Solved 1610C – Keshi Is Throwing a Party 🎉 ❌ Mistake: I was only checking the mid-th friend’s (a,b) ✅ Fix: I now iterate from poorest to richest, counting valid friends — if count reaches k, it’s possible. Binary Search + Greedy finally clicked → got AC 💪🔥
#whatididtoday ✅ Solved CSES Array Division 🔥 🧠 Key Learnings: Debugged with while (l <= h) ➝ fixed off-by-1 bug (ans was 1000, my O/P was 1001 😅) Realized we need subparts ≤ k (not == k) when checking if x can be the max subarr sum Code: 🔗cses.fi/paste/4125181b…
today i solved Lc 780 and atcoder • abc241_d - Sequence Query-map val with idx • cses_1161 - Stick Divisions - join like huffman "LC 780 — instead of subtracting many times, just do tx %= ty / ty %= tx; % compresses n subtractions into one shot ⚡"
my notion work where i do all qs notes: n.so/CP-GUIDE-2448a… #100DaysOfCode #CP #CSES #Codeforces
Today’s progress 🚀 ✅ Solved 2 Qs: 1️⃣ CSES: Multiplication Table → BS on range [1, n²], check mid via count ≤ mid vs n(n+1)/2. 2️⃣ CF C. Chat Ban: BS on [1, 2k–1], calc total emotes in m its like prefix sum or sum of first m natural nums , adjust low/high.
i am following this roadmap drive.google.com/file/d/16Jydn2… and giving each contest to achieve my goal
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