diff --git a/src/apple.c b/src/apple.c
index 766d543..153880f 100644
--- a/src/apple.c
+++ b/src/apple.c
@@ -4,14 +4,42 @@ int n;
 int k;
 int A[100000];
 
+int p(int x)
+{
+  int sum = 0;
+  for (int i = 0; i < n; i++)
+  {
+    sum += (A[i] + x - 1) / x;
+  }
+  if (sum <= k)
+  {
+    return 1;
+  }
+  else
+    return 0;
+}
 
-int main(){
+int main()
+{
   int i, lb, ub;
   scanf("%d%d", &n, &k);
-  for(i = 0; i < n; i++){
+  for (i = 0; i < n; i++)
+  {
     scanf("%d", &A[i]);
   }
 
+  lb = 0;
+  ub = 1000000000;
+
+  while (ub - lb > 1)
+  {
+    int mid = (lb + ub) / 2;
+    if (p(mid) == 1)
+      ub = mid;
+    else
+      lb = mid;
+  }
 
+  printf("%d\n", ub);
   return 0;
 }
diff --git a/src/array.c b/src/array.c
index 13ed925..eef6aa1 100644
--- a/src/array.c
+++ b/src/array.c
@@ -4,15 +4,26 @@ int n;
 int k;
 int A[100000];
 
-
-int main(){
+int main()
+{
   int i, lb, ub;
   scanf("%d%d", &n, &k);
-  for(i = 0; i < n; i++){
+  for (i = 0; i < n; i++)
+  {
     scanf("%d", &A[i]);
   }
 
+  lb = -1;
+  ub = n;
+  while (ub - lb > 1)
+  {
+    int mid = (lb + ub) / 2;
+    if (A[mid] >= k)
+      ub = mid;
+    else
+      lb = mid;
+  }
 
-
+  printf("%d\n", ub);
   return 0;
-}
+}
\ No newline at end of file
diff --git a/src/spear.c b/src/spear.c
index 766d543..8da4e4f 100644
--- a/src/spear.c
+++ b/src/spear.c
@@ -4,14 +4,43 @@ int n;
 int k;
 int A[100000];
 
+int p(int x)
+{
+  int sum = 0;
+  for (int i = 0; i < n; i++)
+  {
+    sum += A[i] / x;
+  }
+  if (sum >= k)
+  {
+    return 1;
+  }
+  else
+    return 0;
+}
 
-int main(){
+int main()
+{
   int i, lb, ub;
   scanf("%d%d", &n, &k);
-  for(i = 0; i < n; i++){
+  for (i = 0; i < n; i++)
+  {
     scanf("%d", &A[i]);
   }
 
+  lb = 0;
+  ub = 1000000001;
+
+  while (ub - lb > 1)
+  {
+    int mid = (lb + ub) / 2;
+    if (p(mid) == 1)
+      lb = mid;
+    else
+      ub = mid;
+  }
+
+  printf("%d\n", lb);
 
   return 0;
 }