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| author | crupest <crupest@outlook.com> | 2020-10-13 22:22:11 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2020-10-13 22:22:11 +0800 |
| commit | 1478c6b582e194a330e1f1f76e2b6c423be5e29d (patch) | |
| tree | 950985ee9c94c4478c66da6919a4dad5f00bc950 /works | |
| parent | 7f39523b6b2bf109fb92041e3c9215a9e31ab6f4 (diff) | |
| download | crupest-1478c6b582e194a330e1f1f76e2b6c423be5e29d.tar.gz crupest-1478c6b582e194a330e1f1f76e2b6c423be5e29d.tar.bz2 crupest-1478c6b582e194a330e1f1f76e2b6c423be5e29d.zip | |
import(solutions): Add problem 401 .
Diffstat (limited to 'works')
| -rw-r--r-- | works/solutions/cpp/401.cpp | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/works/solutions/cpp/401.cpp b/works/solutions/cpp/401.cpp new file mode 100644 index 0000000..2618872 --- /dev/null +++ b/works/solutions/cpp/401.cpp @@ -0,0 +1,68 @@ +#include <string>
+#include <vector>
+
+using std::string;
+using std::vector;
+
+#include <array>
+#include <cstdio>
+
+const std::array<int, 4> hour_digits{1, 2, 4, 8};
+const std::array<int, 6> minute_digits{1, 2, 4, 8, 16, 32};
+
+class Solution
+{
+public:
+ template <int max, std::size_t size>
+ void dfs(const std::array<int, size> &digits, int total_count,
+ int rest_count, int start_index, int value,
+ std::vector<int> &result)
+ {
+
+ if (value >= max)
+ return;
+
+ if (rest_count == 0)
+ {
+ result.push_back(value);
+ return;
+ }
+
+ for (int i = start_index; i <= size - rest_count; i++)
+ {
+ dfs(digits, max, total_count, rest_count - 1, i + 1,
+ value + digits[i], result);
+ }
+ }
+
+ vector<string> readBinaryWatch(int num)
+ {
+ vector<string> results;
+
+ for (int i = (num > 6 ? num - 6 : 0); i <= (num > 4 ? 4 : num); i++)
+ {
+ std::vector<int> hours;
+ std::vector<int> minutes;
+ if (i == 0)
+ hours = {0};
+ else
+ dfs<12>(hour_digits, i, i, 0, 0, hours);
+ if (i == num)
+ minutes = {0};
+ else
+ dfs<60>(minute_digits, num - i, num - i, 0, 0, minutes);
+
+ for (auto hour : hours)
+ {
+ for (auto minute : minutes)
+ {
+ char buffer[6];
+ sprintf(buffer, "%d:%02d", hour, minute);
+ results.push_back(string(buffer));
+ }
+ }
+ }
+
+ return results;
+ }
+};
|