ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#196863 | #2663. 旅游 | yyh_yyds | 100 | 954ms | 2516kb | C++11 | 930b | 2023-11-02 10:31:29 | 2023-11-02 12:04:51 |
answer
#include<bits/stdc++.h>
using namespace std;
const int N=610;
int n,v;
int h[N],e[N*2],ne[N*2],idx;
int dp[N][N][2];
void build(int xx,int yy)
{
e[idx]=yy;
ne[idx]=h[xx];
h[xx]=idx++;
}
void dfs1(int u,int fa)
{
dp[u][0][0]=dp[u][0][1]=1;
for(int i=h[u];~i;i=ne[i])
{
int j=e[i];
if(j==fa) continue ;
dfs1(j,u);
for(int p=v;p>=1;p--)
for(int t=0;t<=p;t++)
{
if(p-t>=2){
dp[u][p][0]=max(dp[u][p][0],dp[u][p-t-2][0]+dp[j][t][1]);
dp[u][p][1]=max(dp[u][p][1],dp[u][p-t-2][1]+dp[j][t][1]);
}
dp[u][p][0]=max(dp[u][p][0],dp[u][p-t-1][1]+dp[j][t][0]);
}
}
}
int main()
{
scanf("%d %d",&n,&v);
memset(h,-1,sizeof(h));
for(int i=1;i<n;i++)
{
int xx,yy;
scanf("%d %d",&xx,&yy);
build(xx,yy);
build(yy,xx);
}
dfs1(1,0);
int ans=0;
for(int i=0;i<=v;i++) ans=max(ans,max(dp[1][i][0],dp[1][i][1]));
printf("%d\n",ans);
return 0;
}
Details
小提示:点击横条可展开更详细的信息
Test #1:
score: 5
Accepted
time: 14ms
memory: 2404kb
input:
273 176 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
158
result:
ok single line: '158'
Test #2:
score: 5
Accepted
time: 26ms
memory: 2436kb
input:
280 245 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
194
result:
ok single line: '194'
Test #3:
score: 5
Accepted
time: 36ms
memory: 2460kb
input:
287 307 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
227
result:
ok single line: '227'
Test #4:
score: 5
Accepted
time: 42ms
memory: 2496kb
input:
294 322 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
236
result:
ok single line: '236'
Test #5:
score: 5
Accepted
time: 4ms
memory: 2384kb
input:
271 83 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1...
output:
84
result:
ok single line: '84'
Test #6:
score: 5
Accepted
time: 5ms
memory: 2428kb
input:
278 124 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
125
result:
ok single line: '125'
Test #7:
score: 5
Accepted
time: 51ms
memory: 2452kb
input:
285 350 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
248
result:
ok single line: '248'
Test #8:
score: 5
Accepted
time: 196ms
memory: 2488kb
input:
292 544 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
292
result:
ok single line: '292'
Test #9:
score: 5
Accepted
time: 144ms
memory: 2516kb
input:
299 437 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
295
result:
ok single line: '295'
Test #10:
score: 5
Accepted
time: 112ms
memory: 2416kb
input:
276 531 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
276
result:
ok single line: '276'
Test #11:
score: 5
Accepted
time: 1ms
memory: 2360kb
input:
283 18 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1...
output:
19
result:
ok single line: '19'
Test #12:
score: 5
Accepted
time: 56ms
memory: 2476kb
input:
290 363 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
256
result:
ok single line: '256'
Test #13:
score: 5
Accepted
time: 8ms
memory: 2508kb
input:
297 127 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
128
result:
ok single line: '128'
Test #14:
score: 5
Accepted
time: 0ms
memory: 2356kb
input:
274 49 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1...
output:
50
result:
ok single line: '50'
Test #15:
score: 5
Accepted
time: 61ms
memory: 2436kb
input:
281 397 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
271
result:
ok single line: '271'
Test #16:
score: 5
Accepted
time: 0ms
memory: 2376kb
input:
288 15 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1...
output:
16
result:
ok single line: '16'
Test #17:
score: 5
Accepted
time: 49ms
memory: 2500kb
input:
295 350 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
251
result:
ok single line: '251'
Test #18:
score: 5
Accepted
time: 20ms
memory: 2396kb
input:
272 218 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
179
result:
ok single line: '179'
Test #19:
score: 5
Accepted
time: 118ms
memory: 2428kb
input:
279 541 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
279
result:
ok single line: '279'
Test #20:
score: 5
Accepted
time: 11ms
memory: 2460kb
input:
286 149 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 ...
output:
148
result:
ok single line: '148'