oj.uz

Submission #169085

# Submission time Handle Problem Language Result Execution time Memory
169085 2019-12-18T11:09:12 Z HuyQuang_re_Zero Stove (JOI18_stove) C++14
100 / 100
 281 ms 83052 KB 
#include <bits/stdc++.h>
using namespace std;
long long n,m,i,j,k,t[100001],kq,d[1001],f[5001][5001];
void vet(int i,int sl)
{
    if(sl>m) return ;
    if(i>n)
    {
        long long sum=0,vt;
        for(int j=1;j<=n;j++)
        {
            if(d[j]==1) vt=t[j];
            if(j==n || d[j+1]==1) sum+=t[j]+1-vt;
        }
        kq=min(kq,sum);
        return ;
    }
    if(i==1) { d[i]=1; vet(i+1,sl+1); }
    else
    {
        for(int j=0;j<=1;j++)
        {
            d[i]=j;
            vet(i+1,sl+j);
        }
    }
}
void sub1()
{
    kq=round(1e9);
    vet(1,0);
    cout<<kq;
}

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

const long long oo=round(1e18);

void sub2()
{
    for(i=0;i<=n;i++)
        for(k=0;k<=m;k++) f[i][j]=oo;
    f[0][0]=0;
    for(k=1;k<=n;k++)
    {
        long long mi=oo;
        for(i=0;i<=n;i++)
        {
            if(i>0 && mi<oo) f[i][k]=mi+t[i]+1;
            if(i<n && f[i][k-1]<oo) mi=min(mi,f[i][k-1]-t[i+1]);
        }
    }
    cout<<f[n][m];
}

/////////////////////////////////////////////////////////////////////
int b[100001];
void sub3()
{
    int sl=0;
    for(i=2;i<=n;i++) b[++sl]=t[i]-(t[i-1]+1);
    sort(b+1,b+sl+1);
    long long sum=0;
    for(i=sl;i>=sl-(m-1)+1;i--) sum+=b[i];
    cout<<t[n]+1-t[1]-sum;
}
int main()
{
    //freopen("stove.inp","r",stdin);
    //freopen("stove.out","w",stdout);
    cin>>n>>m;
    for(i=1;i<=n;i++) cin>>t[i];
    if(n<=20) sub1();
    else if(n<=5000) sub2();
    else sub3();
}

Compilation message

stove.cpp: In function 'void vet(int, int)':
stove.cpp:13:46: warning: 'vt' may be used uninitialized in this function [-Wmaybe-uninitialized]
             if(j==n || d[j+1]==1) sum+=t[j]+1-vt;
                                        ~~~~~~^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 424 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 24 ms 372 KB Output is correct
9 Correct 2 ms 376 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 424 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 24 ms 372 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 256 ms 82968 KB Output is correct
11 Correct 264 ms 82936 KB Output is correct
12 Correct 247 ms 82936 KB Output is correct
13 Correct 261 ms 83052 KB Output is correct
14 Correct 281 ms 82812 KB Output is correct
15 Correct 235 ms 82932 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 424 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 24 ms 372 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 256 ms 82968 KB Output is correct
11 Correct 264 ms 82936 KB Output is correct
12 Correct 247 ms 82936 KB Output is correct
13 Correct 261 ms 83052 KB Output is correct
14 Correct 281 ms 82812 KB Output is correct
15 Correct 235 ms 82932 KB Output is correct
16 Correct 82 ms 1528 KB Output is correct
17 Correct 82 ms 1484 KB Output is correct
18 Correct 89 ms 1500 KB Output is correct
19 Correct 82 ms 1528 KB Output is correct
20 Correct 89 ms 1520 KB Output is correct
21 Correct 81 ms 1528 KB Output is correct
22 Correct 82 ms 1496 KB Output is correct
23 Correct 82 ms 1528 KB Output is correct
24 Correct 84 ms 1436 KB Output is correct