QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#420250 | #4887. Fast Bridges | Harry27182 | WA | 40ms | 39568kb | C++14 | 3.8kb | 2024-05-24 15:50:30 | 2024-05-24 15:50:31 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int inv6=166374059,mod=998244353;
int tot1,tot2,n,m,x[1005],y[1005],ans,e[1005][1005],vis[1005],val[1005],dp[2][1005][1005],lst[1005];
struct node{int x1,y1,x2,y2;}a[1005],b[1005];vector<pair<int,int> >v[1005];vector<int>mp[1005][1005];
void Add(int &x,int y){x=(x+y>=mod?x+y-mod:x+y);}
struct DS
{
set<int>s;int val[1005],ans,len;
void init(int x)
{
for(int i=1;i<=tot2;i++)val[i]=0;
s.clear();ans=0;len=x;
}
void upd(int k,int v)
{
if(v==0)return;
if(!s.size()){s.insert(k);val[k]=v;Add(ans,1ll*(y[tot2]-y[k])*v%mod*len%mod);return;}
auto it=s.upper_bound(k);
if(it!=s.begin()&&val[*prev(it)]>=v)return;
if(it!=s.begin())Add(ans,mod-1ll*val[*prev(it)]*((it==s.end()?y[tot2]:y[*it])-y[k])%mod*len%mod);
int flag=0,pos=0;
for(auto it2=it;it2!=s.end();it2=s.erase(it2))
{
if(val[*it2]>v){flag=1;pos=*it2;break;}
Add(ans,mod-1ll*val[*it2]*(next(it2)==s.end()?y[tot2]-y[*it2]:y[*next(it2)]-y[*it2])%mod*len%mod);
}
s.insert(k);val[k]=v;
if(flag==0)Add(ans,1ll*v*(y[tot2]-y[k])%mod*len%mod);
else Add(ans,1ll*v*(y[pos]-y[k])%mod*len%mod);
}
}ds[1005];
void solve(int m)
{
tot1=0,tot2=0;
for(int i=1;i<=m;i++)
{
x[++tot1]=a[i].x1+1;x[++tot1]=a[i].x2;
y[++tot2]=a[i].y1+1;y[++tot2]=a[i].y2;
}
x[++tot1]=1;x[++tot1]=n+1;y[++tot2]=1;y[++tot2]=n+1;
sort(x+1,x+tot1+1);sort(y+1,y+tot2+1);
tot1=unique(x+1,x+tot1+1)-x-1;tot2=unique(y+1,y+tot2+1)-y-1;
for(int i=1;i<=tot1;i++)for(int j=1;j<=tot2;j++)mp[i][j].clear();
for(int i=1;i<=m;i++)
{
a[i].x1=lower_bound(x+1,x+tot1+1,a[i].x1+1)-x;
a[i].x2=lower_bound(x+1,x+tot1+1,a[i].x2)-x;
a[i].y1=lower_bound(y+1,y+tot2+1,a[i].y1+1)-y;
a[i].y2=lower_bound(y+1,y+tot2+1,a[i].y2)-y;
mp[a[i].x1-1][a[i].y1-1].emplace_back(i);
}
for(int i=1;i<=m;i++)for(int j=1;j<=m;j++)e[i][j]=-0x3f3f3f3f;
for(int i=1;i<=m;i++)e[i][i]=0;
for(int i=1;i<=m;i++)
{
for(int j=1;j<=m;j++)
{
if(i==j)continue;
if(a[i].x2<a[j].x1&&a[i].y2<a[j].y1)e[i][j]=1;
}
}
for(int k=1;k<=m;k++)
{
for(int i=1;i<=m;i++)
{
for(int j=1;j<=m;j++)e[i][j]=max(e[i][j],e[i][k]+e[k][j]);
}
}
for(int i=1;i<tot1;i++)for(int j=1;j<=m;j++)dp[0][i][j]=dp[1][i][j]=0;
for(int i=tot2-1;i>=1;i--)
{
int p=i&1;
for(int j=1;j<tot1;j++)for(int k=1;k<=m;k++)dp[p][j][k]=0;
for(int j=tot1-1;j>=1;j--)
{
for(int k=1;k<=m;k++)
{
dp[p][j][k]=max(dp[p][j+1][k],dp[p^1][j][k]);
for(int l=0;l<mp[i][j].size();l++)
{
int x=mp[i][j][l];
dp[p][j][k]=max(dp[p][j][k],e[x][k]+1);
}
}
for(int k=1;k<tot2;k++)v[k].clear();
for(int k=1;k<=m;k++)
{
if(dp[p][j][k]>0)v[a[k].y2].emplace_back(make_pair(a[k].x2,dp[p][j][k]));
}
for(int k=1;k<=m;k++)lst[k]=0;
for(int k=1;k<tot2;k++)
{
for(int j=0;j<v[k].size();j++)
{
int len=x[tot1]-x[v[k][j].first],w=v[k][j].second;
if(lst[w]>=len)continue;
