Please give me some more tests. And what is the test number 4?

My code:

why WA#6

import java.io.*;
import java.util.*;

public class misol1607
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        int a = in.nextInt();
        int b = in.nextInt();
        int c = in.nextInt();
        int d = in.nextInt();
        int r=c;
        while (a<c)
        {
            if ((a+b)>=c)
            {
                r=c;
                break;
            }
            else
            {
                a=a+b;
            }

            if (a>=(c-d))
            {
                r=a;
                break;
            }
            else
            {
                c=c-d;
            }
        }

        out.println(r);

        out.flush();
   }
}

//c++
#include <iostream>
void main()
 {
  int ps,pu,ts,td,dif;
  std::cin>>ps>>pu>>ts>>td;
  dif=((ts=ps>ts?ps:ts)-ps)/(pu+td);
  std::cout<<(((ps+=(dif+1)*pu)<(ts-=dif*td))?ps:ts);
 }

When I first saw this problem, I thought I would be done in 5 minutes but ended up spending 1 and 1/2 hours. Few test cases, so that you don't blow your head up !

Input: 4000 100 200 100
Output: 4000

Input: 150 400 1000 200
Output: 800

import java.util.*;
public class Taxi {


    public static void main(String[] args) {

        int a, b, c, d;

    Scanner rc = new Scanner(System.in);
            System.out.println("Введите стартовую сумму клиента: ");
    a = rc.nextInt();
            System.out.println("Введите стартовую сумму водителя: ");
    c = rc.nextInt();
            System.out.println("Введите сумму, на которую клиент повышает: ");
    b = rc.nextInt();
            System.out.println("Введите сумму, на которую водитель понижает: ");
    d = rc.nextInt();

while (a < c){

    a+=b;
    c-=d;
}


    System.out.println("Сумма, на которой они сошлись: "+a);


}

    }


у меня всё нормально работает, а ихний компилятор бракует... что не правильно?

Edited by author 18.03.2013 15:14

Edited by author 18.03.2013 15:14

import java.util.*;
public class taksi
{
 public static void main(String args[])
 { Scanner in = new Scanner(System.in);
  int a = in.nextInt();
int a1 = in.nextInt();
int b = in.nextInt();
int b1 = in.nextInt();
int g = 0;
      for(int i = b;i>a;i=i-b1)
      {
          a=a+a1;
          if(i>a)
         g = a;
          }
          System.out.println(" kelisken bagasy :"+g);
 }
}

#include <iostream>
using namespace std;
int taxi(int a,int b,int c,int d){
if ((a+b)>c) {return c;}
a+=b;
if ((c-d)<a) return a;
c-=d;
taxi(a,b,c,d);
}
int main()
{
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    cout<<taxi(a,b,c,d);
    return 0;
}

Wrong answer test #1

[Code deleted by moderator]

Edited by moderator 04.03.2012 00:14

#include<iostream>
using namespace std;
int main()
{int a,b,c,d;

cin>>a>>b>>c>>d;
while(a<=c)
{
a=a+b;
if(a>c)
a=c;
c=c-d;

}
cout<<a;

    return 0;
}

#include "stdio.h"
#include "conio.h"
#include "iostream"
#include "math.h"
using namespace std;


void main()
{
    int GP,P,GT,S,y=1;
    scanf("%i",&GP);scanf("%i",&P);scanf("%i",&GT);scanf("%i",&S);
    if((GP+P>=GT)||(GP>=GT))
    {
        if(GP>=GT) printf("%i",GP);
        else
            if(GP+P>=GT) printf("%i",GT);
    }
    else
    {
        while(y!=0)
        {
            if((GP<GT)&&(y!=0)&&(GP+P<=GT)) GP+=P;
            else y=0;
            if((GT>GP)&&(y!=0)&&(GT-S>=GP)) GT-=S;
            else y=0;
        }
        //if(GP>=GT)printf("%i",GP);
        //else printf("%i",GT);
        if(GP+P<=GT) printf("%i",GP);
        else
        {
            if(GT-S<=GP) printf("%i",GP);
            else printf("%i",GT);


        }
    }
    getch();
}

Hello!
I have wa #2. But i don't undestand my mistake.can somebody help me?
listnig is below

import java.util.Scanner;
public class q1607 {
    /**
     * @param args
     */
    public static void main(String[] args) {
        Scanner in1 = new Scanner(System.in);
        int a=in1.nextInt();
        int b=in1.nextInt();
        int c=in1.nextInt();
        int d=in1.nextInt();
        a=a-b;
        c=c+d;
        while (a<=c-d)
        {
            a=a+b;
            if (a>=c-d)
            {break;}
            c=c-d;
        }
        System.out.println(a);
    }
}

I wonder why the solution with Arithmetic progression is impossible.
a:=a+b
c:=c-d
...
...
and several times
isn't that equals to a:=a+bx
and c:=c-dx ??

