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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#19285#1877. Matryoshka DollsForza_FerrariWA 2ms16492kbC++142.5kb2022-01-28 21:52:462022-05-06 04:36:18

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-05-06 04:36:18]
  • 评测
  • 测评结果:WA
  • 用时:2ms
  • 内存:16492kb
  • [2022-01-28 21:52:46]
  • 提交

answer

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
using namespace std;
int n,m,a[500001],p[500001],block,pos[500001],s[500001],pre[500001],nxt[500001],sum[500001],ans[500001],res;
struct element
{
    int l,r,id;
    bool operator <(const element &other) const
    {
        return pos[l]^pos[other.l]? pos[l]<pos[other.l]:r>other.r;
    }
}q[500001];
inline int read()
{
    int x=0;
    char c=getchar();
    while(c<'0'||c>'9')
        c=getchar();
    while(c>='0'&&c<='9')
    {
        x=(x<<1)+(x<<3)+(c^48);
        c=getchar();
    }
    return x;
}
inline void print(int x)
{
    if(x>=10)
        print(x/10);
    putchar(x%10+'0');
}
inline int Abs(int x)
{
    return x>=0? x:-x;
}
inline void insert(int x)
{
    ++sum[x];
}
inline void del(int x)
{
    --sum[x];
    if(pre[x])
    {
        res-=Abs(p[pre[x]]-p[x]);
        nxt[pre[x]]=nxt[x];
    }
    if(nxt[x])
    {
        res-=Abs(p[nxt[x]]-p[x]);
        pre[nxt[x]]=pre[x];
    }
    if(pre[x]&&nxt[x])
        res+=Abs(p[pre[x]]-p[nxt[x]]);
    pre[x]=nxt[x]=0;
}
int main()
{
    n=read(),m=read();
    block=sqrt(n);
    for(int i=1;i<=n;++i)
    {
        p[a[i]=read()]=i;
        pos[i]=(i-1)/block+1;
        if(pos[i]^pos[i-1])
            s[pos[i]]=i;
    }
    for(int i=1;i<=m;++i)
    {
        q[i].l=read(),q[i].r=read();
        q[i].id=i;
    }
    sort(q+1,q+m+1);
    for(int i=1,l=1,r=0,lst=0;i<=m;++i)
    {
        if(lst^pos[q[i].l])
        {
            lst=pos[q[i].l];
            for(;l>s[pos[q[i].l]];--l)
                insert(a[l-1]);
            for(;r<n;++r)
                insert(a[r+1]);
            for(;l<s[pos[q[i].l]];++l)
                del(a[l]);
            int k=0;
            res=0;
            for(int j=1;j<=n;++j)
            {
                pre[j]=nxt[j]=0;
                if(sum[j])
                {
                    pre[j]=k;
                    if(k)
                    {
                        nxt[k]=j;
                        res+=Abs(p[j]-p[k]);
                    }
                    k=j;
                }
            }
        }
        for(;r>q[i].r;--r)
            del(a[r]);
        int tmp=res;
        for(;l<q[i].l;++l)
            del(a[l]);
        ans[q[i].id]=res;
        for(;l>s[pos[q[i].l]];--l)
            insert(a[l-1]);
        res=tmp;
    }
    for(int i=1;i<=m;++i)
    {
        print(ans[i]);
        putchar('\n');
    }
    return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 15968kb

input:

5 5
1 5 2 4 3
1 5
1 4
1 3
1 2
1 1

output:

7
5
3
1
0

result:

ok 5 number(s): "7 5 3 1 0"

Test #2:

score: 0
Accepted
time: 2ms
memory: 15864kb

input:

1 1
1
1 1

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: -100
Wrong Answer
time: 1ms
memory: 16492kb

input:

100000 1
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 ...

output:

704982704

result:

wrong answer 1st numbers differ - expected: '4999950000', found: '704982704'