criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <set>
#include <map>
#include <vector>
#include <math.h>
#include <stdlib.h>
#include <queue>
#include <stack>


typedef long double ld;
typedef long long ll;

using namespace std;

#define MAXN 64

vector<int> a[MAXN];
int n, m;
ll ret;
vector<ll> v;
int cnt = 0;
map<pair<int, int>, > edges;

int vis[MAXN];
int pred[MAXN];

void dfs(int cur) {
	vis[cur] = 1;
	for (int i = 0; i < a[cur].size(); i++) {
		int nnext = a[cur][i];
		if (!vis[nnext]) {
			pred[nnext] = cur;
			dfs(nnext);
		}
	}
}

ll path(int s, int t) {
	memset(vis, 0, sizeof(vis));
	memset(pred, -1, sizeof(pred));
	dfs(s);
	ll ret = 0;
	while (t != s) {
		ret |= 1LL << edges[make_pair(t, pred[t])];
		t = pred[t];
	}
	return ret;
}

void addedge(int v1, int v2) {
	pair<int, int> p = make_pair(v1, v2);
	cnt++;
	edges[p] = cnt;
	swap(p.first, p.second);
	edges[p] = cnt;
	
	a[v1].push_back(v2);
	a[v2].push_back(v1);

}

/*
set<int> unite(set<int> s1, set<int> s2) {
	set<int> ret;
	for (set<int>::iterator it = s1.begin(); it != s1.end(); it++) {
		ret.insert(*it);
	}
	for (set<int>::iterator it = s2.begin(); it != s2.end(); it++) {
		ret.insert(*it);
	}
	return ret;
}
*/

ll two(int k) {
	ll ret = 1;
	for (int i = 0; i < k; i++) {
		ret *= 2;
	}
	return ret;
}

int bitcnt(ll x) {
	int ret = 0;
	while (x) {
		if (x & 1) {
			ret++;
		}
		x >>= 1;
	}
	return ret;
}

int main() {
	cin >> n;
	for (int i = 0; i < n - 1; i++) {
		int v1, v2;
		cin >> v1 >> v2;
		v1--;
		v2--;
		addedge(v1, v2);
		addedge(v2, v1);
	}
	ret = two(n - 1);
	cin >> m;
	for (int i = 0; i < m; i++) {
		int v1, v2;
		cin >> v1 >> v2;
		v1--;
		v2--;
		v.push_back(path(v1, v2));		
	}
	ll corr = 0;
	for (int mask = 1; mask < (1 << m); mask++) {
		ll cur = 0;
		int parity = 0;
		for (int j = 0; j < m; j++) {
			if (mask & (1 << j)) {
				cur |= v[j];
				parity = 1 - parity;
			}
		}
		ll curval = two(n - 1 - bitcnt(cur));
		if (parity) {
			corr += curval;	
		} else {
			corr -= curval;
		}
	}	
	ret -= corr;
	cout << ret << endl;

	return 0;
}


Compiler output:
a.cc:28:21: error: template argument 2 is invalid
   28 | map<pair<int, int>, > edges;
      |                     ^
a.cc:28:21: error: template argument 4 is invalid
a.cc: In function 'll path(int, int)':
a.cc:50:36: error: no match for 'operator[]' (operand types are 'int' and 'std::pair<int, int>')
   50 |                 ret |= 1LL << edges[make_pair(t, pred[t])];
      |                                    ^
a.cc: In function 'void addedge(int, int)':
a.cc:59:14: error: no match for 'operator[]' (operand types are 'int' and 'std::pair<int, int>')
   59 |         edges[p] = cnt;
      |              ^
a.cc:61:14: error: no match for 'operator[]' (operand types are 'int' and 'std::pair<int, int>')
   61 |         edges[p] = cnt;
      |              ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define int long long 
typedef long long ll;
typedef pair<int,int>pi;
const int MAXN=100005;
const int MOD=1000000007;

#define FOR(i,a,b) for(int i=(a);i<=(b);i++)
#define DEC(i,a,b) for(int i=(a);i>=(b);i--)
#define fst first
#define snd second
#define pb push_back
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(),(v).end()
#define db(x) cerr<<#x<<" = "<<x<<"\n"
#define LOW(v,x) (lower_bound(all(v),(x))-(v).begin())
#define UP(v,x) (upper_bound(all(v),(x))-(v).begin())

#define isOn(S, j) (S & (1<<j))
#define setBit(S, j) (S |= (1<<j))
#define clearBit(S, j) (S &= ~(1<<j))

map<pi, int> edgeid;
vector<int> adjList[55];
int N,M,par[55],d[55],x[55];
vector<int> cons[55];

int cnt;
void dfs(int u, int p){
	par[u]=p;
	d[u]=d[p]+1;
	for (auto v:adjList[u]){
		if (v==p)continue;
		dfs(v,u);
	}
}

vector<int> findpath(int x, int y){
	vector<int> res;
	while (x!=y){
		if (d[x]>d[y]){
			res.pb(edgeid[{x,par[x]}]);
			x=par[x];
		}
		else{
			res.pb(edgeid[{y,par[y]}]);
			y=par[y];
		}
	}
	return res;
}

main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin>>N;
	FOR(i,1,N-1){
		int a,b;cin>>a>>b;
		if(a>b) swap(a,b);
		adjList[a].pb(b);
		adjList[b].pb(a);
		edgeid[{a,b}]=i;
		edgeid[{b,a}]=i;
	}
	dfs(1,0);
	cin>>M;
	FOR(i,0,M-1){
		int a,b;cin>>a>>b;
		cons[i]=findpath(a,b);
	}
	int res = (1<<(N-1));
	int fails = 0;
	FOR(bm,0,(1<<M)-1){
		memset(x,0,sizeof x);
		int cnt=0, C=0;
		FOR(i,0,M-1){
			if (isOn(bm, i)){
				cnt++;
				for (auto j:cons[i]) x[j]=1;
			}
		}
		FOR(i,1,N-1) C+=x[i];
		if(cnt==0) continue;
		if (cnt%2) fails += 1<<(N-1-C);
		else fails -= 1<<(N-1-C);
	}
  	assert(res-fails>0)
	cout<<res-fails;
}


