# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
44294 | Nnandi | Uzastopni (COCI15_uzastopni) | C++14 | 51 ms | 18176 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 <bits/stdc++.h>
#define bound 55
using namespace std;
struct Mydata {
long long prim, sec;
Mydata() {
prim=0LL;
sec=0LL;
}
bool get_elem(int i) {
if(i<bound) {
return ((prim>>i)%2==1);
}
else {
i-=bound;
return ((sec>>i)%2==1);
}
}
void set_elem(int i, bool b) {
if(i<bound) {
prim=((prim>>(i+1))<<(i+1)) + ((b ? 1LL :0LL)<<i) + ((prim)%(1<<i));
}
else {
i-=bound;
sec=((sec>>(i+1))<<(i+1)) + ((b ? 1LL :0LL)<<i) + ((sec)%(1<<i));
}
return;
}
};
const int maxn=10005;
const int maxv=105;
vector<int> graf[maxn];
Mydata dp[maxn][maxv];
int v[maxn];
void bejar(int start, int apa, set<int> volt) {
int ez=v[start];
if(volt.count(ez)>0) {
return;
}
volt.insert(ez);
dp[start][ez].set_elem(ez+1,true);
vector<int> dag[maxv];
dag[ez].push_back(ez+1);
for(int s:graf[start]) {
bejar(s,start,volt);
for(int i=0;i<maxv;i++) {
for(int j=i+1;j<maxv;j++) {
if(dp[s][i].get_elem(j)) {
dag[i].push_back(j);
}
}
}
}
vector<int> sor;
bool volte[maxv];
for(int i=0;i<=ez;i++) {
sor.resize(0);
memset(volte,false,maxv);
sor.push_back(i);
int it=0;
while(it<(int)(sor.size())) {
int akt=sor[it]; it++;
volte[akt]=true;
for(int s:dag[akt]) {
if(!volte[s]) {
volte[s]=true;
sor.push_back(s);
}
}
}
for(int d:sor) {
if(d>ez) {
dp[start][i].set_elem(d,true);
}
}
}
volt.erase(ez);
return;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
int n;
cin>>n;
for(int i=0;i<n;i++) {
cin>>v[i];
}
for(int i=0;i<n-1;i++) {
int u, v;
cin>>u>>v;
u--; v--;
graf[u].push_back(v);
}
set<int> s;
bejar(0,0,s);
int sol=0;
for(int i=0;i<=v[0];i++) {
for(int j=v[0]+1;j<maxv;j++) {
if(dp[0][i].get_elem(j)) {
sol++;
}
}
}
cout<<sol<<endl;
return 0;
}
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---|---|---|---|---|
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