ans-=lst[w]*(y[tot2]-y[k]);
ans+=len*(y[tot2]-y[k]);lst[w]=len;
}
}
}
}
}
int main()
{
//freopen("line.in","r",stdin);
//freopen("line.out","w",stdout);
cin.tie(0)->sync_with_stdio(0);
cin>>m>>n;int flag=0;
for(int i=1;i<=m;i++)cin>>b[i].x1>>b[i].y1>>b[i].x2>>b[i].y2,flag&=(b[i].y1<b[i].y2);
for(int i=1;i<m;i++)flag&=(b[i].x2<=b[i+1].x1&&b[i].y2<=b[i+1].y1);
if(flag==1)
{
for(int i=1;i<=m;i++)Add(ans,1ll*b[i].x1*b[i].y1%mod*(n-b[i].x2+1)%mod*(n-b[i].y2+1)%mod);
}
else
{
int cnt=0;
for(int i=1;i<=m;i++)if(b[i].x1!=b[i].x2&&b[i].y1<b[i].y2)a[++cnt]=b[i];
solve(cnt);cnt=0;
for(int i=1;i<=m;i++)b[i].y1=n-b[i].y1+1,b[i].y2=n-b[i].y2+1;
for(int i=1;i<=m;i++)if(b[i].x1!=b[i].x2&&b[i].y1<b[i].y2)a[++cnt]=b[i];
solve(cnt);
}
int res=1ll*n*n%mod*(n-1)%mod*n%mod*(n+1)%mod*inv6%mod*2%mod;
res=(res-ans+mod)%mod;
cout<<res;
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 36676kb
input:
2 2 1 1 2 2 1 2 2 1
output:
6
result:
ok answer is '6'
Test #2:
score: 0
Accepted
time: 0ms
memory: 32428kb
input:
0 1000000000
output:
916520226
result:
ok answer is '916520226'
Test #3:
score: 0
Accepted
time: 0ms
memory: 37252kb
input:
5 5 1 1 3 3 3 3 5 1 3 3 4 5 3 3 5 4 1 5 3 3
output:
946
result:
ok answer is '946'
Test #4:
score: 0
Accepted
time: 6ms
memory: 37244kb
input:
200 5 1 1 4 2 2 5 4 4 2 3 4 2 2 4 3 5 1 4 4 2 2 5 4 2 1 2 4 4 1 2 2 4 1 4 5 1 3 4 5 1 4 2 5 1 2 2 5 4 3 2 5 1 3 1 5 2 4 2 5 3 1 3 5 1 3 4 4 5 2 2 4 3 2 3 5 4 1 4 5 3 2 2 3 1 2 5 3 3 1 1 5 3 4 4 5 5 1 3 4 4 4 3 5 1 2 3 3 4 3 4 4 2 1 4 4 5 2 1 4 4 1 3 5 2 1 1 3 3 1 5 3 1 1 1 3 5 1 4 3 5 4 5 5 4 1 1 4 ...
output:
708
result:
ok answer is '708'
Test #5:
score: 0
Accepted
time: 32ms
memory: 36524kb
input:
500 10 5 6 7 10 1 3 8 10 3 3 4 9 2 10 10 2 9 4 10 10 5 4 7 8 7 1 10 7 3 1 7 10 5 2 8 9 6 3 7 10 3 10 7 9 4 9 5 1 2 5 3 3 7 10 8 2 7 7 9 8 6 6 8 3 5 10 8 8 1 1 5 5 3 3 10 5 5 5 7 6 3 8 4 7 6 7 7 5 7 3 10 9 5 3 9 4 4 6 10 5 1 5 9 10 5 6 9 7 3 10 10 3 1 2 5 7 4 6 5 1 3 1 8 5 5 8 8 9 1 8 4 3 6 4 7 10 7 ...
output:
27373
result:
ok answer is '27373'
Test #6:
score: 0
Accepted
time: 26ms
memory: 39568kb
input:
500 30 3 13 20 29 14 5 16 25 2 29 9 15 23 30 24 9 1 18 24 28 4 16 5 2 3 29 30 25 4 8 24 19 8 26 10 24 20 14 26 25 15 8 25 25 5 13 18 28 3 30 29 10 14 26 25 11 11 19 16 4 9 4 29 30 15 10 16 8 2 29 12 2 11 22 20 28 4 10 28 1 24 17 30 1 8 26 27 9 15 25 30 14 16 20 24 17 9 23 12 13 9 16 25 28 2 15 8 16 ...
output:
7717993
result:
ok answer is '7717993'
Test #7:
score: -100
Wrong Answer
time: 40ms
memory: 36532kb
input:
500 100 25 55 55 43 14 22 84 5 57 7 79 15 63 9 86 23 22 3 53 97 2 22 64 65 32 52 66 30 76 37 79 22 46 100 76 22 21 78 78 44 29 41 92 55 43 14 46 3 14 97 42 1 16 7 35 64 15 27 29 3 11 92 92 70 4 13 66 2 3 38 55 82 41 94 83 44 52 90 100 82 6 100 99 70 18 38 24 22 74 17 98 20 17 94 44 82 33 97 48 19 12...
output:
292487133
result:
wrong answer expected '291628571', found '292487133'