原创 1105. Word Index
Encoding schemes are often used in situations requiring encryption or information storage/transmission economy. Here, w
2018-08-22 12:48:12
原创 拓撲排序 2892. Task
Peter is very interested in Artificial Intelligence. His teacher leaves him several problems. Since he is not very fam
2018-08-22 12:48:12
2
原创 4003. I-number
The I-number of x is defined to be an integer y, which satisfied the the conditions below: 1. y>x; 2. the sum of each
2018-08-22 12:48:12
1
原创 3823. Divisible Subsquences
題目大意：給定一個數和一個序列 計算這個序列中有多少個子序列的和是這個數的倍數。 思路：a[i]+a[i+1]+..+a[j] = s[j]-s[i]，如果要和是其倍數， 則表示s[j]-s[i]能夠整除那個數，只要s[j]和s[i]對
2018-08-22 12:48:12
3
原创 4043. Magic Pen 6
In HIT, many people have a magic pen. Lilu0355 has a magic pen, darkgt has a magic pen, discover has a magic pen. Rece
2018-08-22 12:48:12
原创 1525. One Person "The Price is Right"
題目大意:每個人允許猜 G 次,有 L 生命線。猜低或猜高了,耗費一次猜得機會,猜高了,還 會浪費一生命線。 先從搜索考慮。設f(g,l)表示有g次機會,l條生命線時可以猜到的最大價格範圍。
2018-08-22 12:48:12
4
原创 2908. Annoying painting tool
水題 題目大意是輸入n和m，代表有n行m列像素點，初始所有的像素均爲白色，即爲0，然後給定一個r*c的舉證，在這個範圍內發像素均改變它的顏色，黑變白，白變黑，問有至少多少次操作使最終變成給定的像素矩陣。 所以用反向思維，求最終用多少次操作
2018-08-22 12:47:55
2