I don't remember, but someone mentioned that there were lots of similar submissions to E1, when I looked at the suspicious submissions, they had one thing in common: memory consumed was equal to 8089600 bytes, so I ran some python and obtained these submissions(lets see how many are detected by plag-checker):

277430236, 277426958, 277425890, 277425852,277424914,277424565,277418774,277418655,277418511,277418081,277417714,277417556,277417035,277416988,277415986,277415655,277415207,277414924,277414655,277413989,277413413,277413097,277412884,277412728,277412417,277412344,277412005,277411755,277411550,277411327,277410979,277410321,277410177,277409832,277409824,277409359,277409074,277409041,277408703,277408572,277407753,277407318,277406742,277405486,277403754,277402258,277401666,277401564,277400636,277399545,277398866,277397736,277397082,277396857,277394969,277394652,277394299,277393347,277392523,277390643] Honorable mention [submission:277409802 277414074]