Compiler output:
a.cc:54:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   54 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:89:9: error: expected ';' before 'cout'
   89 |         cout<<res-fails;
      |         ^~~~
Language: C++

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <queue>
#include <stack>
#include <cstdlib>
#include <map>
#include <iomanip>
#include <set>
#include <stdio.h>
#include <ctype.h>
#include <random>
#include <string.h>
#include <Bits.h>
using namespace std;
#define pie 3.141592653589793238462643383279
#define mod 1000000007
#define all(vec) vec.begin(),vec.end()

int gcd(int x, int y) {
	if (y == 0)return x;
	return gcd(y, x%y);
}
int lcm(int x, int y) {
	return x / gcd(x, y)*y;
}
int kai(int x, int y) {
	int res = 1;
	for (int i = x - y + 1; i <= x; i++) {
		res *= i; res %= mod;
	}
	return res;
}
int mod_pow(int x, int y, int m) {
	int res = 1;
	while (y > 0) {
		if (y & 1) {
			res = res * x % m;
		}
		x = x * x % m;
		y >>= 1;
	}
	return res;
}

int comb(int x, int y) {
	if (y > x)return 0;
	return kai(x, y) * mod_pow(kai(y, y), mod - 2, mod) % mod;
}

int n, m;
vector<pair<int, int>> vec[55];
int d[55];
int p[55];
int g[55];
long long cnt[25];
long long ans;

void dfs(int v, int pp,int k) {
	for (int i = 0; i < (int)vec[v].size(); i++) {
		if (vec[v][i].first == pp)continue;
		p[vec[v][i].first] = vec[v][i].second;
		d[vec[v][i].first] = k + 1;
		g[vec[v][i].first] = v;
		dfs(vec[v][i].first, v, k + 1);
	}
}

signed main() {
	cin >> n;
	for (int i = 0; i < n - 1; i++) {
		int a, b; cin >> a >> b;
		vec[a].push_back(make_pair(b, i));
		vec[b].push_back(make_pair(a, i));
	}
	dfs(1, 0, 0);
	cin >> m;
	for (int i = 0; i < m; i++) {
		int a, b; cin >> a >> b;
		while (d[a] < d[b]) {
			cnt[i] += 1 << p[b];
			b = g[b];
		}
		while (d[a] > d[b]) {
			cnt[i] += 1 << p[a];
			a = g[a];
		}
		while (a != b) {
			cnt[i] += 1 << p[b];
			cnt[i] += 1 << p[a];
			b = g[b];
			a = g[a];
		}
	}
	for (int i = 0; i < (1 << m); i++) {
		long long cnt2 = 0, cnt3 = 0;
		for (int j = 0; j < m; j++)if (i&(1 << j)) {
			cnt2 |= cnt[j];
			cnt3++;
		}
		long long cnt4 = 0;
		for (int j = 0; j < n - 1; j++)if (cnt2&(1 << j))cnt4++;
		if (cnt3 % 2)ans -= (1 << (n - 1 - cnt4));
		else ans += (1 << (n - 1 - cnt4));
	}
	cout << ans << endl;
}

Compiler output:
a.cc:17:10: fatal error: Bits.h: No such file or directory
   17 | #include <Bits.h>
      |          ^~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int,int>;

struct Edge {
  int to, id;
  Edge(int to, int id): to(to), id(id) {}
};

vector<Edge> g[55];

vector<int> es;
bool dfs(int v, int tv, int p) {
  if (v == tv) return true;
  for (Edge e : g[v]) {
    if (e.to == p) continue;
    if (dfs(e.to, tv, v)) {
      es.push_back(e.id);
      return true;
    }
  }
  return false;
}

int main() {
  int n, m;
  cin >> n;
  rep(i,n-1) {
    int a, b;
    cin >> a >> b;
    --a; --b;
    g[a].emplace_back(b, i);
    g[b].emplace_back(a, i);
  }

  cin >> m;
  vector<ll> eset(m);
  rep(i,m) {
    int a, b;
    cin >> a >> b;
    --a; --b;
    es = vector<int>();
    dfs(a,b);
    for (int e : es) {
      eset[i] |= 1ll<<e;
    }
  }

  ll ans = 0;
  rep(i,1<<m) {
    ll mask = 0;
    rep(j,m) {
      if (i>>j&1) mask |= eset[j];
    }
    int white = __builtin_popcountll(mask);
    ll now = 1ll<<(n-1-white); // 2^(n-1-white)
    if (__builtin_popcountll(i)%2 == 0) ans += now;
    else ans -= now;
  }
  cout << ans << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:45:8: error: too few arguments to function 'bool dfs(int, int, int)'
   45 |     dfs(a,b);
      |     ~~~^~~~~
a.cc:15:6: note: declared here
   15 | bool dfs(int v, int tv, int p) {
      |      ^~~
Language: C++

