Like for top 100 Indian , how do they decide whether a participant is genuinely from India ?
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Give me your IP and I will tell you exactly which city are you from
No VPN come back please. Absolutely no one uses a VPN to submit solutions.
Using VPN is so troublesome, how will you collect the prize as non-Indian. I'd rather ask a trusted person to submit my solutions and split $$$. And if the prize is not money then this option is even more convenient!