I have a private contest in hackerank as a part of algorithm camp, and I want to kick or hide some of people from leaderboard. Is there a way to do it? ( I could not find the way in the management console nor the answer in google)

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when i study , after the read problem , i found the solution I am geting lazy and i am saying "i can take accepted this problem so i dont need to solve" after then i am looking another problem its repeats until i cant find the solution.

is that false?

how can i read to c++ string from position one not zero

Usaco > 2006 > november > gold > Asteroids

question { Problem 1: Asteroids [Gary Sivek, 2004]

Bessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an N x N grid (1 <= N <= 500). The grid contains K asteroids (1 <= K <= 10,000), which are conveniently located at the lattice points of the grid.

Fortunately, Bessie has a powerful weapon that can vaporize all the asteroids in any given row or column of the grid with a single shot. This weapon is quite expensive, so she wishes to use it sparingly. Given the location of all the asteroids in the field, find the minimum number of shots Bessie needs to fire to eliminate all of the asteroids.

PROBLEM NAME: asteroid

INPUT FORMAT:

Line 1: Two integers N and K, separated by a single space.

Lines 2..K+1: Each line contains two space-separated integers R and C (1 <= R, C <= N) denoting the row and column coordinates of an asteroid, respectively.

SAMPLE INPUT (file asteroid.in):

3 4 1 1 1 3 2 2 3 2

INPUT DETAILS:

The following diagram represents the data, where "X" is an asteroid and "." is empty space:

X.X

.X.

.X.

OUTPUT FORMAT:

- Line 1: The integer representing the minimum number of times Bessie must shoot.

SAMPLE OUTPUT (file asteroid.out):

2

OUTPUT DETAILS:

Bessie may fire across row 1 to destroy the asteroids at (1,1) and (1,3), and then she may fire down column 2 to destroy the asteroids at (2,2) and (3,2). }

/////////////////////////////////////////////

I have one more question about this problem. Is there a good way to find which rows and columns

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