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authorYuqian Yang <crupest@crupest.life>2025-02-28 23:13:39 +0800
committerYuqian Yang <crupest@crupest.life>2025-02-28 23:13:39 +0800
commit99e2e923d0c77b02f3fb4ff648ea916954868606 (patch)
treeec8e03f6f2cd1ce43990fb4fe6cd631967d0237e /works/solutions/leetcode/cpp/639.cpp
parent1cee979f5d36b311a03cc7397a036ba11caf3d42 (diff)
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chore(store): move everything to store.
Diffstat (limited to 'works/solutions/leetcode/cpp/639.cpp')
-rw-r--r--works/solutions/leetcode/cpp/639.cpp56
1 files changed, 0 insertions, 56 deletions
diff --git a/works/solutions/leetcode/cpp/639.cpp b/works/solutions/leetcode/cpp/639.cpp
deleted file mode 100644
index ead252e..0000000
--- a/works/solutions/leetcode/cpp/639.cpp
+++ /dev/null
@@ -1,56 +0,0 @@
-#include <string>
-
-using std::string;
-
-const long long M = 1e9 + 7;
-
-class Solution {
-public:
- long long f[100010]{0};
-
- int numDecodings(string s) {
- f[0] = 1;
- if (s.front() == '*') {
- f[1] = 9;
- } else if (s.front() == '0') {
- f[1] = 0;
- } else {
- f[1] = 1;
- }
-
- for (int i = 2; i <= s.size(); i++) {
- char c = s[i - 1], l = s[i - 2];
- if (c == '*') {
- f[i] += f[i - 1] * 9;
- if (l == '*') {
- f[i] += f[i - 2] * 15;
- } else if (l == '1') {
- f[i] += f[i - 2] * 9;
- } else if (l == '2') {
- f[i] += f[i - 2] * 6;
- }
- f[i] %= M;
- } else if (c == '0') {
- if (l == '1' || l == '2')
- f[i] += f[i - 2];
- else if (l == '*')
- f[i] += f[i - 2] * 2;
- f[i] %= M;
- } else {
- f[i] += f[i - 1];
- if (l == '*') {
- if (c <= '6')
- f[i] += f[i - 2] * 2;
- else
- f[i] += f[i - 2];
- } else if (l == '1')
- f[i] += f[i - 2];
- else if (l == '2' && c <= '6')
- f[i] += f[i - 2];
- f[i] %= M;
- }
- }
-
- return f[s.size()] % M;
- }
-};