#include<cstdio>
#include<algorithm>
#include<vector>
#define ll long long
using namespace std;
ll n, m;
ll xx[61];
ll dap;
ll gap;
pair<ll, ll> b[61];
pair<ll, ll> a[61];
ll parse[61][8];

vector < vector<pair<ll,ll>>> vt;
ll de[61];
ll dfs(ll here,ll par, ll en,ll ch2) {
	if (here == en)return 1;
	for (ll i = 0; i < vt[here].size(); i++) {
		ll next = vt[here][i].first;
		if (next == par)continue;
		if (dfs(next, here, en,ch2)) {
			xx[vt[here][i].second] |= (1<<ch2);
			return 1;
		}
	}
	return 0;
}
void func(ll here, ll ch,ll update) {
	if (here == m) {
		ll sum = 0;
		ll oo = 0;
		for (ll i = 0; i < n-1; i++) {
			if (ch & xx[i])oo++;
		}
		if (oo) {
			oo = (n - 1 - oo);
			sum = (1 << oo);
		}
		if (update % 2)gap += sum;
		else gap -= sum;
		return;
	}
	func(here+1 , ch + (1 << here), update+1);
	func(here+1, ch, update);
}
int main()
{
	scanf("%lld", &n);
	vt.resize(n + 1);
	for (ll i = 0; i < n - 1; i++) {
		ll q, w;
		scanf("%lld %lld", &q, &w);
		b[i] = { q,w };
		vt[q].push_back({ w ,i});
		vt[w].push_back({ q ,i});
	}
	scanf("%lld", &m);
	dap = (1 << (n - 1));
	for (ll i = 0; i < m; i++) {
		scanf("%lld %lld", &a[i].first, &a[i].second);
		dfs(a[i].first, -1, a[i].second, i);
	}
	func(0, 0, 0);
	dap -= gap;
	prllf("%lld", dap);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:65:9: error: 'prllf' was not declared in this scope
   65 |         prllf("%lld", dap);
      |         ^~~~~
Language: C++

#!usr/bin/env python3
from collections import defaultdict, deque
from heapq import heappush, heappop
from itertools import permutations, accumulate
import sys
import math
import bisect
def LI(): return [int(x) for x in sys.stdin.buffer.readline().split()]
def I(): return int(sys.stdin.buffer.readline())
def LS():return [list(x) for x in sys.stdin.readline().split()]
def S():
    res = list(sys.stdin.readline())
    if res[-1] == "\n":
        return res[:-1]
    return res
def IR(n):
    return [I() for i in range(n)]
def LIR(n):
    return [LI() for i in range(n)]
def SR(n):
    return [S() for i in range(n)]
def LSR(n):
    return [LS() for i in range(n)]

sys.setrecursionlimit(1000000)
mod = 1000000007

def solve():
    n = I()
    ns = set()
    v = [[] for i in range(n)]
    for _ in range(n-1):
        a,b = LI()
        a -= 1
        b -= 1
        v[a].append(b)
        v[b].append(a)
        ns.add((min(a,b),max(a,b)))
    d = [None]*n
    d[0] = set()
    q = [0]
    while q:
        x = q.pop()
        for y in v[x]:
            if d[y] is None:
                d[y] = d[x]|{(min(x,y),max(x,y))}
                q.append(y)
    m = I()
    f = []
    for _ in range(m):
        a,b = LI()
        a -= 1
        b -= 1
        f.append((a,b))
    ans = 0
    for b in range(1,1<<m):
        c = -1
        s = set()
        for i in range(m):
            if b&(1<<i):
                c *= -1
                x,y = f[i]
                s |= d[x]^d[y]
        ans += c*((1<<len(s))-1)*(1<<(n-1-len(s)))
    print(ans)
    return

#Solve
if __name__ == "__main__":
    solve()


Compiler output:
a.cc:1:2: error: invalid preprocessing directive #!
    1 | #!usr/bin/env python3
      |  ^
a.cc:68:2: error: invalid preprocessing directive #Solve
   68 | #Solve
      |  ^~~~~
a.cc:2:1: error: 'from' does not name a type
    2 | from collections import defaultdict, deque
      | ^~~~
a.cc:47:17: error: 'q' does not name a type
   47 |                 q.append(y)
      |                 ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

#include "../Algo/NumberTheory/modulo.h"

using BS = bitset<51>;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    int n;
    cin >> n;
    map<pair<int, int>, int> mp;
    vector<vector<int>> g(n);
    for (int i = 0; i < n-1; i++) {
        int u, v;
        cin >> u >> v;
        v--; u--;
        mp[{u, v}] = i;
        mp[{v, u}] = i;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    int m;
    cin >> m;
    vector<BS> bs(m);
    for (int i = 0; i < m; i++) {
        int u0, v0;
        cin >> u0 >> v0;
        u0--; v0--;
        vector<int> path;
        function<void(int, int)> dfs;
        dfs = [&] (int v, int p) {
            if (v == u0) {
                for (int j: path) {
                    bs[i][j] = 1;
                }
            }
            for (int u: g[v]) {
                if (u != p) {
                    path.push_back(mp[{u, v}]);
                    dfs(u, v);
                    path.pop_back();
                }
            }
        };
        dfs(v0, -1);
    }
    long long ans = 1ll << (n-1);
    for (int mask = 1; mask < (1<<m); mask++) {
        BS cur;
        int tot = 0;
        for (int i = 0; i < m; i++) {
            if (((1<<i) & mask) > 0) {
                tot++;
                cur |= bs[i];
            }
        }
        int sz = cur.count();
        ans += (tot%2 == 1 ? -1 : 1)*(1ll<<(n-1-sz));
    }
    cout << ans << endl;
}



