ZIO · Cutoff
ZIO Cutoff 2026 — expected score & rank bands
What does your score in Zonal Informatics Olympiad actually get you? These bands map a mock/exam percentage to the rank window and outcomes that score range has typically achieved.
AI-curated from historic cutoff patterns — indicative, not official. Always verify with the latest official notification.
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Category-wise expected cutoff (indicative)
| Category | Expected cutoff (indicative) |
|---|---|
| General | 55–65 marks out of 100 |
| EWS | 50–60 marks out of 100 |
| OBC | 48–58 marks out of 100 |
| SC | 40–50 marks out of 100 |
| ST | 38–48 marks out of 100 |
| PwD | 35–45 marks out of 100 |
- ZIO historically maintains a General category cutoff in the 55–65 range for INOI qualification; OBC typically receives a 5–8 mark relaxation, SC/ST enjoy 10–18 mark concessions to broaden access to national-level training.
- Year-to-year shifts depend on problem difficulty (particularly algorithmic complexity), overall candidature strength, and IARCS policy on cohort size for INOI; a harder paper may depress cutoffs by 5–10 marks across all categories.
- Top performers (82+ marks) across all categories secure direct IOI training camp selection; the cutoff primarily governs the threshold for INOI eligibility, not excellence recognition.
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Elite tier — IOI potential
95–100%
- Top 20-30 nationally in ZIO
- Very strong candidate for IOITC and IOI team selection
- Potential medalist at International Olympiad in Informatics
- Past ZIO toppers have won IOI medals (gold, silver, bronze)
- Continue advanced training with focus on olympiad-level problem solving speed and accuracy
National camp probable
90–95%
- Top 50 nationally, very high INOI rank expected
- Strong probability of IOITC selection
- Potential pathway to IOI team selection (top 4 students represent India)
- Focus on contest strategy and handling time pressure
- Study from IOI, CEOI, and other international olympiad archives
IOITC selection range
82–90%
- Very strong INOI qualification expected
- Typically among top 80-150 students nationally
- Strong contender for IOITC selection (top ~35 from INOI)
- Preparation should target IOI medal range problems
- Master advanced DP optimizations, suffix structures, heavy-light decomposition
INOI strong contenders
70–82%
- High probability of INOI qualification with good rank
- Typically among top 150-250 students nationally
- Potential for IOITC (International Olympiad in Informatics Training Camp) selection from INOI
- Study advanced topics: flows, matching, string algorithms (KMP, Z-algorithm)
- Practice IOI-style problems from past years
INOI qualification range
55–70%
- Strong chance of qualifying for Indian National Olympiad in Informatics (INOI)
- Typically among top 300-400 students nationally
- Advance preparation for INOI with focus on harder algorithmic challenges
- Practice from Codeforces Division 2C/D problems
- Study advanced graph algorithms, computational geometry basics
Regional participation range
35–55%
- May receive regional certificate of participation
- Borderline for INOI qualification depending on zone competitiveness
- Continue strengthening problem-solving speed
- Study segment trees, advanced DP patterns, number theory basics
Below qualification threshold
0–35%
- Score unlikely to qualify for INOI
- Focus on fundamental algorithms and data structures
- Practice problems from USACO Bronze/Silver levels
- Review basic graph theory, dynamic programming, and greedy algorithms
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