QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#420263 | #4887. Fast Bridges | Harry27182 | WA | 579ms | 36616kb | C++14 | 3.9kb | 2024-05-24 15:56:48 | 2024-05-24 15:56:52 |
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;
int res=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;
Add(res,mod-1ll*lst[w]*(y[tot2]-y[k])%mod);
Add(res,1ll*len*(y[tot2]-y[k])%mod);lst[w]=len;
}
}
Add(ans,1ll*res*(x[i+1]-x[i])%mod*(y[j+1]-y[j])%mod);
}
}
}
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: 3ms
memory: 32592kb
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: 32212kb
input:
0 1000000000
output:
916520226
result:
ok answer is '916520226'
Test #3:
score: 0
Accepted
time: 0ms
memory: 32212kb
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: 7ms
memory: 32120kb
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: 30ms
memory: 34248kb
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: 31ms
memory: 34544kb
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: 0
Accepted
time: 35ms
memory: 34328kb
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:
291628571
result:
ok answer is '291628571'
Test #8:
score: 0
Accepted
time: 88ms
memory: 33756kb
input:
500 8 2 4 8 2 3 7 5 4 2 6 8 1 4 8 5 5 6 6 7 5 2 6 5 5 1 6 8 5 6 5 7 3 4 8 5 7 5 7 6 5 1 6 4 5 2 3 4 2 2 8 8 6 3 8 4 3 5 6 7 2 7 8 8 3 1 8 4 7 1 6 6 1 1 8 7 1 1 4 3 3 2 3 3 1 1 4 5 1 1 8 5 4 7 7 8 5 2 7 4 1 3 7 4 3 2 3 5 1 3 7 8 1 4 7 5 5 6 6 8 3 2 7 5 1 2 5 4 3 5 4 8 2 4 5 8 3 2 3 4 1 2 8 3 2 5 6 8 ...
output:
9321
result:
ok answer is '9321'
Test #9:
score: -100
Wrong Answer
time: 579ms
memory: 36616kb
input:
500 1000000000 228604634 522874974 789854111 585676486 340802063 175643637 661594207 749079321 490078806 844144515 583746323 707696611 833939453 901516824 867397264 848066012 553537526 886003963 679012061 187030606 351500555 847099665 751201742 855105070 169763646 729114554 248951243 211939611 17040...
output:
258787181
result:
wrong answer expected '230090667', found '258787181'