Compiler output:
a.cc:5:10: fatal error: ../Algo/NumberTheory/modulo.h: No such file or directory
    5 | #include "../Algo/NumberTheory/modulo.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
#define int long long
using namespace std;
int n, m;
vector<vector<int>> v;
long long vb[53][53], cb[53];

long long dfs(int parent, int cur, int dest) {
	long long ret = 0;
	for(int c: v[cur]) {
		if (parent == c) continue;
		if (c == dest) return vb[cur][c];
		ret = dfs(cur, c, dest);
		if (ret) {
			ret |= vb[cur][c];
			break;
		}
	}
	return ret;
}

std::vector<std::vector<int>> iig(int vn, int en) {
	std::vector<std::vector<int>> res(vn);
        for(int i = 0; i < en; i++) {
                int s, t;
                std::cin >> s >> t;
                s--; t--;
                res[s].push_back(t);
                res[t].push_back(s);
		vb[s][t] = vb[t][s] = 1LL << i;
        }
        return res;
}

int main() {
	cin >> n;
	v = iig(n, n - 1);
	cin >> m;
	for(int i = 0; i < m; i++) {
		int ui, vi;
		cin >> ui >> vi;
		ui--; vi--;
		cb[i] = dfs(-1, ui, vi);
	}
	int f = 1;
	long long res = 0;
	for(int i = 1; i <= m; i++) {
		vector<bool> bitmask(m - i, false);
		bitmask.resize(m, true);
		do {
			long long bits = 0;
			for(int i = 0; i < m; i++) {
				if (bitmask[i]) bits |= cb[i];
			}
			int count_ones = __builtin_popcountll(bits);
			int count_zeros = n - 1 - count_ones;
			if (f) {
				res += 1 << count_zeros;
			} else {
				res -= 1 << count_zeros;
			}
		} while(next_permutation(bitmask.begin(), bitmask.end()));
		f ^= 1;
	}
	cout << (1LL << (n - 1)) - res << endl;
}








Compiler output:
cc1plus: error: '::main' must return 'int'
Language: C++

/* ---------- STL Libraries ---------- */
// IO library
#include <cstdio>

#include <fstream>
#include <iomanip>
#include <ios>
#include <iostream>

// algorithm library
#include <algorithm>

#include <cmath>
#include <numeric>
#include <random>
#include <cstring>

// container library
#include <array>
#include <bitset>
#include <deque>
#include <map>
#include <unordered_map>
#include <queue>
#include <set>
#include <string>
#include <tuple>
#include <vector>
#include <stack>

// type
#include <cstdint>

/* ---------- Namespace ---------- */
using namespace std;

/* ---------- Type ---------- */
using ll = long long;
#define int ll
#define P pair<ll, ll>

/* ---------- Constants  */
const double PI = 3.141592653589793238462643383279;
const ll MOD = 1e9 + 7;
const int INF = 1LL << 55;

/* v-v-v-v-v-v-v-v-v Main Part v-v-v-v-v-v-v-v-v */
struct edge {
    int to;
    int idx;
};

signed main() {
    int N;
    cin >> N;
    vector<vector<edge>> table(N);

    for (int i = 0; i < N-1; i++) {
        int a, b;
        cin >> a >> b;
        a--; b--;
        table[a].push_back({b, i});
        table[b].push_back({a, i});
    }

    auto dfs = [&](auto f, int node, int par, int goal, vector<int> &edge_idxs) -> bool {
        if (node == goal) return true;

        bool flag = false;
        for (auto &edge : table[node]) {
            int next = edge.to;
            if (next == par) continue;
            flag |= f(f, next, node, goal, edge_idxs);
            if (flag) {
                edge_idxs.push_back(edge.idx);
                break;
            }
        }

        return flag;
    };

    vector<int> effects(N-1, 0);
    int M;
    cin >> M;
    for (int i = 0; i < M; i++) {
        int u, v;
        cin >> u >> v;
        u--; v--;
        vector<int> edges;
        assert(dfs(dfs, u, -1, v, edges));
        for (int idx : edges) {
            effects[idx] |= (1 << i);
        }
    }

    vector<vector<int>> dp(N, vector<int>(1 << M, 0));
    dp[0][0] = 1;

    for (int i = 0; i < N - 1; i++) {
        for (int mask = 0; mask < (1 << M); mask++) {
            dp[i+1][mask] += dp[i][mask];
            dp[i+1][mask | effects[i]] += dp[i][mask];
        }
    }

    cout << dp[N-1][(1 << M)-1] << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:91:9: error: 'assert' was not declared in this scope
   91 |         assert(dfs(dfs, u, -1, v, edges));
      |         ^~~~~~
a.cc:30:1: note: 'assert' is defined in header '<cassert>'; this is probably fixable by adding '#include <cassert>'
   29 | #include <stack>
  +++ |+#include <cassert>
   30 |
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define rep(i, n) FOR(i, 0, n)
#define whole(x) (x).begin(),(x).end()
#define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end())
using ll = long long;
using P = pair<int, int>;
const int mod = 1000000007;
#define int long long


struct Edge{
    ll to;
    ll id;
    Edge(ll a, ll b):to(a), id(b){};
};

vector<Edge> g[55];
vector<ll> es;

bool dfs(ll v, ll tv, int p = -1)
{
    if (p==1) es = vector<ll> ();
    if (v==tv) {
        return true;
    }
    for (auto e: g[v]) {
        if (e.to==p) continue;
        if (dfs(e.to, tv, v)) {
            es.emplace_back(e.id);
            return true;
        }
    }
    return false;
}

int main(){
    ll n, m;
    cin >> n;
    rep (i, n-1) {
        int a, b;
        cin >> a >> b;
        a--;
        b--;
        g[a].emplace_back(b, i);
        g[b].emplace_back(a, i);
    }
    cin >> m;
    vector<ll> eset(m);
    rep (i, m) {
        int a, b;
        cin >> a >> b;
        a--;
        b--;
        dfs(a, b);
        for (auto e: es) {
            eset[i] |= (1LL << e);
        }
    }
    ll ans = 0;
    rep (i, 1LL<<m) {
        ll mask = 0;
        rep (j, m) {
            if (i>>j & 1) {
                mask |= eset[j];
            }
        }
        ll white = __builtin_popcountll(mask);
        ll now = 1LL << (n-1-white);
        if (__builtin_popcountll(i)%2==0) ans += now;
        else ans -= now;
    }
    
