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ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#842431 | #9963. Express Rotations | ucup-team1004# | WA | 67ms | 44084kb | C++14 | 3.1kb | 2025-01-04 12:50:05 | 2025-01-04 12:50:06 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
const ll inf=2e18;
const int N=1e6+10;
int n,a[N],b[N];
vi t[N];
ll f1[N],f[N],f2[N];
void gmin(ll &a,ll b){a=min(a,b);}
struct{
ll t[N],s;
void add(int x,int a){for(;x<=n;t[x]+=a,x+=x&(-x));}
ll sum(int x){for(s=0;x;s+=t[x],x-=x&(-x));return s;}
}t1,t2;
ll go1(int x,int y)//x->y x->n 1->y
{
if(x<=y) return t1.sum(y-1)-t1.sum(x-1);
else return go1(x,n+1)+go1(1,y);
// if(x<y) return go1(x,0)+go1(n,y);
// else return bit::sum(x)-bit::sum(y);
}
ll go2(int x,int y)//y<-x
{
if(x>=y) return t2.sum(x-1)-t2.sum(y-1);
else return go2(x,1)+go2(n+1,y);
// if(x>y) return go2(x,n)+go2(0,y);
// else return bit::sum(y)-bit::sum(x);
}
ll go(int x,int y){return min(go1(x,y),go2(x,y));}
ll calc(int x,int y){return f[x]+go1(x,y);}
void trans1(vi a,int val)//right-left
{
int m=a.size();
for(int i:a) t1.add(i,-val),f1[i]=f[i];
for(int i=1,j=0;i<m;i++)
{
if(f[a[i]]>calc(a[j],a[i]))
f1[a[i]]=calc(a[j],a[i]);
else j=i;
}
for(int i=m-2,j=m-1;i>=0;i--)
{
if(calc(a[j],a[i])>calc(a[i+1],a[i])) j=i+1;
gmin(f1[a[i]],calc(a[j],a[i]));
}
for(int i=0;i<m;i++)
{
int x=a[(i+1)%m];
f2[x]=f1[a[i]]+go2(a[i],x);
}
for(int i:a) t1.add(i,val);
}
void trans2(vi a)//left-right
{
int m=a.size();
for(int i:a) f1[i]=f[i];
for(int c=0;c<2;c++)
for(int i=m-1;i>=0;i--)
{
int x=a[(i-1+m)%m];
gmin(f1[x],f1[a[i]]+go2(a[i],x));
}
for(int i=0;i<m;i++)
{
int x=a[(i+1)%m];
f[a[i]]=f1[x]+go1(x,a[i]);
}
}
void trans3(vi a,vi b)
{
for(int x:b) f[x]=inf;
int n1=a.size(),n2=b.size();
for(int x:b)
gmin(f[x],f[a[0]]+go(a[0],x)),
gmin(f[x],f[a.back()]+go(a.back(),x));
vector<pair<int,int>> v;
for(auto x:a) v.push_back({x,1});
for(int x:b) v.push_back({x,2});
sort(v.begin(),v.end());
for(int i=0,lst=-1;i<n1+n2;i++)
{
if(v[i].second==1) lst=v[i].first;
else if(lst!=-1) gmin(f[v[i].first],f[lst]+go1(lst,v[i].first));
}
reverse(v.begin(),v.end());
for(int i=0,lst=-1;i<n1+n2;i++)
{
if(v[i].second==1) lst=v[i].first;
else if(lst!=-1) gmin(f[v[i].first],f[lst]+go2(lst,v[i].first));
}
}
void trans4(vi a)
{
int m=a.size();
for(int c=0;c<2;c++)
for(int i=0;i<m;i++)
{
int x=a[(i+1)%m];
gmin(f[x],f[a[i]]+go1(a[i],x));
}
for(int c=0;c<2;c++)
for(int i=m-1;i>=0;i--)
{
int x=a[(i-1+m)%m];
gmin(f[x],f[a[i]]+go2(a[i],x));
}
}
int main()
{
scanf("%d",&n);
for(int i=1;i<=n;i++) scanf("%d",&a[i]),b[i]=a[i];
sort(b+1,b+n+1);
int m=unique(b+1,b+n+1)-b-1;
for(int i=1;i<=n;i++)
a[i]=lower_bound(b+1,b+m+1,a[i])-b,t[a[i]].push_back(i);
for(int i=1;i<=n;i++) t1.add(i,b[a[i]]),t2.add(i,b[a[i]]);
for(int i=m;i;i--)
{
for(int j:t[i]) t1.add(j,-b[a[j]]);
if(i<m) trans3(t[i+1],t[i]);
else for(int y:t[i]) f[y]=go(1,y);
trans1(t[i],i);
trans2(t[i]);
for(int j:t[i]) gmin(f[j],f2[j]);
for(int j:t[i]) t2.add(j,-b[a[j]]);
trans4(t[i]);
}
ll ans=1e18;
for(auto x:t[1]) ans=min(ans,f[x]);
// for(int i=1;i<=n;i++) printf("%lld\n",f[i]);
printf("%lld\n",ans);
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 38616kb
input:
6 6 10 6 5 4 5
output:
16
result:
ok 1 number(s): "16"
Test #2:
score: 0
Accepted
time: 3ms
memory: 40624kb
input:
1 525434
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 3ms
memory: 40620kb
input:
20 724315 660084 703741 660084 33388 703741 724315 608476 703741 33388 660084 33388 703741 703741 724315 33388 660084 703741 703741 33388
output:
10450373
result:
ok 1 number(s): "10450373"
Test #4:
score: 0
Accepted
time: 0ms
memory: 38536kb
input:
1000 205212 781871 811133 847754 365647 686203 781871 811133 205212 811133 365647 553550 205212 365647 811133 205212 205212 781871 875225 781871 365647 344701 205212 875225 365647 365647 811133 781871 875225 811133 781871 365647 553550 686203 365647 79214 553550 686203 781871 781871 875225 811133 20...
output:
1703022119
result:
ok 1 number(s): "1703022119"
Test #5:
score: 0
Accepted
time: 6ms
memory: 40652kb
input:
1000 301641 35540 535041 598876 422289 932926 891853 928749 403425 515013 323155 468767 875308 397761 252409 674812 40987 889920 172600 98116 799381 718712 739731 228116 729441 314232 916892 391198 205018 977734 406583 970126 527675 752117 616274 614112 241590 226939 726732 976461 657267 705600 9482...
output:
40529669812
result:
ok 1 number(s): "40529669812"
Test #6:
score: -100
Wrong Answer
time: 67ms
memory: 44084kb
input:
100000 94951 895049 212507 728671 498212 74168 617364 727973 327553 437083 222970 617364 575451 478998 352348 386134 274500 366753 57576 139115 368828 29040 930954 301558 521133 343205 520174 291315 53520 354416 89181 852743 480847 499918 602700 770649 61483 524841 957354 355385 376270 327553 402615...
output:
8404793095290
result:
wrong answer 1st numbers differ - expected: '8404763653182', found: '8404793095290'