更新

作业/刘航宇-day45/第三题/P2975.java

@@ -0,0 +1,39 @@
+import java.util.*;
+
+public class P2975 {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        StringBuilder all = new StringBuilder();
+        if (in.hasNextLine()) {
+            all.append(in.nextLine());
+            while (in.hasNextLine()) {
+                all.append('\n');
+                all.append(in.nextLine());
+            }
+        }
+        Map<Character, Integer> cnt = new HashMap<>();
+        for (int i = 0; i < all.length(); i++) {
+            char c = all.charAt(i);
+            if (c == '\r' || c == '\n') continue;
+            cnt.put(c, cnt.getOrDefault(c, 0) + 1);
+        }
+        char bestChar = 0;
+        int best = -1;
+        for (Map.Entry<Character, Integer> e : cnt.entrySet()) {
+            char c = e.getKey();
+            int v = e.getValue();
+            if (v > best || (v == best && c < bestChar)) {
+                best = v;
+                bestChar = c;
+            }
+        }
+        if (best < 0) {
+            System.out.println();
+            System.out.println(0);
+        } else {
+            System.out.println(bestChar);
+            System.out.println(best);
+        }
+        in.close();
+    }
+}