Why 15 ?

Edited by author 10.08.2014 12:35

Edited by author 10.08.2014 12:35

When? :)

why i always got wrong 3 ?

import java.util.List;
import java.util.ArrayList;
import java.util.Scanner;


public class Spion {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        List<String>shifr = new ArrayList();
        String word = in.next();

    shifr.add(""+word.charAt(0));

    for(int i =1;i<word.length();i++){
        String s =""+word.charAt(i);
        shifr.add(s);

        if(shifr.get(shifr.lastIndexOf(s)).equals(shifr.get(shifr.indexOf(s))) && shifr.lastIndexOf(s)==shifr.indexOf(s)+1)
            {
            shifr.remove(shifr.get(shifr.lastIndexOf(s)));
            shifr.remove(shifr.get(shifr.indexOf(s)));

            };

    }

        for(String n: shifr){

            System.out.print(n);
        }







    }

}

what's wrong?

Can you please give me some tests?

Тест №2 противоречит условию задачи , это тест такой :
1
1 0
(подобрал с помощью бинпоиска)

import java.util.Scanner;

public class AcmTimusRu {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int a = s.nextInt();
        int b = s.nextInt();

          if (39 + 2 * a > a + 2 * b) {
            System.out.println(2*a+39);
        } else {
            System.out.println(2*b+40);
        }
    }
}

import java.text.DecimalFormat;
import java.util.Scanner;

public class prob {

    public static void main(String[] args) {
        Scanner c = new Scanner(System.in);
        DecimalFormat twoDecimals = new DecimalFormat("0.00%");
      int n = c.nextInt();
      int counter = 0;
      double m = c.nextInt();
      int []a = new int [c.nextInt()];
      for(int i = 0; i < a.length; i++){
          a[i]= c.nextInt();
      }
      for(int j = 1; j<=n; j++){
          int z = j;
          for (int i = 0; i < a.length; i++){
              if(a[i] == z)
                  counter++;
          }
          System.out.println(counter*100 / m);
      }
    }
}

parsing in just one line XD

from string import *
from functools import *

[[a1,b1],[a2,b2],[a3,b3]] = map(partial(map,int),map(split,map(raw_input, [""]*3)))

& in py3k:
from functools import *
[[a1,b1],[a2,b2],[a3,b3]] = map(partial(map,int),map(lambda x:x.split(),map(input, [""]*3)))

Edited by author 05.04.2014 04:37

I can't understand why my program work slow, I don't know any algorithm that can solvе this problem in beter time. My program solve it in 0.125s, when others in 0.031. Why ? Please help me :)

9 15
1 2
3 1
1 5
4 2
6 2
3 4
3 6
4 5
6 5
5 7
6 7
6 8
8 7
7 9
8 9
1 9

Ans: 0

Many AC codes input the n=100, output have many zero before the radix point, the relative error is not enough very much! Why did they accept?

Be careful!

input

5 4
4 2
2 1
1 3
3 4

I think output should "1" but most of my colleagues' accepted programs print "0". Do I misunderstand the problem ?

Edited by author 10.02.2014 00:44

#include<iostream>
#include<conio.h>
#include<Math.h>

using namespace std;

int main()
{
    long long int a[ 100000 ];
    int i = 0;
    do
    {
        cin>>a[ i ];
        i ++;

    }while( a[ i - 1 ] != EOF );
    for( int j = i - 1; j > -1; j -- )
    {
        if( a[ j ] >= 0 )
            cout<<sqrt((double)a[ j ])<<endl;
    }

}

I don't know what is the fastest way to solve this, but I think mine is more complicated than it can be. I've keeped a vector for each remainder i mod k and i*i mod k, to quickly find the numbers which give remainder r. Then you can add edge by edge in graph and use union-find algo to check for cycles. Maybe there is a faster math solution?