    cout << ans << endl;
    return 0;
}


Compiler output:
cc1plus: error: '::main' must return 'int'
Language: C++

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define int long long
#define inf 1000000007
#define LINF 1000000000000000007LL
#define ll long long
using namespace std;
int ct[1145140];
int dist[55][55];
int p2[61];
vector<int> nex[55];
vector<int> pth[55][55];
bool col[1145140][55];
void nuri( int bi, int s, int t ){
	for(int i=0;i<pth[s][t].size();i++){
		col[bi][ pth[s][t][i] ] = true;
	}
}
signed main(){
	int n;
	cin>>n;
	vector<int> aa(n),bb(n);
	for(int i=0;i<n-1;i++){
		cin>>aa[i]>>bb[i];
		nex[aa[i]].pb(bb[i]);
		nex[bb[i]].pb(aa[i]);
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			if( i!=j ) dist[i][j] = LINF;
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=0;j<nex[i].size();j++){
			dist[i][nex[i][j]] = 1;
		}
	}
	for(int k=1;k<=n;k++){
		for(int i=1;i<=n;i++){
			for(int j=1;j<=n;j++){
				dist[i][j] = min( dist[i][j], dist[i][k] + dist[k][j] );
			}
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			for(int k=0;k<n-1;k++){
				if( dist[i][j] == dist[i][aa[k]] + dist[aa[k]][j] ){
					if( dist[i][j] == dist[i][bb[k]] + dist[bb[k]][j]){
						pth[i][j].pb(k);
					}
				}
			}
		}
	}
	int m;
	cin>>m;
	p2[0] = 1;
	for(int i=1;i<=60;i++){
		p2[i] = p2[i-1] * 2;
	}
	vector<int> u(m),v(m);
	for(int i=0;i<m;i++){
		cin>>u[i]>>v[i];
	}
	ct[0] = p[n-1];
	for(int bi = 1; bi < (1<<m); bi ++ ){
		int mb = -1;
		int prv = bi;
		for(int i=0;i<m;i++){
			if( ( bi >> i ) % 2 == 1 ){
				mb = i;
				prv -= (1<<mb);
				break;
			}
		}
		for(int i=0;i<n-1;i++){
			col[bi][i] = col[prv][i];
		}
		nuri( bi, u[mb], v[mb] );
		int arb = 0;
		for(int i=0;i<n-1;i++){
			if( !col[bi][i] ) arb ++;
		}
		ct[bi] = p2[arb];
	}
	//for(int i=0;i<(1<<m);i++){cout<<ct[i]<<endl;}
	int ans = 0;
	for(int i=0;i<(1<<m);i++){
		int bc = 0;
		for(int j=0;j<m;j++){
			if( (i>>j) % 2 ) bc ++;
		}
		if( bc%2 == 0 ){
			ans += ct[i];
		}
		else{
			ans -= ct[i];
		}
	}
	cout<<ans<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:67:17: error: 'p' was not declared in this scope
   67 |         ct[0] = p[n-1];
      |                 ^
Language: C++

#include<iostream>
#include<vector>
#define dst first
#define id second
using namespace std;
typedef pair<int, int> Edge;
const int NODE = 51;
const int START_GOAL = 20;
const int BUF = 1 << START_GOAL;


int nNode;
vector<Edge> adj[NODE];
int nSG, startGoal[START_GOAL][2];

void read() {
    for (int i = 0; i < NODE; ++i) adj[i].clear();

    cin >> nNode;
    for (int i = 0; i < nNode - 1; ++i) {
        int s, t;
        cin >> s >> t;
        --s, --t;
        adj[s].push_back(Edge(t, i));
        adj[t].push_back(Edge(s, i));
    }
    cin >> nSG;
    for (int i = 0; i < nSG; ++i) {
        int s, g;
        cin >> s >> g;
        --s, --g;
        startGoal[i][0] = s;
        startGoal[i][1] = g;
    }
}

bool dfs(int pre, int cur, int goal, int edge2mask[NODE], int id) {
    if (cur == goal) return true;
    for (int i = 0; i < adj[cur].size(); ++i) {
        Edge &e = adj[cur][i];
        if (e.dst == pre) continue;
        if (dfs(cur, e.dst, goal, edge2mask, id)) {
            edge2mask[e.id] |= 1LL << id;
            return true;
        }
    }
    return false;
}


long long rec(int cur, int mask, long long dp[NODE][BUF], int edge2mask[NODE]) {
    long long &ret = dp[cur][mask];
    if (ret != -1) return ret;
    
    ret = 0;
    
    if (mask == (1 << nSG) - 1) {
        ret = (1 << (nNode - 1 - cur));
        return ret;
    }

    if (cur == nNode - 1) {
        return ret;
    }
    
    // color edge
    ret += rec(cur + 1, mask | edge2mask[cur], dp, edge2mask);
    