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

#include"iostream.h"
#include"math.h"
double a,d1,b,d2,m;
int i,j;
int main()
{

    cin>>a>>d1>>b>>d2;
    if(a>=b){cout<<a<<endl;goto u;}
    if(a+d1>=b){cout<<b<<endl;goto u;}
    while(a<b)
    {
        a=a+d1;
        if(a>=b || a+d1>=b)
        {
            cout<<a<<endl; break;
        }
        b=b-d2;
        if(a>=b)
        {
            cout<<b<<endl; break;
        }
    }
u:
    return 0;
}


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

#include<iostream.h>
#include<math.h>
int main()
{
    int a1,b1,a2,b2;
    cin>>a1>>b1>>a2>>b2;
if(a2<=a1)
cout<<a1;
else
if(abs(a1-a2)<b1)
cout<<a2;
else{
    while(a1<a2)
    {
        a1+=b1;
    a2-=b2;
}
if(a1>a2)
cout<<a1;
else
cout<<a2;
}
return 0;
}
Where I'm wrong?Please help!Thank in advance!!!

var
   u1, u2, d1, d2: longint;
K: real;
begin
   readln(u1, d1, u2, d2);
   if u1>u2 then write(u1)
      else
begin
k:= (u2-u1)/(d1+d2);
write(int(k)*d1 +u1 + d1:0:0);end;
end.

#include <iostream.h>
int main()
{
    int P,p,T,t;
    cin>>P>>p>>T>>t;
    while(T>P)
    {

        P+=p;
        T-=t;
    }
    P-=p;
    T+=t;
    if(P+p>=T)
    {
        cout<<T;
        return 0;
    }
    if(P+p<T)
    {
        cout<<P+p;
        return 0;
    }
    if(P+p==T)
    {
        cout<<P;
        return 0;
    }
    return 0;
}

#include <iostream.h>
int main()
{int a,b,c,d;
cin>>a>>b>>c>>d;
if(a>=c) cout<<a;
else {while(((a+b)<=c) && ((c-d)>(a+b))) {a+=b; c-=d;}
if((a+b)>c) cout<<c; else cout<<a;}
return 0;}

#include <stdio.h>
int calculate(int a,int b,int c,int d);
void main(){
    int a=0,b=0,c=0,d=0;
    scanf("%d%d%d%d", &a, &b, &c, &d);
    printf("%d\n",calculate(a,b,c,d));
}
int calculate(int a,int b,int c,int d){
    bool m=true;
    if (a>c) return a;
    if (a==c||a+b>c) return c;
    if (c-d<a) return a+b;

    while(1){
        if (m){//c-a>=b){
            a+=b;m=false;
            if (a+b>c-d) return a;
        }
        else if (!m){//&&c-a>=d){
            c-=d;m=true;
            if (c<a+b) return c;
        }
        //else return a;
    }
}

#include <stdio.h>
int calculate(int a,int b,int c,int d);
void main(){
    int a=0,b=0,c=0,d=0;
    scanf("%d%d%d%d", &a, &b, &c, &d);
    printf("%d\n",calculate(a,b,c,d));
}
int calculate(int a,int b,int c,int d){
    bool m=true;
    if (a>c) return a;
    if (a==c||a+b>c) return c;
    if (c-d<a) return a+b;

    while(1){
        if (m&&c-a>=b){
            a+=b;m=false;
            if (a+b>c) return a;
        }
        else if (!m&&c-a>=d){
            c-=d;m=true;
            if (a+b>c) return c;
        }
        else return a;
    }
}

CODE:
var a,b,c,d:word;
begin
{$IFNDEF ONLINE_JUDGE}
   assign(input, 'input.txt');
   reset(input);
   assign(output, 'output.txt');
   rewrite(output);
{$ENDIF}
read(a,b,c,d);
while ((c>=(a+b)) and (a<=(c-d))) do begin
a:=a+b;
c:=c-d;
end;
If a<=c then
writeln(c);
If c<a then writeln(a);
{$IFNDEF ONLINE_JUDGE}
   close(input);
   close(output);
{$ENDIF}
end.

Wrong answer    2

for exanmple try test
1000 2 2000 3
answer is 1400
1 2 12 3
6
100 100 150 20
150
2 1 1 1
2
150 50 1000 100
450
What then error?