, ok4 = 1;

    for(int i = 1; i <= n; i++) {
        if(mark[i]) continue; 
        N = 0; S = 0; W = 0; E = 0;
        dfs(i, radius);

        if (exit == 1) {
            if (W && N) { ok4 = 0; }
            if (W && E) { ok4 = 0; ok3 = 0; }
            if (W && S) { ok4 = 0; ok3 = 0; ok2 = 0; }
            if (S && N) { ok2 = 0; ok3 = 0; }
            if (S && E) { ok2 = 0; }
            if (N && E) { ok3 = 0; }
        }
        else if (exit == 2) {
            if (W && N) { ok4 = 0; }
            if (W && E) { ok4 = 0; ok3 = 0; }
            if (W && S) { ok1 = 0; }
            if (S && N) { ok1 = 0; ok4 = 0; }
            if (S && E) { ok1 = 0; ok3 = 0; ok4 = 0; }
            if (N && E) { ok3 = 0; }
        }
        else if (exit == 3) {
            if (W && N) { ok4 = 0; }
            if (W && E) { ok1 = 0; ok2 = 0; }
            if (W && S) { ok1 = 0; }
            if (S && N) { ok4 = 0; ok1 = 0; }
            if (S && E) { ok2 = 0; }
            if (N && E) { ok1 = 0; ok2 = 0; ok4 = 0; }
        }
        else if (exit == 4) {
            if (W && N) { ok1 = 0; ok2 = 0; ok3 = 0; }
            if (W && E) { ok1 = 0; ok2 = 0; }
            if (W && S) { ok1 = 0; }
            if (S && N) { ok2 = 0; ok3 = 0; }
            if (S && E) { ok2 = 0; }
            if (N && E) { ok3 = 0; }
        }
    }

    if(ok1) cout << 1;
    if(ok2) cout << 2;
    if(ok3) cout << 3;
    if(ok4) cout << 4;
    cout << "\n";
}

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    int m;
    cin >> n >> m >> w >> h;
    for(int i = 1; i <= n; i++) {
        cin >> x[i] >> y[i] >> r[i];
    }
    while(m--) {
        int a, b;
        cin >> a >> b;
        solve(a, b);
    }

    return 0;
}
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