C. Wet Shark and Flowers---（逆向思維+轉換概率）Codeforces Round #341 (Div. 2)

Wet Shark and Flowers 題目鏈接https://codeforces.com/problemset/problem/621/C time limit per test 2 seconds memory limit per test 256 megabytes emmm，題目大意：給你n個區間si，一個質數p，每當你找到兩個數x,y分別屬於si和si+1其x*y爲p的倍數時，會獎

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