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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 |
---|---|---|---|---|---|---|---|---|---|
#420273 | #4887. Fast Bridges | Harry27182 | TL | 585ms | 38356kb | C++14 | 3.1kb | 2024-05-24 16:04:30 | 2024-05-24 16:04:32 |
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);}
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;
}
詳細信息
Test #1:
score: 100
Accepted
time: 8ms
memory: 31740kb
input:
2 2 1 1 2 2 1 2 2 1
output:
6
result:
ok answer is '6'
Test #2:
score: 0
Accepted
time: 6ms
memory: 27544kb
input:
0 1000000000
output:
916520226
result:
ok answer is '916520226'
Test #3:
score: 0
Accepted
time: 0ms
memory: 33520kb
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: 0ms
memory: 31724kb
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: 27ms
memory: 32492kb
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: 29ms
memory: 34104kb
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: 36ms
memory: 36028kb
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: 86ms
memory: 33776kb
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: 0
Accepted
time: 585ms
memory: 38356kb
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:
230090667
result:
ok answer is '230090667'
Test #10:
score: -100
Time Limit Exceeded
input:
500 1000000000 536804949 618264275 757262973 133194920 206604343 420304040 244005624 331707206 64548973 877773848 685024560 565782395 13572244 271309598 835979107 128627415 128103153 561746493 703898577 9276472 209282309 997406956 216339996 279878227 386095652 999498735 908610032 582414132 232191790...