    // do not color edge
    ret += rec(cur + 1, mask, dp, edge2mask);

    return ret;
}


void work() {
    int edge2mask[NODE] = {};
    for (int i = 0; i < nSG; ++i) {
        dfs(-1, startGoal[i][0], startGoal[i][1], edge2mask, i);
    }

    static long long dp[NODE][BUF];
    memset(dp, -1, sizeof(dp));
    cout << rec(0, 0, dp, edge2mask) << endl;
}


int main() {
    read();
    work();
    return 0;
}


Compiler output:
a.cc: In function 'void work()':
a.cc:83:5: error: 'memset' was not declared in this scope
   83 |     memset(dp, -1, sizeof(dp));
      |     ^~~~~~
a.cc:3:1: note: 'memset' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include<vector>
  +++ |+#include <cstring>
    3 | #define dst first
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<int(n);++i)
#define bit(k) (1LL<<(k))

vector<vector<int>> g;

map<pair<int,int>, int> path_id;
bool get_path(int cur, int pre, int goal, vector<int> &path){
    if (cur == goal) return true;
    for(int to : g[cur]){
        if(to == pre) continue;
        int id = min(cur, to) * 100 + max(cur, to);

        path.push_back(id);
        if (get_path(to, cur, goal, path)) {
            return true;
        } else {
            path.pop_back();
        }
    }
    return false;
}

int main(void){
    int n;
    cin >> n;
    g.resize(n);
    rep(i,n-1){
        int a,b;
        cin >> a >> b;
        a--, b--;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    int m;
    cin >> m;
    vector<vector<int>> paths(m);
    rep(i,m){
        int u, v;
        cin >> u >> v;
        u--, v--;
        get_path(u, -1, v, paths[i]);
    }
    long long res = 0;
    rep(mask, 1<<m){

        // set<int> st;
        vector<int> st;
        rep(i,m){
            if (bit(i) & mask) {
                for(int e : paths[i]) {
                    // st.insert(e);
                    st.push_back(e);
                }
            }
        }
        sort(all(st));
        st.erase(unique(all(st), vec.end()));

        res += (((int)__builtin_popcount(mask) & 1) ? -1 : +1) * (1LL<<((n-1) - (int)st.size()));
    }
    cout << res << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:58:14: error: 'all' was not declared in this scope; did you mean 'std::filesystem::perms::all'?
   58 |         sort(all(st));
      |              ^~~
      |              std::filesystem::perms::all
In file included from /usr/include/c++/14/filesystem:51,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:200,
                 from a.cc:1:
/usr/include/c++/14/bits/fs_fwd.h:158:7: note: 'std::filesystem::perms::all' declared here
  158 |       all               =  0777,
      |       ^~~
a.cc:59:34: error: 'vec' was not declared in this scope
   59 |         st.erase(unique(all(st), vec.end()));
      |                                  ^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 51;
const int BIT = (1<<20);
int n, m, d[N];
vector<int> g[N];
ll bit[BIT];
void dfs_pre(int fa, int u, int src, int dest, int idx) {
    v.push_back(u);
    if(u == dest) {
        for(int i = 1; i < v.size(); i++) {
            int t = v[i];
            if(d[v[i]] < d[v[i-1]]) t = v[i-1];
            bit[1<<idx] |= (1LL<<t);
        }
    }
    for(int v : g[u]) {
        if(v == fa) continue;
        if(dest==-1) d[v] = d[u]+1;
        dfs_pre(u, v, src, dest, idx);
    }
    v.pop_back();
}
int get_count(ll x) {
    int t = 0;
    while(x) {
        if(x&1) t++;
        x /= 2;
    }
    return t;
}
int main() {
    cin >> n;
    for(int i = 1, u, v; i < n; i++) {
        cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    cin >> m;
    dfs_pre(-1, 1, 1, -1, 0);
    for(int i = 0, u, v; i < m; i++) {
        cin >> u >> v;
        dfs_pre(-1, u, u, v, i);
    }
    ll ans = (1LL<<(n-1));
    for(int i = 1; i < (1<<m); i++) {
        bit[i] = bit[i&-i] | bit[i-(i&-i)];
        int c = get_count(bit[i]);
        ll res = (1LL<<(n-1-c)) * ((get_count(i) & 1) ? 1 : -1);
        ans -= res;
    }
    cout << ans << '\n';
    return 0;
}

Compiler output:
a.cc: In function 'void dfs_pre(int, int, int, int, int)':
a.cc:10:5: error: 'v' was not declared in this scope
   10 |     v.push_back(u);
      |     ^
Language: C++

#include <iostream>
#include <vector>
#include <cmath>
//#include <algorithm>
#include <set>
#include <boost/dynamic_bitset.hpp>
using namespace std;
using uint = unsigned int;
using ll = long long;

int bfs(const vector<vector<int>>& G, boost::dynamic_bitset<>& eb, const uint u, const uint v, const uint p) {
	//cout << "bfs " << u << " " << v << " " << p << endl; 
	if(u == v) return 0;
	
	for(uint nu=0; nu<G[u].size(); nu++) {
		if(nu == p) continue;
		if(G[u][nu] == -1) continue;
		
		int nd = bfs(G, eb, nu, v, u);
		//cout << "nd " << u << " " << v << " " << nd << endl; 
		if(nd != -1) {
			eb.set(G[u][nu]);
			return nd + 1;
		}
	}
	
	return -1;
}

int main() {
	uint N;
	cin >> N;
	
	vector<vector<int>> G(N, vector<int>(N, -1));
	
	for(uint i=0; i<N-1; i++) {
		uint a, b;
		cin >> a >> b;
		
		G[a-1][b-1] = (int)i;
		G[b-1][a-1] = (int)i;
	}
	
	uint M;
	cin >> M;
	
	vector<boost::dynamic_bitset<>> ebits(M, boost::dynamic_bitset<>(M + N - 1));
	vector<set<boost::dynamic_bitset<>>> ps(2, set<boost::dynamic_bitset<>>());
	
	for(uint i=0; i<M; i++) {
		uint u, v;
		cin >> u >> v;
		
		int dist = bfs(G, ebits[i], u-1, v-1, u-1);
		ebits[i].set(i + N - 1);
		//cout << dist << " " << ebits[i] << endl;
	}
	
	ps[0].insert(boost::dynamic_bitset<>(M + N - 1, 0));
	ull ans = 0;
	
	for(uint i=0; i<=M; i++) {
		uint cur = i % 2;
		uint nxt = (i + 1) % 2;
		
		for(auto p : ps[cur]) {
			
			int bcnt = p.count() - i;
			int dif = pow(2, N - 1 - bcnt);
			
