Problem Statement

You are given a string S of length 3 consisting of lowercase English letters.

How many different strings can be obtained by permuting the characters in S?

Constraints

• S is a string S of length 3 consisting of lowercase English letters.

Sample Input 1

aba

Sample Output 1

3

By permuting the characters in S= aba, three different strings can be obtained: aab, aba, baa.

Sample Input 2

ccc

Sample Output 2

1

By permuting the characters in S= ccc, just one string can be obtained: ccc.

Sample Input 3

xyz

Sample Output 3

6

By permuting the characters in S= xyz, six different strings can be obtained: xyz, xzy, yxz, yzx, zxy, zyx.

Problem Statement

Takahashi is making a computer baseball game.
He will write a program that shows a batter's batting average with a specified number of digits.

There are integers A and B, which satisfy 1 \leq A \leq 10 and 0 \leq B \leq A.
Let S be the string obtained as follows.

• Round off \dfrac{B}{A} to three decimal digits, then write the integer part (1 digit), . (the decimal point), and the decimal part (3 digits) in this order, with trailing zeros.

For example, if A=7 and B=4, then \dfrac{B}{A} = \dfrac{4}{7} = 0.571428\dots rounded off to three decimal digits is 0.571. Thus, S is 0.571.

You are given A and B as the input and asked to print S.

Constraints

• 1 \leq A \leq 10
• 0 \leq B \leq A
• A and B are integers.

Sample Input 1

7 4

Sample Output 1

0.571

As explained in the Problem Statement, \dfrac{B}{A} = \dfrac{4}{7} = 0.571428\dots rounded off to three decimal digits is 0.571. Thus, S is 0.571.

Sample Input 2

7 3

Sample Output 2

0.429

\dfrac{B}{A} = \dfrac{3}{7} = 0.428571\dots rounded off to three decimal digits is 0.429. (Note that it got rounded up.)
Thus, S is 0.429.

Sample Input 3

2 1

Sample Output 3

0.500

\dfrac{B}{A} = \dfrac{1}{2} = 0.5 rounded off to three decimal digits is again 0.5.
Thus, S is 0.500. Note that it must have three decimal places.

Sample Input 4

10 10

Sample Output 4

1.000

Sample Input 5

1 0

Sample Output 5

0.000

Problem Statement

Takahashi ate N plates of sushi at a sushi restaurant. The color of the i-th plate is represented by a string C_i.

The price of a sushi corresponds to the color of the plate. For each i=1,\ldots,M, the sushi on a plate whose color is represented by a string D_i is worth P_i yen a plate (yen is the currency of Japan). If the color does not coincide with any of D_1,\ldots, and D_M, it is worth P_0 yen a plate.

Find the total amount of the prices of sushi that Takahashi ate.

Constraints

• 1\leq N,M\leq 100
• C_i and D_i are strings of length between 1 and 20, inclusive, consisting of lowercase English letters.
• D_1,\ldots, and D_M are distinct.
• 1\leq P_i\leq 10000
• N, M, and P_i are integers.

Sample Input 1

3 2
red green blue
blue red
800 1600 2800

Sample Output 1

5200

A blue plate, red plate, and green plate are worth P_1 = 1600, P_2 = 2800, and P_0 = 800 yen, respectively.

The total amount of the prices of the sushi that he ate is 2800+800+1600=5200 yen.

Sample Input 2

3 2
code queen atcoder
king queen
10 1 1

Sample Output 2

21

Problem Statement

There is a grid with H rows and W columns; initially, all cells are painted white. Let (i, j) denote the cell at the i-th row from the top and the j-th column from the left.

This grid is considered to be toroidal. That is, (i, 1) is to the right of (i, W) for each 1 \leq i \leq H, and (1, j) is below (H, j) for each 1 \leq j \leq W.

Takahashi is at (1, 1) and facing upwards. Print the color of each cell in the grid after Takahashi repeats the following operation N times.

