Lösung für Tag1

2 files changed, 92 insertions, 0 deletions

diff --git a/src/01a.cpp b/src/01a.cpp
new file mode 100644
index 0000000..1fcc763
--- /dev/null
+++ b/src/01a.cpp
@@ -0,0 +1,23 @@
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <string>
+using namespace std;
+
+int
+main()
+{
+        string  digits{ "0123456789" };
+        fstream input{ "data/01a.txt" };
+
+        int sum = 0;
+        for ( string line; input >> line; ) {
+                auto first = find_first_of(begin(line), end(line), begin(digits), end(digits));
+                auto last  = find_first_of(rbegin(line), rend(line), begin(digits), end(digits));
+
+                auto value = (*first - '0') * 10 + (*last - '0');
+
+                sum += value;
+        }
+        cout << sum << endl;
+}
diff --git a/src/01b.cpp b/src/01b.cpp
new file mode 100644
index 0000000..f87da3a
--- /dev/null
+++ b/src/01b.cpp
@@ -0,0 +1,69 @@
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <string>
+#include <vector>
+using namespace std;
+
+string
+replace_all(string str, const string search, const string with)
+{
+        for ( ;; ) {
+                auto it = str.find(search);
+                if ( it == string::npos )
+                        break;
+                str.replace(it, search.length(), with);
+        }
+        return str;
+}
+
+int
+main()
+{
+        map<string, int> map{
+                { "0", 0 },
+                { "1", 1 },
+                { "2", 2 },
+                { "3", 3 },
+                { "4", 4 },
+                { "5", 5 },
+                { "6", 6 },
+                { "7", 7 },
+                { "8", 8 },
+                { "9", 9 },
+                { "one", 1 },
+                { "two", 2 },
+                { "three", 3 },
+                { "four", 4 },
+                { "five", 5 },
+                { "six", 6 },
+                { "seven", 7 },
+                { "eight", 8 },
+                { "nine", 9 },
+        };
+
+        fstream input{ "data/01a.txt" };
+
+        int sum = 0;
+        for ( string line; input >> line; ) {
+                string sub;
+                vector<int> digits;
+
+                for ( auto ch: line ) {
+                        sub += ch;
+
+                        for ( const auto& word: map ) {
+                                if ( sub.ends_with(word.first) ) {
+                                        digits.push_back(word.second);
+                                }
+                        }
+                }
+
+                auto first = digits.front();
+                auto last = digits.back();
+
+                sum += (first * 10) + last;
+        }
+        cout << sum << endl;
+}