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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 |
---|---|---|---|---|---|---|---|---|---|
#704796 | #8938. Crawling on a Tree | chenxinyang2006 | WA | 0ms | 7984kb | C++20 | 2.6kb | 2024-11-02 21:02:38 | 2024-11-02 21:02:39 |
Judging History
answer
#include <bits/stdc++.h>
#define rep(i,j,k) for(int i=(j);i<=(k);i++)
#define per(i,j,k) for(int i=(j);i>=(k);i--)
#define uint unsigned int
#define ll long long
#define ull unsigned long long
#define db double
#define ldb long double
#define pii pair<int,int>
#define pll pair<ll,ll>
#define mkp make_pair
#define eb emplace_back
#define SZ(S) (int)S.size()
//#define mod 998244353
//#define mod 1000000007
#define inf 0x3f3f3f3f
#define linf 0x3f3f3f3f3f3f3f3f
using namespace std;
template <class T>
void chkmax(T &x,T y){
if(x < y) x = y;
}
template <class T>
void chkmin(T &x,T y){
if(x > y) x = y;
}
inline int popcnt(int x){
return __builtin_popcount(x);
}
inline int ctz(int x){
return __builtin_ctz(x);
}
/*ll power(ll p,int k = mod - 2){
ll ans = 1;
while(k){
if(k % 2 == 1) ans = ans * p % mod;
p = p * p % mod;
k /= 2;
}
return ans;
}*/
int n,m;
int a[10005];
int cnt;
int head[10005];
struct eg{
int to,nxt,w,k;
}edge[20005];
void make(int u,int v,int w,int k){
edge[++cnt].to = v;
edge[cnt].w = w;
edge[cnt].k = k;
edge[cnt].nxt = head[u];
head[u] = cnt;
}
ll ssum;
int fa[10005],_l[10005],_r[10005],_val[10005],sum[10005];
void dfs(int u,int f){
fa[u] = f;
for(int i = head[u];i;i = edge[i].nxt){
int v = edge[i].to;
if(v == f) continue;
dfs(v,u);
_val[v] = edge[i].w;
ssum += 2ll * _val[v] * a[v];
_l[v] = 2 * a[v] - edge[i].k;
_r[v] = a[v];
sum[u] += a[v];
}
chkmax(a[u],sum[u]);
}
ll dp[1005][1005],temp[1005];
void dfs2(int u){
fill(dp[u],dp[u] + m + 1,-linf);
dp[u][0] = 0;
for(int i = head[u];i;i = edge[i].nxt){
int v = edge[i].to;
if(v == fa[u]) continue;
dfs2(v);
fill(temp,temp + m + 1,-linf);
rep(j,0,m){
rep(k,0,m - j) chkmax(temp[j + k],dp[u][j] + dp[v][k]);
}
copy(temp,temp + m + 1,dp[u]);
}
/* printf("node %d\n",u);
rep(i,0,m) printf("%lld ",dp[u][i]);
printf("\n");*/
rep(i,1,m) chkmax(dp[u][i],dp[u][i - 1]);
rep(i,0,m){
dp[u][i] += 1ll * i * _val[u];
if(i < _l[u] || i > _r[u]) dp[u][i] = -linf;
}
// rep(i,0,m) printf("%lld ",dp[u][i]);
// printf("\n");
}
int main(){
// freopen("test.in","r",stdin);
scanf("%d%d",&n,&m);
rep(i,1,n - 1){
int u,v,w,k;
scanf("%d%d%d%d",&u,&v,&w,&k);
make(u,v,w,k);make(v,u,w,k);
}
rep(u,2,n) scanf("%d",&a[u]);
dfs(1,0);
_l[1] = 0;_r[1] = m;
// rep(u,1,n) printf("%d ",a[u]);
// printf("\n");
// rep(u,1,n) printf("[%d,%d]\n",_l[u],_r[u]);
dfs2(1);
rep(i,1,m){
chkmax(dp[1][i],dp[1][i - 1]);
if(dp[1][i] == -linf || i < sum[1]) printf("-1\n");
else printf("%lld\n",ssum - dp[1][i]);
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3928kb
input:
4 2 1 2 3 2 2 3 2 1 2 4 5 1 1 1 1
output:
-1 13
result:
ok 2 number(s): "-1 13"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3932kb
input:
4 2 1 2 3 2 2 3 2 1 2 4 5 1 2 2 2
output:
-1 -1
result:
ok 2 number(s): "-1 -1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3836kb
input:
2 1 2 1 1 1 1
output:
1
result:
ok 1 number(s): "1"
Test #4:
score: 0
Accepted
time: 0ms
memory: 7984kb
input:
2 50 2 1 1 1 50
output:
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
result:
ok 50 numbers
Test #5:
score: 0
Accepted
time: 0ms
memory: 3928kb
input:
2 50 2 1 1 50 50
output:
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 50
result:
ok 50 numbers
Test #6:
score: 0
Accepted
time: 0ms
memory: 5884kb
input:
2 50 1 2 1 100000 50
output:
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 50
result:
ok 50 numbers
Test #7:
score: -100
Wrong Answer
time: 0ms
memory: 4020kb
input:
50 1 1 2 85524 58896 2 3 9137 9819 3 4 3036 88987 4 5 78909 15766 5 6 76067 34996 6 7 64247 63701 7 8 14 9384 8 9 37698 35418 9 10 51427 91691 10 11 39818 89351 11 12 47887 64083 12 13 43836 44135 13 14 22561 83803 14 15 52617 97413 15 16 41869 83810 16 17 35783 18642 17 18 5514 34601 18 19 50448 49...
output:
-1
result:
wrong answer 1st numbers differ - expected: '3202064', found: '-1'