• If the current cell is painted white, repaint it black, rotate 90^\circ clockwise, and move forward one cell in the direction he is facing. Otherwise, repaint the current cell white, rotate 90^\circ counterclockwise, and move forward one cell in the direction he is facing.

Constraints

• 1 \leq H, W \leq 100
• 1 \leq N \leq 1000
• All input values are integers.

Sample Input 1

3 4 5

Sample Output 1

.#..
##..
....

The cells of the grid change as follows due to the operations:

....   #...   ##..   ##..   ##..   .#..
.... → .... → .... → .#.. → ##.. → ##..
....   ....   ....   ....   ....   ....

Sample Input 2

2 2 1000

Sample Output 2

..
..

Sample Input 3

10 10 10

Sample Output 3

##........
##........
..........
..........
..........
..........
..........
..........
..........
#........#

Problem Statement

There are N people, each of whom is either a child or an adult. The i-th person has a weight of W_i.
Whether each person is a child or an adult is specified by a string S of length N consisting of 0 and 1.
If the i-th character of S is 0, then the i-th person is a child; if it is 1, then the i-th person is an adult.

When Takahashi the robot is given a real number X, Takahashi judges a person with a weight less than X to be a child and a person with a weight more than or equal to X to be an adult.
For a real value X, let f(X) be the number of people whom Takahashi correctly judges whether they are children or adults.

Find the maximum value of f(X) for all real values of X.

Constraints

• 1\leq N\leq 2\times 10^5
• S is a string of length N consisting of 0 and 1.
• 1\leq W_i\leq 10^9
• N and W_i are integers.

Sample Input 1

5
10101
60 45 30 40 80

Sample Output 1

4

When Takahashi is given X=50, it judges the 2-nd, 3-rd, and 4-th people to be children and the 1-st and 5-th to be adults.
In reality, the 2-nd and 4-th are children, and the 1-st, 3-rd, and 5-th are adults, so the 1-st, 2-nd, 4-th, and 5-th people are correctly judged. Thus, f(50)=4.

This is the maximum since there is no X that judges correctly for all 5 people. Thus, 4 should be printed.

Sample Input 2

3
000
1 2 3

Sample Output 2

3

For example, X=10 achieves the maximum value f(10)=3.
Note that the people may be all children or all adults.

Sample Input 3

5
10101
60 50 50 50 60

Sample Output 3

4

For example, X=55 achieves the maximum value f(55)=4.
Note that there may be multiple people with the same weight.

Problem Statement

Takahashi is standing at the coordinate 0 on a number line.

He will now perform N jumps. In the i-th jump (1 \leq i \leq N), he moves a_i or b_i in the positive direction.

Is it possible for him to be at the coordinate X after N jumps?

Constraints

• 1 \leq N \leq 100
• 1 \leq a_i \lt b_i \leq 100 \, (1 \leq i \leq N)
• 1 \leq X \leq 10000
• All values in input are integers.

Sample Input 1

2 10
3 6
4 5

Sample Output 1

Yes

By moving b_1 (= 6) in the first jump and a_2 (= 4) in the second jump, he can be at the coordinate X (= 10).

Sample Input 2

2 10
10 100
10 100

Sample Output 2

No

He can be at the coordinate X (= 10) after the first jump, but not after all jumps.

Sample Input 3

4 12
1 8
5 7
3 4
2 6

Sample Output 3

Yes

Problem Statement

There are N sports players.

Among them, there are M incompatible pairs. The i-th incompatible pair (1\leq i\leq M) is the A_i-th and B_i-th players.

You will divide the players into T teams. Every player must belong to exactly one team, and every team must have one or more players. Additionally, for each i=1,2,\ldots,M, the A_i-th and B_i-th players must not belong to the same team.

Find the number of ways to satisfy these conditions. Here, two divisions are considered different when there are two players who belong to the same team in one division and different teams in the other.

