What's wrong with me (or with this test)?
Usually test #1 is the example. I don't see where the problem could come form.
I know there were other people getting TL, could you tell what's the problem.

Help me please.. Why WA 3?
I "Use this letter as a formal description of the algorithm and follow the described format of system messages" and still get Wrong Answer..

This test is correct?

7
login a 1
fail: no such user
logout a
fail: no such user
register a 1
success: new user added
login a 1
success: user logged in
login a 1
fail: already logged in
login a 2
fail: incorrect password
register a 2
fail: user already exist

Maybe you tell a counterexample or hint?

Thanks.

Edited by author 02.08.2016 21:56

Can you please explain - why the code below generates Runtime error during checking ? Thanks,

import java.util.*;

public class Task0002 {

    public static void main(String[] args) {
        Scanner scin = new Scanner(System.in);
        ArrayList<Double> values = new ArrayList<Double>();
        String strIn;
        int lenScin = 0;
            do {
                strIn = scin.nextLine();
                lenScin += strIn.length();
                strIn = strIn.trim();
                strIn = strIn.replaceAll("  ", " ");

                // Process the line
                    if(strIn.length()>0) {
                        for(String s: strIn.split(" ")) {
                        values.add(Double.parseDouble(s));
                        };
                    };

            } while(scin.hasNextLine() && lenScin <= 262144);
        scin.close();

        for(int i = values.size()-1; i>=0; i--) {
        double val = (double)values.get(i);
        System.out.println(Math.sqrt(val) + " ");
        };

    }

}

Edited by author 02.08.2016 12:29

what test?

I wanted to see my previous submissions but I cant seem to find the login page. What to do?

#include<iostream>
#include<iomanip>
#include<math.h>
using namespace  std;


int main()
{
    unsigned long long n;
    double a[128*1024];
    int i=0;
    while(cin>>n)
    {
        a[i]=sqrt(n);
        i++;
    }
    cout<<setprecision(4)<<fixed;
    for(int b=i-1;b>=0;b--)
    {
    cout<<a[b]<<endl;
    }

    return 0;
}

Edited by author 01.08.2016 20:26

Hi
I got MLE #7. Why?


#include <cstdio>
#include <algorithm>

int a[250000];

int main()
{
    int n;
    std::scanf("%d", &n);

    for (int i = 0; i < n; i++)
        std::scanf("%d", a + i);

    if (n % 2)
    {
        std::nth_element(a, a + n / 2, a + n);
        std::printf("%d\n", a[n / 2]);
    }
    else
    {
        std::nth_element(a, a + n / 2, a + n);
        std::nth_element(a, a + n / 2 - 1, a + n);
        std::printf("%.1f\n", (a[n / 2] + .0 + a[n / 2 - 1]) / 2);
    }

    return 0;
}

#include <stdio.h>
#include<math.h>
int main()
{ int n;
double t[100];
scanf("%d", &n);
int i;
for(i=1; i<=n;i++){

    scanf("%lf", &t[i]);

}
for(i=n; i>0; i--){

    printf("%lf\n",sqrt(t[i]));
}
return 0;

}

just in case thats the code

#include <stdio.h>
#include <stdbool.h>
#include <math.h>

static inline double dot(const double* a, const double* b) { return a[0]*b[0] + a[1]*b[1] + a[2]*b[2]; }
static inline double mind(double a, double b) { return a < b ? a : b; }
static inline double maxd(double a, double b) { return a > b ? a : b; }

static inline bool intersect_ray_sphere(const double* p, const double* dir, const double* sc, double sr, double* t)
{
    const double m[] = {p[0] - sc[0], p[1] - sc[1], p[2] - sc[2]};
    const double b = dot(m, dir), c = dot(m,m) - sr*sr;
    if(c > 0 && b > 0) return false;
    const double discr = b*b - c;
    if(discr < 0) return false;

    *t = maxd(0, -b - sqrt(discr));
    return true;
}

static inline bool intersect_moving_sphere_sphere(const double* c0, double r0, const double* v0, const double* c1, double r1, const double* v1, double* t)
{
    // to transform to moving sphere vs stationery sphere: subtract v1 from both v1,v0
    // to transform to ray-sphere intersection: expand sphere1 by radius of s1

    const double r = r0+r1;
    double v[] = { v0[0] - v1[0], v0[1] - v1[1], v0[2] - v1[2] };

    double vlen = sqrt(dot(v,v));
    if(vlen < 1e-6) return false;
    v[0] /= vlen, v[1] /= vlen, v[2] /= vlen;

    bool ret = intersect_ray_sphere(c0, v, c1, r, t); *t /= vlen;
    return ret;
}

int main()
{
    unsigned N; double Rd; scanf("%u %lf\n", &N, &Rd);
    double c[N][3], v[N][3];
    for(unsigned i = 0, n = N ; i < n ; ++i) scanf("%lf %lf %lf %lf %lf %lf\n", &c[i][0], &c[i][1], &c[i][2], &v[i][0], &v[i][1], &v[i][2]);

    const double R = Rd / 2.0;

