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На VladosiyaCodeforces Round #811 (Div. 3), 4 года назад
0

"s.substr" will create a new string but not its address, that costs most of your memory limit

На VladosiyaCodeforces Round #811 (Div. 3), 4 года назад
0

may i say this round is just a piece of shit ? div3 seriously?