P2074 危险区域

R42122741

problem/P2074/P2074.cpp

@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, m, k, t, x, y, ans, sum;
+
+int main() {
+    cin >> n >> m >> k >> t;
+    for (int i = 0; i < k; i++) {
+        sum = 0;
+        cin >> x >> y;
+        for (int i = max(1, x - t); i <= min(n, x + t); i++) {
+            for (int j = max(1, y - t); j <= min(m, y + t); j++) {
+                if (sqrt((x - i) * (x - i) + (y - j) * (y - j)) <= t) {
+                    sum++;
+                }
+            }
+        }
+        ans = max(ans, sum);
+    }
+    cout << ans << endl;
+    return 0;
+}