Submission #35031

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
35031	2017-11-17 12:44:25	dqhungdl	Watching (JOI13_watching)	C++14	100 / 100	519 ms	17724 KiB

watching

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
using namespace std;
int n,P,Q,a[2005],f[2005][2005];
bool Check(int w)
{
    for(int i=0;i<=n;i++)
        for(int j=0;j<=P;j++)
            f[i][j]=1e9;
    f[0][0]=0;
    for(int i=1;i<=n;i++)
    {
        int id1,id2;
        for(int j=1;j<=i;j++)
            if(a[i]-a[j]+1<=w)
            {
                id1=j;
                break;
            }
        for(int j=1;j<=i;j++)
            if(a[i]-a[j]+1<=2*w)
            {
                id2=j;
                break;
            }
        for(int j=1;j<=P;j++)
            f[i][j]=min(f[i][j],f[id1-1][j-1]);
        for(int j=0;j<=P;j++)
            f[i][j]=min(f[i][j],f[id2-1][j]+1);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

watching.cpp: In function 'bool Check(int)':
watching.cpp:14:17: warning: 'id2' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int id1,id2;
                 ^
watching.cpp:14:13: warning: 'id1' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int id1,id2;
             ^
watching.cpp: In function 'int main()':
watching.cpp:58:14: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout<<res;
              ^

• Subtask 1: 50 / 50
• Subtask 2: 50 / 50