Constraints

• 1\leq T\leq N\leq10
• 0\leq M\leq\dfrac{N(N-1)}2
• 1\leq A _ i\lt B _ i\leq N\ (1\leq i\leq M)
• (A _ i,B _ i)\neq (A _ j,B _ j)\ (1\leq i\lt j\leq M)
• All input values are integers.

Sample Input 1

5 2 2
1 3
3 4

Sample Output 1

4

The following four divisions satisfy the conditions.

No other division satisfies them, so print 4.

Sample Input 2

5 1 2
1 3
3 4

Sample Output 2

0

There may be no division that satisfies the conditions.

Sample Input 3

6 4 0

Sample Output 3

65

There may be no incompatible pair.

Sample Input 4

10 6 8
5 9
1 4
3 8
1 6
4 10
5 7
5 6
3 7

Sample Output 4

8001

Problem Statement

Person 0, Person 1, \ldots, and Person (N-1) are sitting around a turntable in counterclockwise order, evenly spaced. Dish p_i is in front of Person i on the table.
You may perform the following operation 0 or more times:

• Rotate the turntable by one N-th of a counterclockwise turn. The dish that was in front of Person i right before the rotation is now in front of Person (i+1) \bmod N.

When you are finished, Person i gains frustration of k, where k is the minimum integer such that Dish i is in front of either Person (i-k) \bmod N or Person (i+k) \bmod N.
Find the minimum possible sum of frustration of the N people.

Constraints

• 3 \leq N \leq 2 \times 10^5
• 0 \leq p_i \leq N-1
• p_i \neq p_j if i \neq j.
• All values in input are integers.

Sample Input 1

4
1 2 0 3

Sample Output 1

2

The figure below shows the table after one operation.

Here, the sum of their frustration is 2 because:

• Person 0 gains a frustration of 1 since Dish 0 is in front of Person 3\ (=(0-1) \bmod 4);
• Person 1 gains a frustration of 0 since Dish 1 is in front of Person 1\ (=(1+0) \bmod 4);
• Person 2 gains a frustration of 0 since Dish 2 is in front of Person 2\ (=(2+0) \bmod 4);
• Person 3 gains a frustration of 1 since Dish 3 is in front of Person 0\ (=(3+1) \bmod 4).

We cannot make the sum of their frustration less than 2, so the answer is 2.

Sample Input 2

3
0 1 2

Sample Output 2

0

Sample Input 3

10
3 9 6 1 7 2 8 0 5 4

Sample Output 3

20

Problem Statement

You are given a tree with N vertices. The vertices are numbered 1, \dots, N, and the i-th (1 \leq i \leq N - 1) edge connects Vertices A_i and B_i.

We define the distance between Vertices u and v on this tree by the number of edges in the shortest path from Vertex u to Vertex v.

You are given Q queries. In the i-th (1 \leq i \leq Q) query, given integers U_i and K_i, print the index of any vertex whose distance from Vertex U_i is exactly K_i. If there is no such vertex, print -1.

Constraints

• 2 \leq N \leq 2 \times 10^5
• 1 \leq A_i \lt B_i \leq N \, (1 \leq i \leq N - 1)
• The given graph is a tree.
• 1 \leq Q \leq 2 \times 10^5
• 1 \leq U_i, K_i \leq N \, (1 \leq i \leq Q)
• All values in input are integers.

Sample Input 1

5
1 2
2 3
3 4
3 5
3
2 2
5 3
3 3

Sample Output 1

4
1
-1

• Two vertices, Vertices 4 and 5, have a distance exactly 2 from Vertex 2.
• Only Vertex 1 has a distance exactly 3 from Vertex 5.
• No vertex has a distance exactly 3 from Vertex 3.

Sample Input 2

10
1 2
2 3
3 5
2 8
3 4
4 6
4 9
5 7
9 10
5
1 1
2 2
3 3
4 4
5 5

Sample Output 2

2
4
10
-1
-1