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In today's Div 1+2 E, I used a fenwick tree.
234313772 WA1 234313386 Accepted due to commenting that #define int ll
So why ? I had already been facing negative value for tc2 during contest and I got bored and abandoned it. But after contest I found that line was the reason.. WHY? I really can't figure out a reason.
It has something to do with memset. This 234321001 and this 234321479 workss maybe because int is 4 bytes and long long is 8 bytes
Reasonable. Thanks