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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#300006 | #7895. Graph Partitioning 2 | ucup-team870# | WA | 14ms | 14040kb | C++14 | 2.1kb | 2024-01-07 16:08:11 | 2024-01-07 16:08:12 |
Judging History
answer
#include<bits/stdc++.h>
#define For(i,l,r) for(int i=l; i<=r; i++)
#define IOS {cin.tie(0);cout.tie(0);ios::sync_with_stdio(0);}
using namespace std;
typedef long long ll;
const int N=1e5+5,mo=998244353;
vector<int> v[N];
//15:15-
int n,k;
typedef pair<int,int> pi;
pi dp[N][655]; int cnt[N];
bool vis[N]; int qu[N],ql; ll w[N];
void add(int x,int y,int z){
dp[x][++cnt[x]]={y,z};
}
void dfs(int x,int fa){
for(auto y:v[x]) if (y!=fa){
dfs(y,x);
}
//init
add(x,1,1);
//merge
for(auto y:v[x]) if (y!=fa){
For(i,1,cnt[x])
For(j,1,cnt[y]){
auto [fx,wx]=dp[x][i];
auto [fy,wy]=dp[y][j]; //cout<<' '<<i<<' '<<j<<'#'<<fx<<' '<<fy<<endl;
if (fx+fy>k+1) continue;
if (!vis[fx+fy]) vis[fx+fy]=1,qu[++ql]=fx+fy;
w[fx+fy]=(1ll*wx*wy+w[fx+fy])%mo;
}
//give and clear
sort(qu+1,qu+1+ql);
cnt[x]=0;
For(i,1,ql){
int tmp=qu[i];
add(x,tmp,w[tmp]);
vis[tmp]=w[tmp]=0;
}
ql=0;
}
//pr
// printf("#%d\n",x);
// For(i,1,cnt[x]){
// printf("%d %d\n",dp[x][i].first,dp[x][i].second);
// }
//cal 0
ll v0=0;
For(i,1,cnt[x]){
auto [fx,wx]=dp[x][i];
if (fx>=k) v0+=wx;
}
//move
if (v0){
for(int i=cnt[x]+1;i>=2;--i) dp[x][i]=dp[x][i-1];
dp[x][1]={0,v0%mo}; ++cnt[x];
if (dp[x][cnt[x]].first>=k+1) --cnt[x];}
//print
// printf("#%d\n",x);
// For(i,1,cnt[x]){
// printf("%d %d\n",dp[x][i].first,dp[x][i].second);
// }
}
int main(){
IOS
int _; cin>>_;
while(_--){
cin>>n>>k;
For(i,1,n-1){
int x,y; cin>>x>>y;
v[x].push_back(y),v[y].push_back(x);
}
dfs(1,0);
cout<<dp[1][1].second<<'\n';
//clear
For(i,1,n) v[i].clear(),cnt[i]=0;
}
return 0;
}
/*
4
4 1
1 2 1 3 2 4
3 1
1 2 1 3
8 2
1 2
3 1
4 6
3 5
2 4
8 5
5 7
4 3
1 2
1 3
2 4
*/
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 7528kb
input:
2 8 2 1 2 3 1 4 6 3 5 2 4 8 5 5 7 4 3 1 2 1 3 2 4
output:
2 1
result:
ok 2 lines
Test #2:
score: -100
Wrong Answer
time: 14ms
memory: 14040kb
input:
5550 13 4 10 3 9 1 10 8 3 11 8 5 10 7 9 6 13 5 9 7 2 7 5 12 4 8 8 2 4 1 3 4 7 8 2 5 6 7 4 8 2 3 11 1 11 10 1 4 9 10 8 4 3 6 5 7 6 1 10 2 11 7 11 1 17 2 14 16 13 15 17 3 15 11 1 6 13 2 13 17 4 8 14 10 8 14 14 5 9 12 14 2 12 17 17 6 15 7 14 6 2 14 2 13 2 4 8 4 3 11 7 3 14 1 11 9 13 3 5 10 6 8 3 10 14 ...
output:
1 3 112 1 1 1 1 1 1 1 1 1 1 1 1 1 1 140 1 2 1 814 1 6 1 1 2 2 1 612 1 1 1 1 1 1 1 1 1 121 4536 1 1 1718 1 1 1 1 444 1 1908 1813 3 74 1 1 1 46 1 1 1 1 1 1 1 1 1 1 1 1 1 1 239 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 48 1 2 1 1 2 1 364 1 206 1 1 76 1 1 1 1 2 1 1 2 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 ...
result:
wrong answer 1st lines differ - expected: '0', found: '1'