solved a2p3

MAIN8_C/MAIN8_C.cpp

@@ -0,0 +1,56 @@
+#include <cstdio>
+#include <iostream>
+#include <climits>
+
+#define MAX_BOXES 50000
+
+bool check_candies(int boxes[], int mid, int student_count, int box_count) {
+    for (int i = 0; i < box_count; ++i) {
+        student_count -= boxes[i] / mid;
+        if (student_count < 1)
+            return true;
+    }
+    return false;
+}
+
+
+// O(log n)
+int main() {
+    int t;
+    std::scanf("%d", &t);
+
+    int boxes[MAX_BOXES];
+
+    while (t--) {
+        int n, k;
+
+        std::scanf("%d %d", &n, &k);
+
+        int largest = INT_MIN;
+
+        for (int i = 0; i < n; i++) {
+            std::scanf("%d", &boxes[i]);
+
+            if (boxes[i] > largest)
+                largest = boxes[i];
+        }
+
+        int low = 0;
+        int high = largest;
+
+        while (low < high) {
+            int mid = low + (high - low + 1) / 2;
+
+            if (check_candies(boxes, mid, k, n)) {
+                low = mid;
+            } else {
+                high = mid - 1;
+            }
+        }
+
+        std::printf("%d\n", low);
+    }
+
+    return 0;
+}
+