day 1

Signed-off-by: Jack Bond-Preston <jackbondpreston@outlook.com>

1/1a.cpp

@@ -0,0 +1,19 @@
+#include <fstream>
+#include <climits>
+#include <iostream>
+
+int main() {
+    std::ifstream infile("input.txt");
+
+    unsigned int curr, prev = UINT_MAX;
+    unsigned int increases = 0;
+
+    while (infile >> curr) {
+        if (curr > prev) ++increases;
+        prev = curr;
+    }
+
+    std::cout << increases << std::endl;
+
+    return 0;
+}

1/1b.cpp

@@ -0,0 +1,29 @@
+#include <fstream>
+#include <climits>
+#include <iostream>
+#include <vector>
+
+int main() {
+    std::ifstream infile("input.txt");
+
+    std::vector<int> window { 0, 0, 0 };
+    int curr = 0;
+    unsigned int increases = 0;
+
+    infile >> window[0];
+    infile >> window[1];
+    infile >> window[2];
+
+    while (infile >> curr) {
+        int prev_sum = window[0] + window[1] + window[2];
+        int new_sum  = window[1] + window[2] + curr;
+
+        if (new_sum > prev_sum) ++increases;
+
+        window = { window[1], window[2], curr };
+    }
+
+    std::cout << increases << std::endl;
+
+    return 0;
+}