teamnote history merge

2026-06-03 09:36:52 +09:00
parent f50ed902fe
commit 7176febe54
142 changed files with 13243 additions and 0 deletions
--- a/2025fall/source/Math/Harmonic.cpp
+++ b/2025fall/source/Math/Harmonic.cpp
@@ -0,0 +1,12 @@
+ll harmonic(ll n) {
+    ll ans = 0;
+    for(ll i = 1; i <= n; i = n/(n/i)+ 1) {
+        //for j \in [i, n/(n/i)] : n/j == n/i
+        
+        ans += n/i * (n/(n/i) - i + 1);
+        
+        // \sum_{i=1}^n {f(n/i)}
+        // ans += f(n/i) * (n/(n/i) - i + 1)
+    }
+    return ans;
+}