# | TimeUTC-0 | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
936974 | sleepntsheep | Synchronization (JOI13_synchronization) | C11 | 205 ms | 15840 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<stdio.h>
#include<stdlib.h>
#define N 100009
int n,m,q,on[N],e[N][2],*eh[N],eo[N],tin[N],tout[N],timer,a[N],c[N],pp[N],jj[N],dd[N],ac[N];
void upd(int*t,int p,int k){ for(;p<N;p|=p+1)t[p]+=k; }
int qry(int*t,int p){++p;int z=0;for(;p;p&=p-1)z+=t[p-1];return z;}
void append(int i,int k){
int o=eo[i]++;
if(o >= 2 && !(o & (o-1))) eh[i] = (int*)realloc(eh[i], o*2*sizeof**eh);
eh[i][o]=k;
}
void dfs(int u,int p){
dd[u]=dd[pp[u]=p]+1;
if(dd[p]-dd[jj[p]]==dd[jj[p]]-dd[jj[jj[p]]])jj[u]=jj[jj[p]];else jj[u]=p;
tin[u]=timer++;
for(int j=0;j<eo[u];++j)if(eh[u][j]-p)dfs(eh[u][j],u);
tout[u]=timer-1;
}
int findroot(int u){
while(u!=1&&qry(ac,tin[u])-qry(ac,tin[pp[u]])==1)
u=(qry(ac,tin[u])-qry(ac,tin[jj[u]])==dd[u]-dd[jj[u]])?jj[u]:pp[u];
return u;
}
int main(){
scanf("%d%d%d",&n,&m,&q);
for(int i=1;i<=n;++i)eh[i]=(int*)malloc(2*sizeof**eh),a[i]=1;
for(int i=1;i<n;++i)scanf("%d%d",e[i],e[i]+1),append(e[i][0],e[i][1]),append(e[i][1],e[i][0]);
pp[1]=jj[1]=1;dfs(1,1);
for(int tt,r,u,v,ii,i=0;i<m;++i){
Compilation message (stderr)
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