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[1541B] Pleasent Pairs — Same logic, One got AC, but another gives TLE. Why?
By Cooper1214, history, 4 years ago, In English

So, I have encountered a strange problem while solving 1541B — Pleasent Pairs
My first solution gets accepted ( Solution 1 ) , while the second one got TLE ( Solution 2).

I don't understand why this is happening. They both are almost same. Any help?
Thank you.

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4 years ago, hide # |
 
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This happens because an overflow of i*j expression (i * j can be 4*10^10 that more than can be placed in int (2^31-1 (2'147'483'647) is the max int value) ) so the cycle doesn't end when i*j > 2*n and you get TLE. You just can write 1LL*i*j > 2*n and this will get accepted.

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