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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#454768 | #8547. Whose Land? | ucup-team3678# | TL | 8ms | 58880kb | C++17 | 2.4kb | 2024-06-25 13:36:48 | 2024-06-25 13:36:49 |
Judging History
answer
#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
#define P pair<int,int>
#define fi first
#define se second
#define LL long long
#define vec vector<P>
#define fr(x) freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);
using namespace std;
namespace IO
{
const int _Pu=2e7+5,_d=32;
char buf[_Pu],obuf[_Pu],*p1=buf+_Pu,*p2=buf+_Pu,*p3=obuf,*p4=obuf+_Pu-_d;
inline void fin()
{
memmove(buf,p1,p2-p1);
int rlen=fread(buf+(p2-p1),1,p1-buf,stdin);
if(p1-rlen>buf) buf[p2-p1+rlen]=EOF;p1=buf;
}
inline void fout(){fwrite(obuf,p3-obuf,1,stdout),p3=obuf;}
inline int rd()
{
if(p1+_d>p2) fin();int isne=0,x=0;
for(;!isdigit(*p1);++p1) isne=(*p1=='-');x=(*p1++-'0');
for(;isdigit(*p1);++p1) x=x*10+(*p1-'0');
if(isne) x=-x;return x;
}
inline void wr(int x,char end='\n')
{
if(!x) return *p3++='0',*p3++=end,void();
if(x<0) *p3++='-',x=-x;
char sta[20],*top=sta;
do{*top++=(x%10)+'0';x/=10;}while(x);
do{*p3++=*--top;}while(top!=sta);(*p3++)=end;
}
}using IO::rd;using IO::wr;
const int N=1e5+5;
int T,n,k,q,tot,f[N],c[N][25];
basic_string<int>g[N];
vec G[19][N];bool v[N][25],V[N][25];
void dfs(int x,int fa){f[x]=fa;for(int i:g[x]) if(i^fa) dfs(i,x);}
inline void upd(int i,int x,int y){G[0][i].push_back({x,y});}
inline vec hb(vec &A,vec &B)
{
vec Z=A,z;
for(auto i:B) Z.push_back(i);
for(auto &[u,d]:Z) v[u][d]=1;
for(auto &[u,d]:Z)
{
bool o=1;
for(int j=0,x=u;j<=k-d&&x;j++,x=f[x])
if(j&&v[x][d+j]){o=0;break;}
if(o&&!V[u][d]) z.push_back({u,d}),V[u][d]=1;
}
for(auto &[u,d]:Z) v[u][d]=0;
for(auto &[u,d]:z) V[u][d]=0;
return z;
}
int main()
{
T=rd();
while(T--)
{
n=rd(),k=rd(),q=rd();
for(int i=1,u,v;i<n;i++) u=rd(),v=rd(),g[u]+=v,g[v]+=u;dfs(1,0);
for(int i=1;i<=n;i++) for(int j=0,x=i;j<=k&&x;j++,x=f[x]) c[x][j]++;
for(int i=1;i<=n;i++) for(int x=i,y=k;x&&~y;x=f[x],y--)
{
if(f[x]&&y>1) upd(i,x,y),upd(i,x,y-1);
else for(int j=0;j<=y;j++) upd(i,x,j);
}
for(int i=1;i<=__lg(n);i++) for(int j=1;j+(1<<i)-1<=n;j++)
G[i][j]=hb(G[i-1][j],G[i-1][j+(1<<(i-1))]);
while(q--)
{
int l=rd(),r=rd(),t=__lg(r-l+1),ans=0;
vec z=hb(G[t][l],G[t][r-(1<<t)+1]);
for(auto &[u,d]:z) ans+=c[u][d];wr(ans);
}
for(int i=0;i<=__lg(n);i++) for(int j=1;j<=n;j++) G[i][j].clear();
for(int i=0;i<=k;i++) for(int j=1;j<=n;j++) c[j][i]=0;
for(int i=1;i<=n;i++) g[i].clear();
}
return IO::fout(),0;
}
Details
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Test #1:
score: 100
Accepted
time: 8ms
memory: 58880kb
input:
2 5 1 2 1 2 1 3 2 4 2 5 2 2 2 3 8 2 3 1 2 1 3 2 4 2 5 4 6 5 7 7 8 2 2 2 5 3 4
output:
4 5 7 8 6
result:
ok 5 number(s): "4 5 7 8 6"
Test #2:
score: -100
Time Limit Exceeded
input:
1000 500 1 500 291 2 406 9 207 13 71 15 351 17 442 18 496 19 104 20 208 23 448 34 80 42 187 44 352 45 290 46 116 47 318 50 226 52 129 55 83 59 100 60 54 61 73 65 63 66 454 67 43 71 26 74 68 26 320 75 388 76 425 79 170 81 350 83 48 85 153 86 221 90 290 95 130 96 82 98 124 82 36 99 213 100 121 101 132...