#include<deque>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<set>
#include<cmath>
#include<tuple>
#include<string>
#include<chrono>
#include<functional>
#include<iterator>
#include<random>
#include<unordered_set>
#include<array>
#include<map>
#include<iomanip>
#include<assert.h>
#include<bitset>
#include<stack>
#include<memory>
using namespace std;
typedef long long int llint;
typedef long double lldo;
#define mp make_pair
#define mt make_tuple
#define pub push_back
#define puf push_front
#define pob pop_back
#define pof pop_front
#define fir first
#define sec second
#define res resize
#define ins insert
#define era erase
/*
cout<<setprecision(20);
cin.tie(0);
ios::sync_with_stdio(false);
*/
const llint mod=1000000000;
const llint big=2.19e15+1;
const long double pai=3.141592653589793238462643383279502884197;
const long double eps=1e-15;
template <class T,class U>bool mineq(T& a,U b){if(a>b){a=b;return true;}return false;}
template <class T,class U>bool maxeq(T& a,U b){if(a<b){a=b;return true;}return false;}
llint gcd(llint a,llint b){if(a%b==0){return b;}else return gcd(b,a%b);}
llint lcm(llint a,llint b){if(a==0){return b;}return a/gcd(a,b)*b;}
template<class T> void SO(T& ve){sort(ve.begin(),ve.end());}
template<class T> void REV(T& ve){reverse(ve.begin(),ve.end());}
template<class T>llint LBI(vector<T>&ar,T in){return lower_bound(ar.begin(),ar.end(),in)-ar.begin();}
template<class T>llint UBI(vector<T>&ar,T in){return upper_bound(ar.begin(),ar.end(),in)-ar.begin();}
//O(mQlogGは通る!)
//void answer(int X){cout<<X<<endl;}
void count_routes(int N,int M,int P,int R[][2],int Q,int G[]){
//まずはどのみちがどの道につながってますか
static int dab[300000][30];
//噴水から歩き始めるものの候補を調べる
int h,i,j;
static int best[150000];
static bool seco[150000]={};
static bool ok[300000]={0};
for(i=0;i<N;i++){best[i]=-1;}
for(i=0;i<M*2;i++){
int a=R[i/2][0];
int b=R[i/2][1];
if(i%2){swap(a,b);}
if(best[a]==-1){best[a]=i;}
else if(!seco[a]){seco[a]=1;dab[best[a]^1][0]=i;}
if(best[b]!=-1&&best[b]!=(i^1)){dab[i][0]=best[b];}
if(b==P){ok[i]=1;}
}
for(i=0;i<N;i++){
if(!seco[i]){dab[best[i]^1][0]=best[i];}
}
for(i=0;i<M*2;i++){
int a=R[i/2][0];
int b=R[i/2][1];
if(i%2){swap(a,b);}
int nex=dab[i][0];
int c=R[nex/2][0];
int d=R[nex/2][1];
if(nex%2){swap(c,d);}
//cout<<"a,b,nexa,nexb"<<a<<b<<c<<d<<endl;
}
for(h=1;h<30;h++){
for(i=0;i<M*2;i++){dab[i][h]=dab[dab[i][h-1]][h-1];}
}
for(j=0;j<Q;j++){
int K=G[j]-1;
int ans=0;
for(i=0;i<N;i++){
int bas=best[i];
for(h=0;h<30;h++){if(K&(1<<h)){bas=dab[bas][h];}}
if(ok[bas]){ans++;}
}
//cerr<<endl;
answer(ans);
}
}
Compilation message
garden.cpp: In function 'void count_routes(int, int, int, int (*)[2], int, int*)':
garden.cpp:99:3: error: 'answer' was not declared in this scope
answer(ans);
^~~~~~
garden.cpp:99:3: note: suggested alternative: 'ans'
answer(ans);
^~~~~~
ans
