if you get WA on test #2, then try to use unsigned char* instead char*

2
'like' like 'like'
''' '' ' like ''' ''%'

YES
YES

Tests may also have spaces, so it is a confusing question to determine how to get the string and the pattern.
I got 14 WA on this question, and finally AC. QWQ

Edited by author 14.10.2015 20:17

Try this test:

2 1
1 3

answer:

2 3
1 4

from math import sqrt

n = int(input())
l = list(map(int, input().split()))
t = []
for i in range(n):
    for j in range(n):
        if l[i] == l[j]:
            t.append(l[i])
l = 0
for i in range(len(t)):
    if t[i] != l:
        print(int(sqrt(t.count(t[i]))),t[i], end=' ')
        l = t[i]

что за тест в чем ошибка?

I haven't idea how to approach this test?
my code is simple O(n^4),but #9 test doesn' work:

for (i=1;i<=n;i++)
    {
        for (j=1;j<=n;j++)

            s[i][j]=s[i-1][j]+s[i][j-1]+a[i][j]-s[i-1][j-1];



    }
    for (i=1;i<=n;i++)
        for (j=1;j<=n;j++)
        {
            for (k=i;k<=n;k++)
            {
                for (m=j;m<=n;m++)
                {
                    sum=s[k][m]-s[i-1][m]-s[k][j-1]+s[i-1][j-1];

                    if (sum>max1) max1=sum;

                }
            }
        }

getting WA9
What can be the problem ?

It's too funy!

I forgot to check one little moment

if(goods[v[0].s] == 0){
   time++;
   v.pop_front();
   continue;
}

Or try this test:

1
1 of hell

3
1 of lol
2 of azaz
3 of bug

Answer: 3, but my old programm gives 5 LOL, Good Luck!

Почему не проходит тест? Вроде все правильно

WA in Case #6.
Could you give me the case?

Edited by author 11.10.2015 17:59

Edited by author 11.10.2015 17:44

Just print:
1)2*n-1
2)1 2 ... n
3)n n-1 ... 2

Please help me, what is wrong with my solution....
Const
 MaxN = 100000;
Var
 b : array[1..MaxN] of boolean;
 c : array[1..2,1..MaxN] of longint;
 c_num,n,m,i,x,y : longint;
BEGIN
 Readln(n,m);
 Fillchar(b,sizeof(b),true);
 Fillchar(c,sizeof(c),0);
 c_num := 0;
 For i := 1 to m do
  begin
   Read(x,y);
   if b[x] and b[y] then
    Begin
     Inc(c_num);
     c[1][c_num] := x;
     c[2][c_num] := y;
     b[x] := false;
     b[y] := false;
    End;
  End;
 Writeln(c_num);
 For i := 1 to C_num do
  Begin
   Writeln(c[1][i],' ',c[2][i]);
  End;
END.

Кто решил,напишите пару тестов.

import sys

def wall_scaner(amount, wall):
    count = 0
    high = 0
    mid_number = ''
    while count < int(amount) - 2:
        summ = 0
        unit = wall[count:count + 3]
        for i in unit:
            summ += int(i)
        if summ > high:
            high = summ
            mid_number = count + 2
        count += 1
    return high, mid_number

data1 = sys.stdin.readline()
data2 = sys.stdin.readline()
amount = ''.join(data1.split())
wall = ''.join(data2.split())
answer = wall_scaner(amount, wall)
print(answer[0], answer[1])

plz tell me what's wrong
this code always return right format and answer for me

What's wrong?
Please, answer me.

#include <iostream>
#include <vector>
using namespace std;

int main() {
    bool z;
    vector <int> so(0), st(0);
    unsigned int a;
    cin >> a;
    while (so.size() < a) {
        int soe;
        cin >> soe;
        so.push_back(soe);
    }
    unsigned int b;
    cin >> b;
    while (st.size() < b) {
        int ste;
        cin >> ste;
        st.push_back(ste);
    }

    for (unsigned int i = 0; i < so.size(); i++)
        for (unsigned int j = 0; j < st.size(); j++) {
            if (so[i] + st[j] == 10000) {
                z = true;
            }
        }
    if (z == true) {
        cout << "YES" << endl;
    }
    else {
        cout << "NO" << endl;
    }

}

Edited by author 24.10.2015 04:23

New test was added, 1158 AC solutions failed.

Hi there,

My AC code (and, I think, many others) outputs "-1" for the following test, whereas according to the problem statement right answer is "3":

1 5
+-+-+-+.+-+
| | .1|2| |
+-+.+-+-+-+

It seems this problem needs more good tests.

I thought ranking was determined first by solution time, with ties broken by submission date.   But you can see here: http://acm.timus.ru/rating.aspx?space=1&num=1797  that the #1 ranked solution has the same solution time as the other top submissions, but a later submission date.    Why is this?

There are too many different cases to consider, use a brute-force approach to get AC on the first attempt with one page of code:

1) write a function that checks that the situation is good;

2) for every coordinate make a list of four interesting values (all values taken by existing potatoes and some others if this is not enough);

3) try all possible ways to move none, one, or two potatoes, so that the coordinates of the new position are from the interesting values.