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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#19111 | #1877. Matryoshka Dolls | Forza_Ferrari | RE | 3ms | 9936kb | C++14 | 2.9kb | 2022-01-28 10:45:18 | 2022-05-06 04:14:31 |
Judging History
answer
#include<iostream>
#include<cstdio>
#include<set>
#include<cmath>
#include<algorithm>
using namespace std;
int n,m,a[500001],block,p[500001],pos[500001];
long long ans[500001],dp[1001][1001],sum;
struct element
{
int l,r,id;
bool operator <(const element &other) const
{
return pos[l]^pos[other.l]? pos[l]<pos[other.l]:pos[l]&1? r<other.r:r>other.r;
}
}q[500001];
set<int> s[1001],tmp;
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 int Abs(int x)
{
return x>=0? x:-x;
}
inline void insert(int x)
{
set<int>::iterator nxt=tmp.upper_bound(x);
if(nxt!=tmp.end())
sum+=Abs(p[x]-p[*nxt]);
if(nxt!=tmp.begin())
{
set<int>::iterator pre=prev(nxt);
sum+=Abs(p[x]-p[*pre]);
if(nxt!=tmp.end())
sum-=Abs(p[*nxt]-p[*pre]);
}
tmp.insert(x);
}
inline void del(int x)
{
set<int>::iterator it=tmp.lower_bound(x),nxt=next(it);
if(nxt!=tmp.end())
sum-=Abs(p[x]-p[*nxt]);
if(it!=tmp.begin())
{
set<int>::iterator pre=prev(it);
sum-=Abs(p[x]-p[*pre]);
if(nxt!=tmp.end())
sum+=Abs(p[*nxt]-p[*pre]);
}
tmp.erase(it);
}
inline void solve()
{
for(int i=1;i<=n;++i)
{
p[a[i]=read()]=i;
s[i].insert(a[i]);
}
for(int len=2;len<=n;++len)
for(int i=1,j=len;j<=n;++i,++j)
{
dp[i][j]=dp[i][j-1];
set<int>::iterator nxt=s[i].upper_bound(a[j]);
if(nxt!=s[i].end())
dp[i][j]+=Abs(j-p[*nxt]);
if(nxt!=s[i].begin())
{
set<int>::iterator pre=prev(nxt);
dp[i][j]+=Abs(j-p[*pre]);
if(nxt!=s[i].end())
dp[i][j]-=Abs(p[*nxt]-p[*pre]);
}
s[i].insert(a[j]);
}
while(m--)
{
int l=read(),r=read();
printf("%lld\n",dp[l][r]);
}
}
int main()
{
n=read(),m=read();
//if(m==1ll*n*(n-1)/2)
{
solve();
return 0;
}
block=sqrt(n);
for(int i=1;i<=n;++i)
{
p[a[i]=read()]=i;
pos[i]=(i-1)/block+1;
}
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;i<=m;++i)
{
for(;r<q[i].r;++r)
insert(a[r+1]);
for(;l>q[i].l;--l)
insert(a[l-1]);
for(;r>q[i].r;--r)
del(a[r]);
for(;l<q[i].l;++l)
del(a[l]);
//for(auto j:tmp)
//cout<<j<<" ";
//cout<<endl;
ans[q[i].id]=sum;
}
for(int i=1;i<=m;++i)
printf("%lld\n",ans[i]);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 9936kb
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: 3ms
memory: 5808kb
input:
1 1 1 1 1
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: -100
Runtime Error
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 ...