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第4个条件什么意思？For 1 < i < c, the amount of rotation required to rotate pi-1 around pi in clockwise direction to become co-linear with pi and pi+1, is greater than 180 degrees. Likewise, for c < i < n, the amount of rotation required to rotate pi-1 around pi in clockwise rotation to become co-linear with pi and pi+1, is greater than 180 degrees. Followed by: Post your reply here: |
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