    double min_t; bool have_intersection = false; unsigned min_pair1, min_pair2;
    for(unsigned i = 0, n = N ; i < n ; ++i)
    for(unsigned j = i+1, m = N ; j < m ; ++j)
    {
        double t; bool intersect = intersect_moving_sphere_sphere(c[i], R, v[i], c[j], R, v[j], &t);
        if(intersect && (t < min_t || have_intersection == false))
            min_t = t, min_pair1 = i, min_pair2 = j, have_intersection = true;
    }

    if(have_intersection)   printf("ALARM!\n%.3f %u %u\n", min_t, min_pair1+1, min_pair2+1);
    else                    printf("OK\n");

    return 0;
}

Edited by author 31.07.2016 21:50

Edited by author 31.07.2016 21:51

Edited by author 31.07.2016 22:01

program arrays;
var
 k:array[1..20]of longint;
 d:array[0..20]of longint;
 n:integer;
 s:longint;
procedure init;
var
 i:integer;
begin
 readln(n,s);
 for i:=1 to n do
  readln(d[i]);
 d[0]:=s;
end;
procedure solve;
var
 i:integer;
begin
 k[n]:=d[n-1]-1;
 for i:=n-1 downto 1 do
  k[i]:=(d[i-1] div d[i])-1;
 for i:=1 to n-1 do
  write(k[i],' ');
 writeln(k[n]);
end;
begin
 init;
 solve;
end.

This problem may have four answers: inf, 0, 1, 2 :)

Hi, I've solved the problem easily on C, but can't solve it on C# (almost the same code), getting Runtime Error on #2.
Can someone point out what's wrong in my code?

using System;

namespace Application
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int[] pos = new int[3];
            for(int i=0; i<n; i++)
            {
                string[] s = Console.ReadLine().Split(' ');
                int ind = s[0][0] - 'X';
                pos[ind] += int.Parse(s[1]);
            }

            while(true)
            {
                if(pos[0] * pos[2] > 0)
                {
                    int sign = pos[0] / Math.Abs(pos[0]);
                    int min = Math.Min(Math.Abs(pos[0]), Math.Abs(pos[2]));
                    pos[0] -= sign * min;
                    pos[1] += sign * min;
                    pos[2] -= sign * min;
                }
                else if(pos[0] * pos[1] < 0)
                {
                    int sign = pos[0] / Math.Abs(pos[0]);
                    int min = Math.Min(Math.Abs(pos[0]), Math.Abs(pos[1]));
                    pos[0] -= sign * min;
                    pos[1] += sign * min;
                    pos[2] -= sign * min;
                }
                else if(pos[1] * pos[2] < 0)
                {
                    int sign = pos[2] / Math.Abs(pos[2]);
                    int min = Math.Min(Math.Abs(pos[1]), Math.Abs(pos[2]));
                    pos[0] -= sign * min;
                    pos[1] += sign * min;
                    pos[2] -= sign * min;
                }
                else
                {
                    break;
                }
            }
            int nOfDir = 0;
            if(pos[0] != 0)
                nOfDir++;
            if(pos[1] != 0)
                nOfDir++;
            if(pos[2] != 0)
                nOfDir++;
            Console.WriteLine(nOfDir);
            if(pos[0] != 0)
                Console.WriteLine("X " + (-pos[0]).ToString());
            if(pos[1] != 0)
                Console.WriteLine("Y " + (-pos[1]).ToString());
            if(pos[2] != 0)
                Console.WriteLine("Z " + (-pos[2]).ToString());
        }
    }
}

I just use the scanf to read the input data. Why do I also receive a TLE response?

I have WA12. Help me!

python 3

my code :

import sys
for t in sys.stdin :
        s = ''
        for i in range(len(t)):
                if (ord(t[i]) >=97 and ord(t[i]) <= 122) or (ord(t[i])>=65 and ord(t[i])<=90):
                        s += t[i]
                else :
                        if len(s) > 0 :
                                print(s[len(s)-1:0:-1]+s[0], end='')
                                s = ''
                        print(t[i], end='')
        print(s, end='')


Edited by author 29.08.2016 01:57

Hi
I got WA on test 10 |:
I need some testcase!
PLZ HELLLLLP MEEEE! :D

Please help me with WA#10. Can you give me the test in which my program outputs this WA.

program Project1;
{$LONGSTRINGS ON}
{$APPTYPE CONSOLE}

uses
  SysUtils;

var c,lc:char;
    ans:longint;
    b:boolean;

begin
  {$IFNDEF ONLINE_JUDGE}
  reset(input,'input.txt');
  rewrite(output,'output.txt');
  {$ENDIF}
  ans := 0;
  b := false;
  c := #1;
  while not eof(input) do
  begin
    lc := c;
    read(c);
    if (c in ['a'..'z']) and (not b) then
      inc(ans);
    if (c in ['A'..'Z']) and (lc in (['A'..'Z'] + ['a'..'z'])) then
      inc(ans);
    if not (c in ['.','?','!',' ',#10,#13]) then
      b := true;
    if c in ['.','?','!'] then
      b := false;
  end;
  write(ans);
end.