C - Choose Elements

https://atcoder.jp/contests/abc245/submissions/30450954

AtCoder/ABC245/C/C.cpp

@@ -0,0 +1,36 @@
+#include <cmath>
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 2e5 + 5;
+
+int n, k, a[N], b[N], f[N][2];
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    cin >> n >> k;
+    for (int i = 1; i <= n; i++) {
+        cin >> a[i];
+    }
+    for (int i = 1; i <= n; i++) {
+        cin >> b[i];
+    }
+
+    f[1][0] = f[1][1] = 1;
+    for (int i = 2; i <= n; i++) {
+        f[i][0] |= ((std::abs(a[i] - a[i - 1]) <= k && f[i - 1][0]) || (std::abs(a[i] - b[i - 1]) <= k && f[i - 1][1]));
+        f[i][1] |= ((std::abs(b[i] - a[i - 1]) <= k && f[i - 1][0]) || (std::abs(b[i] - b[i - 1]) <= k && f[i - 1][1]));
+    }
+
+    if (f[n][0] | f[n][1]) {
+        cout << "Yes" << endl;
+    } else {
+        cout << "No" << endl;
+    }
+
+    return 0;
+}