			ans = (i % 2) ? ans - dif : ans + dif;
			
			for(uint j=0; j<M; j++) {
				auto np = p | ebits[j];
				if(p != np) {
					//cout << "np " << np << endl;
					ps[nxt].insert(np);
				}
			}
		}
		
		ps[cur].clear();
	}
	
	cout << ans;
	
	return 0;
}


Compiler output:
a.cc:6:10: fatal error: boost/dynamic_bitset.hpp: No such file or directory
    6 | #include <boost/dynamic_bitset.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;

using i64 = long long;

vector<bitset<50>> use_edge;
vector<vector<pair<int, int>>> edge;

bool dfs(int v, int i, int n, int p = -1) {
  if(n == v) return true;
  
  for(auto &e : edge[n]) {
    if(e.first == p) continue;
    
    bool res = dfs(v, i, e.first, n);
    
    if(res) {
      use_edge[i].set(e.second);
      return true;
    }
  }
  return false;
}

int main() {
  int n;
  cin >> n;
  edge = vector<vector<pair<int, int>>>(n);
  for(int i = 0; i < n - 1; ++i) {
    int a, b;
    cin >> a >> b;
    edge[a - 1].push_back({ b - 1, i });
    edge[b - 1].push_back({ a - 1, i });
  }
  int m;
  cin >> m;
  use_edge = vector<bitset<50>>(m, bitset<50>(0));
  for(int i = 0; i < m; ++i) {
    int u, v;
    cin >> u >> v;
    dfs(v - 1, i, u - 1);
  }

  i64 cnt = 0;
  for(int bit = 1; bit < (1 << m); ++bit) {
    int popcnt = 0;
    bitset<50> b(0);
    
    for(int i = 0; i < m; ++i) {
      if(bit & (1 << i)) {
        b |= use_edge[i]o;
        popcnt++;
      }
    }
    
    int e = (n - 1) - b.count();
    
    if(popcnt & 1 == 1) cnt += (1ll << e);
    else cnt -= (1ll << e);
  }

  i64 ans = (1ll << (n - 1)) - cnt;
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:51:25: error: expected ';' before 'o'
   51 |         b |= use_edge[i]o;
      |                         ^
      |                         ;
Language: C++

#include <bits/stdc++.h>
//#include <boost/multiprecision/cpp_int.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize("O3")
#define REP(i,n) for(int i=0;i<n;i++)
#define REPP(i,n) for(int i=1;i<=n;i++)
#define ALL(obj) (obj).begin(), (obj).end()
#define EPS (1e-9)
#define INF (1e17)
#define PI (acos(-1))
//const double PI = acos(-1);
//const double EPS = 1e-15;
//long long INF=(long long)1E17;
#define i_7 (long long)(1e9+7)
//#define i_7 998'244'353
long mod(long a){
    long long c=a%i_7;
    if(c>=0)return c;
    return c+i_7;
}
long long po(long a, long b){
    if(b==0){
        return 1;
    }
    
    long long z = po(a,b/2);
    z = mod(z*z);
    if(b%2!=0){
        z = mod(a*z);
    }
    return z;
}

bool prime_(int n){
  if(n==1){
    return false;
  }else if(n==2){
    return true;
  }else{
    for(int i=2;i<=std::sqrt(n);i++){
      if(n%i==0){
        return false;
      }
    }
    return true;
  }
}

long long gcd_(long long a, long long b){
  if(a<b){
    std::swap(a,b);
  }
  if(a%b==0){
    return b;
  }else{
    return gcd_(b,a%b);
  }
}
 
long long lcm_(long long x, long long y){
  return (x/gcd_(x,y))*y;
}

//using namespace std;
//using namespace boost::multiprecision;
//using namespace __gnu_pbds;

vector<int> G[55];
vector<int> eset;
bool dfs(int v, int tv, int p = -1){
  if(v == tv){
    return true;
  }
  for(int nv:G[v]){
    if(nv == p)continue;
    dfs(nv, tv, v);
  }
int main(){
  using namespace std;
  int n;
  cin>>n;
  int a[n-1], b[n-1];
  REP(i,n-1){
    cin>>a[i]>>b[i];
    a[i]--;b[i]--;
    G[a[i]].push_back(b[i]);
    G[b[i]].push_back(a[i]);
  }
  return 0;
}


Compiler output:
a.cc:69:1: error: 'vector' does not name a type
   69 | vector<int> G[55];
      | ^~~~~~
a.cc:70:1: error: 'vector' does not name a type
   70 | vector<int> eset;
      | ^~~~~~
a.cc: In function 'bool dfs(int, int, int)':
a.cc:75:14: error: 'G' was not declared in this scope
   75 |   for(int nv:G[v]){
      |              ^
a.cc:79:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   79 | int main(){
      |         ^~
a.cc:79:9: note: remove parentheses to default-initialize a variable
   79 | int main(){
      |         ^~
      |         --
a.cc:79:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:79:11: error: a function-definition is not allowed here before '{' token
   79 | int main(){
      |           ^
a.cc:91:2: error: expected '}' at end of input
   91 | }
      |  ^
a.cc:71:36: note: to match this '{'
   71 | bool dfs(int v, int tv, int p = -1){
      |                                    ^
a.cc:91:2: warning: control reaches end of non-void function [-Wreturn-type]
   91 | }
      |  ^
Language: C++

#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif
#include<bits/stdc++.h>
#include<chrono>
#include<unordered_map>
#include<random>
#include<complex> 
using namespace std;
#define ll long long
#define ld long double
#define ull unsigned ll 
#define endl '\n'
#define mk make_pair
#ifndef ONLINE_JUDGE
void fast_in_out() {
	std::ios_base::sync_with_stdio(NULL);
	cin.tie(NULL); cout.tie(NULL);

