3169

src/3169.c

@@ -0,0 +1,42 @@
+//
+// Created by gint on 2025/7/11.
+//
+#include <solution/3169.h>
+#include <stdio.h>
+#include <stdlib.h>
+int cmpMeetings(const void *a, const void *b)
+{
+    int *ma = *(int **)a;
+    int *mb = *(int **)b;
+    if (ma[0] != mb[0])
+        return ma[0] - mb[0];
+    return ma[1] - mb[1];
+}
+
+void mergeMeeting(int *meetingA, int *meetingB)
+{
+    meetingA[0] = meetingA[0] < meetingB[0] ? meetingA[0] : meetingB[0];
+    meetingA[1] = meetingA[1] > meetingB[1] ? meetingA[1] : meetingB[1];
+}
+
+int countDays(int days, int **meetings, int meetingsSize, int *meetingsColSize)
+{
+    int count = 0;
+    qsort(meetings, meetingsSize, sizeof(int *), cmpMeetings);
+
+    for (int i = 1; i < meetingsSize; i++)
+        if (meetings[i - 1][1] >= meetings[i][0])
+            mergeMeeting(meetings[i], meetings[i - 1]);
+
+    for (int i = 1; i < meetingsSize; i++)
+        if (meetings[i - 1][0] != meetings[i][0])
+            count += meetings[i][0] - meetings[i - 1][1] - 1;
+
+    if (meetings[0][0] != 1)
+        count += meetings[0][0] - 1;
+
+    if (meetings[meetingsSize - 1][1] < days)
+        return count + days - meetings[meetingsSize - 1][1];
+
+    return count;
+}