aboutsummaryrefslogtreecommitdiff
path: root/min_ops_make_int_zero.c
diff options
context:
space:
mode:
Diffstat (limited to 'min_ops_make_int_zero.c')
-rw-r--r--min_ops_make_int_zero.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/min_ops_make_int_zero.c b/min_ops_make_int_zero.c
new file mode 100644
index 0000000..95d7255
--- /dev/null
+++ b/min_ops_make_int_zero.c
@@ -0,0 +1,36 @@
+// 2749. Minimum Operations to Make the Integer Zero
+#include "leetcode.h"
+
+/*
+ * you are given two integers 'nums1' and 'nums2'. in one operation you can
+ * choose integer 'i' in the range '[0, 60]' and subtract '2^i + num2' from
+ * 'num1'. return the integer denoting the minimum number of operations needed
+ * to make 'nums1' equal to 0. if it is impossible to make 'nums1' equal to 0,
+ * return -1.
+ */
+
+int bit_cnt(long long num) {
+ int cnt = 0;
+ while (num > 0) {
+ cnt += num & 1;
+ num >>= 1;
+ }
+ return cnt;
+}
+
+int makeTheIntegerZero(int num1, int num2) {
+ if (num1 < num2)
+ return -1;
+ for (int i = 0; i <= 100; i++) {
+ long long diff = num1 - 1LL * num2 * i;
+ int bits = bit_cnt(diff);
+ if (bits <= i && i <= diff)
+ return i;
+ }
+ return -1;
+}
+
+int main() {
+ printf("%d\n", makeTheIntegerZero(3, -2)); // expect: 3
+ printf("%d\n", makeTheIntegerZero(5, 7)); // expect: -1
+}