QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#19045#1877. Matryoshka DollstkyWA 27ms16456kbC++112.1kb2022-01-27 20:18:092022-05-06 03:41:39

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 03:41:39]
  • 评测
  • 测评结果:WA
  • 用时:27ms
  • 内存:16456kb
  • [2022-01-27 20:18:09]
  • 提交

answer

#include<iostream>
#include<cmath>
#include<vector>
#include<algorithm>
#include<unordered_map>
#include<set>
#define um unordered_map
using namespace std;
const int N=2e5+5;
int val[N],id[N],pos[N],tot;
struct interval
{
  int l,r;
  bool operator<(interval b)const
  {
    return r<b.r;
  }
  bool operator==(interval b)const
  {
    return l==b.l&&r==b.r;
  }
};
struct Hash
{
  size_t operator()(interval b)const
  {
    return b.l*N+b.r;
  }
};
vector<interval> a[N];
set<int> s;
um<interval,int,Hash> Map;
interval note[N];
void add(int x)
{
  s.insert(val[x]);
  auto k=s.find(val[x]);
  if(s.size()==1)return;
  if(k==s.begin())
    {
      tot+=abs(id[*k]-id[*(++k)]);
      return;
    }
  auto kkk=k;++kkk;
  if(kkk==s.end())
    {
      tot+=abs(id[*k]-id[*(--k)]);
      return;
    }
  auto kk=k;kk--;
  tot-=abs(id[*kkk]-id[*kk]);
  tot+=abs(id[*k]-id[*kk]);
  tot+=abs(id[*k]-id[*kkk]);
}
void del(int x)
{
  if(!x)return;
  auto k=s.find(val[x]);
  auto kkk=k;kkk++;
  auto kk=k;--kk;
  if(k==s.begin())
    {
      tot-=abs(id[*k]-id[*(kkk)]);
      s.erase(k);
      return;
    }
  if(kkk==s.end())
    {
      tot-=abs(id[*k]-id[*kk]);
      s.erase(k);
      return;
    }
  tot+=abs(id[*kkk]-id[*kk]);
  tot-=abs(id[*k]-id[*kk]);
  tot-=abs(id[*k]-id[*kkk]);
  s.erase(k);
}
int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0),cout.tie(0);
  int n,m;cin>>n>>m;
  int block=sqrt(n);
  for(int i=1;i<=n;++i)cin>>val[i];
  for(int i=1;i<=n;++i)id[val[i]]=i;
  for(int i=1;i<=n;++i)pos[i]=(i-1)/block+1;
  int t=pos[n];
  for(int i=1;i<=m;++i)
    {
      int x,y;cin>>x>>y;
      a[pos[x]].push_back({x,y});
      note[i]={x,y};
    }
  for(int i=1;i<=t;++i)sort(a[i].begin(),a[i].end());
  int l=0,r=0;
  for(int i=1;i<=t;++i)
    for(auto j:a[i])
      {
        while(r<j.r)add(++r);
        while(r>j.r)del(r--);
        while(l<j.l)del(l++);
        while(l>j.l)add(--l);
        Map[{j.l,j.r}]=tot;
      }
  for(int i=1;i<=m;++i)
    cout<<Map[note[i]]<<'\n';
  return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 4ms
memory: 9712kb

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: 9812kb

input:

1 1
1
1 1

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: -100
Wrong Answer
time: 27ms
memory: 16456kb

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'