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Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /var/www/tb-usercake/models/config.php on line 51
sS replaceOneCharInString(S a, int idx, S b) { ret spliceString(a, idx, idx+1, b); } sS replaceOneCharInString(S a, int idx, char b) { ret replaceOneCharInString(a, idx, str(b)); }