This documentation is automatically generated by online-judge-tools/verification-helper
#define PROBLEM \
"https://onlinejudge.u-aizu.ac.jp/courses/library/5/GRL/3/GRL_3_C"
#include "../template/template.cpp"
#include "../graph/scc.cpp"
void Main() {
int V = in(), E = in();
UnWeightedGraph g(V);
rep(i, E) {
int s = in(), t = in();
g[s].push_back(t);
}
StronglyConnectedComponents<UnWeightedGraph> scc(g);
UnWeightedGraph t;
scc.build(t);
int Q = in();
while (Q--) {
int u = in(), v = in();
out(scc[u] == scc[v]);
}
}
#line 1 "test/scc.test.cpp"
#define PROBLEM \
"https://onlinejudge.u-aizu.ac.jp/courses/library/5/GRL/3/GRL_3_C"
#line 1 "template/template.cpp"
#include <algorithm>
#include <array>
#include <cassert>
#include <cmath>
#include <complex>
#include <cstdint>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
#ifdef _DEBUG
#define DUMP(x) std::cerr << (#x) << " = " << (x) << "\n"
#else
#define DUMP(x)
#endif
#define REP(i, a, b) for (int i = (int)(a); i < (int)(b); ++i)
#define EREP(i, a, b) for (int i = (int)(a); i <= (int)(b); ++i)
#define RREP(i, a, b) for (int i = (int)(a)-1; i >= (int)(b); --i)
#define rep(i, n) REP(i, 0, n)
#define erep(i, n) EREP(i, 0, n)
#define rrep(i, n) RREP(i, n, 0)
#define ALL(r) (r).begin(), (r).end()
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
template <typename T>
ostream &operator<<(ostream &os, const vector<T> &v) {
os << "{";
rep(i, v.size()) os << v[i] << (i == (int)v.size() - 1 ? "" : ", ");
os << "}";
return os;
}
template <typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
return (os << "(" << p.first << ", " << p.second << ")");
}
template <typename T, typename U>
ostream &operator<<(ostream &os, const map<T, U> &m) {
bool first = true;
os << "{";
for (const auto &e : m) {
if (!first)
os << ", ";
os << "{" << e.first << ": " << e.second << "}";
first = false;
}
os << "}";
return os;
}
template <typename T>
ostream &operator<<(ostream &os, const set<T> &s) {
os << "{";
bool first = true;
for (const auto &e : s) {
if (!first)
os << ", ";
os << e;
first = false;
}
os << "}";
return os;
}
template <typename T>
ostream &operator<<(ostream &os, const multiset<T> &s) {
os << "{";
bool first = true;
for (const auto &e : s) {
if (!first)
os << ", ";
os << e;
first = false;
}
os << "}";
return os;
}
template <typename T>
T dup(T x, T y) {
return (x + y - 1) / y;
};
template <typename A, size_t N, typename T>
inline void arrayFill(A (&array)[N], const T &val) {
std::fill((T *)array, (T *)(array + N), val);
}
template <class T>
inline bool chmax(T &a, T b) {
if (a < b) {
a = b;
return true;
}
return false;
}
template <class T>
inline bool chmin(T &a, T b) {
if (a > b) {
a = b;
return true;
}
return false;
}
struct in {
const size_t n = 0;
in() = default;
in(size_t n) : n(n){};
template <typename T>
operator T() {
T ret;
cin >> ret;
return ret;
}
template <typename T>
operator vector<T>() {
assert(n != 0);
vector<T> ret(n);
for (T &x : ret) {
T tmp = in();
x = tmp;
}
return ret;
}
template <typename T, typename U>
operator pair<T, U>() {
pair<T, U> ret;
ret.first = in();
ret.second = in();
return ret;
}
};
namespace fiore {
namespace impl {
template <typename T>
inline void out_impl(const T &x, char end_char) {
std::cout << x << end_char;
}
template <typename T>
inline void out_impl(const vector<T> &x, char end_char) {
bool first = true;
for (const auto &e : x) {
if (!first)
std::cout << ' ';
std::cout << e;
first = false;
}
std::cout << end_char;
}
} // namespace impl
} // namespace fiore
template <typename T>
inline void out(const T &x) {
fiore::impl::out_impl(x, '\n');
};
template <typename T, typename U, typename... Args>
inline void out(const T &x, const U &y, const Args &... args) {
fiore::impl::out_impl(x, ' ');
out(y, args...);
}
using ll = int64_t;
using vint = vector<int32_t>;
using vvint = vector<vint>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vstr = vector<string>;
using pint = pair<int32_t, int32_t>;
using vpint = vector<pint>;
using pll = pair<ll, ll>;
using vpll = vector<pll>;
using setint = set<int32_t>;
using qint = queue<int32_t>;
using qpint = queue<pint>;
constexpr std::int32_t INF = 1001001001;
constexpr std::int64_t LINF = 1001001001001001001;
void Main();
signed main() {
std::cin.tie(nullptr);
std::ios_base::sync_with_stdio(false);
std::cout << std::fixed << std::setprecision(15);
Main();
return 0;
}
#line 1 "graph/scc.cpp"
using UnWeightedGraph = vector<vector<int>>;
template <typename G>
class StronglyConnectedComponents {
const G &g;
UnWeightedGraph gg, rg;
vector<int> comp, order, used;
public:
StronglyConnectedComponents(G &g)
: g(g), gg(g.size()), rg(g.size()), comp(g.size(), -1),
used(g.size(), false) {
rep(i, g.size()) {
for (const auto e : g[i]) {
gg[i].push_back(e);
rg[e].push_back(i);
}
}
}
int operator[](const int k) const { return comp[k]; }
void dfs(const int idx) {
if (used[idx])
return;
used[idx] = true;
for (const auto to : gg[idx])
dfs(to);
order.push_back(idx);
}
void rdfs(const int idx, const int cnt) {
if (comp[idx] != -1)
return;
comp[idx] = cnt;
for (const auto to : rg[idx])
rdfs(to, cnt);
}
void build(UnWeightedGraph &t) {
rep(i, gg.size()) dfs(i);
reverse(ALL(order));
int ptr = 0;
for (const auto i : order) {
if (comp[i] == -1) {
rdfs(i, ptr);
++ptr;
}
}
t.resize(ptr);
rep(i, g.size()) {
for (const auto to : g[i]) {
int x = comp[i], y = comp[to];
if (x == y)
continue;
t[x].push_back(y);
}
}
}
};
#line 5 "test/scc.test.cpp"
void Main() {
int V = in(), E = in();
UnWeightedGraph g(V);
rep(i, E) {
int s = in(), t = in();
g[s].push_back(t);
}
StronglyConnectedComponents<UnWeightedGraph> scc(g);
UnWeightedGraph t;
scc.build(t);
int Q = in();
while (Q--) {
int u = in(), v = in();
out(scc[u] == scc[v]);
}
}