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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#18887 | #1877. Matryoshka Dolls | AFewSuns | WA | 266ms | 14020kb | C++98 | 3.5kb | 2022-01-27 14:26:04 | 2022-05-06 03:05:01 |
Judging History
answer
#include<bits/stdc++.h>
#define LC x<<1
#define RC x<<1|1
#define il inline
#define inf 1e9
#define ll int
using namespace std;
ll n,m,a[500050],pos[500050];
ll ans[1010][1010],tree[2000020];
ll c,len,blg[500050],lhakioi=0;
struct node{
ll l,r,id,lmhakioi;
}q[500050];
il void sub1(){
for(ll i=1;i<=m;i++){
ll ql,qr,lst=0,ans=0;
scanf("%d %d",&ql,&qr);
for(ll j=1;j<=n;j++) pos[j]=0;
for(ll j=ql;j<=qr;j++) pos[a[j]]=j;
for(ll i=1;i<=n;i++){
if(pos[i]){
if(lst) ans+=abs(pos[i]-pos[lst]);
lst=i;
}
}
printf("%d\n",ans);
}
}
il void pushup(ll x){
tree[x]=tree[LC]+tree[RC];
}
void mdf(ll x,ll l,ll r,ll pos,ll v){
if(l==r){
tree[x]+=v;
return;
}
ll mid=(l+r)>>1;
if(pos<=mid) mdf(LC,l,mid,pos,v);
else mdf(RC,mid+1,r,pos,v);
pushup(x);
}
ll query(ll x,ll l,ll r,ll ql,ll qr){
if(ql>qr) return 0;
if(ql<=l&&r<=qr) return tree[x];
ll mid=(l+r)>>1,res=0;
if(ql<=mid) res+=query(LC,l,mid,ql,qr);
if(mid<qr) res+=query(RC,mid+1,r,ql,qr);
return res;
}
il ll get_pre(ll x){
ll l=1,r=x-1,tmp=query(1,1,n,l,r);
if(!tmp) return -inf;
while(l<r){
ll mid=(l+r+1)>>1;
tmp=query(1,1,n,mid,r);
if(tmp) l=mid;
else r=mid-1;
}
return l;
}
il ll get_nxt(ll x){
ll l=x+1,r=n,tmp=query(1,1,n,l,r);
if(!tmp) return inf;
while(l<r){
ll mid=(l+r)>>1;
tmp=query(1,1,n,l,mid);
if(tmp) r=mid;
else l=mid+1;
}
return l;
}
il void sub6(){
for(ll i=1;i<=n;i++){
ll now=0;
for(ll j=i;j<=n;j++){
pos[a[j]]=j;
mdf(1,1,n,a[j],1);
ll pree=get_pre(a[j]),nxtt=get_nxt(a[j]);
if(pree!=-inf) now+=abs(pos[pree]-j);
if(nxtt!=inf) now+=abs(pos[nxtt]-j);
if(pree!=-inf&&nxtt!=inf) now-=abs(pos[pree]-pos[nxtt]);
ans[i][j]=now;
}
for(ll j=i;j<=n;j++){
pos[a[j]]=0;
mdf(1,1,n,a[j],-1);
}
}
for(ll i=1;i<=m;i++){
ll ql,qr;
scanf("%d %d",&ql,&qr);
printf("%d\n",ans[ql][qr]);
}
}
il bool cmp(node x,node y){
if(blg[x.l]==blg[y.l]){
if(blg[x.l]&1) return x.r<y.r;
else return x.r>y.r;
}
return blg[x.l]<blg[y.l];
}
il bool ztcakioi(node x,node y){
return x.id<y.id;
}
il void ins(ll p){
pos[a[p]]=p;
mdf(1,1,n,a[p],1);
ll pree=get_pre(a[p]),nxtt=get_nxt(a[p]);
if(pree!=-inf) lhakioi+=abs(pos[pree]-p);
if(nxtt!=inf) lhakioi+=abs(pos[nxtt]-p);
if(pree!=-inf&&nxtt!=inf) lhakioi-=abs(pos[pree]-pos[nxtt]);
}
il void del(ll p){
pos[a[p]]=0;
mdf(1,1,n,a[p],-1);
ll pree=get_pre(a[p]),nxtt=get_nxt(a[p]);
if(pree!=-inf) lhakioi-=abs(pos[pree]-p);
if(nxtt!=inf) lhakioi-=abs(pos[nxtt]-p);
if(pree!=-inf&&nxtt!=inf) lhakioi+=abs(pos[pree]-pos[nxtt]);
}
il void sub(){
len=sqrt(n);
if(n%len==0) c=n/len;
else c=n/len+1;
for(int i=1;i<=c;i++){
for(int j=1;j<=len;j++){
ll tmp=(i-1)*len+j;
if(tmp>n) break;
blg[tmp]=i;
}
}
for(ll i=1;i<=m;i++){
scanf("%d %d",&q[i].l,&q[i].r);
q[i].id=i;
}
sort(q+1,q+m+1,cmp);
ll l=1,r=0;
for(ll i=1;i<=m;i++){
while(r<q[i].r){
r++;
ins(r);
}
while(l>q[i].l){
l--;
ins(l);
}
while(r>q[i].r){
del(r);
r--;
}
while(l<q[i].l){
del(l);
l++;
}
q[i].lmhakioi=lhakioi;
}
sort(q+1,q+m+1,ztcakioi);
for(ll i=1;i<=m;i++) printf("%d\n",q[i].lmhakioi);
}
ll main(){
// freopen("rrads.in","r",stdin);
// freopen("rrads.out","w",stdout);
scanf("%d %d",&n,&m);
for(ll i=1;i<=n;i++) scanf("%d",&a[i]);
if(n<=1000&&m<=1000) sub1();
else if(m==n*(n-1)/2) sub6();
else sub();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 7880kb
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: 7760kb
input:
1 1 1 1 1
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: -100
Wrong Answer
time: 266ms
memory: 14020kb
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'