}
int dx[] = { 0,0,-1,1,-1,1,-1,1,0 };
int dy[] = { -1,1,0,0,-1,-1,1,1,0 };
int lx[] = { 2, 2, -1, 1, -2, -2, -1, 1 };
int ly[] = { -1, 1, 2, 2, 1, -1, -2, -2 };
const ld eps = 1e-9;
const int N = 1e6 + 50, M = 1e5 + 10, mod = 1e9 + 7;
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { ll t = gcd(a, b); return t ? (a / t * b) : 0; }
vector<vector<pair<int,int>>>adj;
int edg[55];
bool dfs(int u,int v,int par,int i) {
	if (u == v) return 1;
	bool flag = 0;
	for(auto e:adj[u])
		if (e.first != par) {
			if (dfs(e.first, v, u, i)) {
				flag = 1;
				edg[e.second] |= (1 << i);
			}

		}
	return flag;
}
int main() {
	fast_in_out();
//	cout << fixed << setprecision(6);
	cin >> n;
	adj.resize(n + 1);
	for (int i = 1; i < n; i++) {
		int u, v;
		cin >> u >> v;
		adj[u].push_back({ v,i });
		adj[v].push_back({ u,i });
	}
	cin >> m;
	for (int i = 0; i < m; i++) {
		int u, v;
		cin >> u >> v;
		dfs(u, v, -1, i);
	}
	ll ans = (1LL << (n - 1));
	for (int mask = 1; mask < (1 << m); ++mask) {
		int cnt = __builtin_popcount(mask);
		int black = 0;
		for (int i = 1; i < n; i++)
			if (edg[i] & mask)++black;
		if (cnt & 1) ans -= (1LL << (n - 1 - black));
		else ans += (1LL << (n - 1 - black));
	}
	cout << ans;
	return 0;
}

Compiler output:
a.cc:15: error: unterminated #ifndef
   15 | #ifndef ONLINE_JUDGE
a.cc: In function 'int main()':
a.cc:47:16: error: 'n' was not declared in this scope
   47 |         cin >> n;
      |                ^
a.cc:55:16: error: 'm' was not declared in this scope
   55 |         cin >> m;
      |                ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, a, b) for (int i = (a); i < (b); i++)
//#include "library/debug.cpp"

vector<vector<ll>> g(55);
ll n, m;
map<pair<ll, ll>, ll> mp;

ll dfs(ll a, ll b, ll p = -1) {
    ll res = 0;
    for (auto u : g[a])
        if (u != p) {
            if (u == b) {
                assert(mp[{a, u}] != 0);
                res = 1LL << (mp[{a, b}] - 1);
                return res;
            }
            res = dfs(u, b, a);
            if (res) {
                assert(mp[{a, u}] != 0);
                res |= 1LL << (mp[{a, u}] - 1);
                break;
            }
        }
    return res;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    cin >> n;
    rep(i, 1, n) {
        ll a, b;
        cin >> a >> b;
        g[a].emplace_back(b);
        g[b].emplace_back(a);
        mp[{a, b}] = mp[{b, a}] = i;
    }
    cin >> m;
    vector<ll> y(m);
    rep(i, 0, m) {
        ll u, v;
        cin >> u >> v;
        y[i] = dfs(u, v);
    }
    ll ans = 1LL << (n - 1);
    for (ll b = 1; b < (1LL << m); b++) {
        ll d = 0;
        ll c = 1;
        rep(i, 0, m) if ((b >> i) & 1LL) {
            c *= -1;
            d |= y[i];
        }
        ans += c * (1LL << (n - 1 - __builtin_popcount(d)));
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc:16:39: error: macro "assert" passed 2 arguments, but takes just 1
   16 |                 assert(mp[{a, u}] != 0);
      |                                       ^
In file included from /usr/include/c++/14/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:106,
                 from a.cc:1:
/usr/include/assert.h:102:11: note: macro "assert" defined here
  102 | #  define assert(expr)                                                  \
      |           ^~~~~~
a.cc:22:39: error: macro "assert" passed 2 arguments, but takes just 1
   22 |                 assert(mp[{a, u}] != 0);
      |                                       ^
/usr/include/assert.h:102:11: note: macro "assert" defined here
  102 | #  define assert(expr)                                                  \
      |           ^~~~~~
a.cc: In function 'll dfs(ll, ll, ll)':
a.cc:16:17: error: 'assert' was not declared in this scope
   16 |                 assert(mp[{a, u}] != 0);
      |                 ^~~~~~
a.cc:2:1: note: 'assert' is defined in header '<cassert>'; this is probably fixable by adding '#include <cassert>'
    1 | #include <bits/stdc++.h>
  +++ |+#include <cassert>
    2 | using namespace std;
a.cc:22:17: error: 'assert' was not declared in this scope
   22 |                 assert(mp[{a, u}] != 0);
      |                 ^~~~~~
a.cc:22:17: note: 'assert' is defined in header '<cassert>'; this is probably fixable by adding '#include <cassert>'
Language: C++

#include <bits/stdc++.h>
using namespace std;

#define REP(i, n) for(int64_t i = 0; i < n; i++)
#define REPR(i, n) for(int64_t i = n; i >= 0; i--)
#define FOR(i, m, n) for(int64_t i = m; i < n; i++)
#define FORR(i, m, n) for(int64_t i = m; i >= n; i--)
#define ALL(v) v.begin(), v.end()
typedef long long ll;
template<typename A, size_t N, typename T>
void Fill(A (&array)[N], const T &val){
    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;}
const ll INF= 1ll << 60;
const ll MOD = 1000000007;
double EPS = 1e-10;
//----------------------------------------------------------

int N, M;
vector<int> E[50];
ll M[20];
ll A[1<<20];
map<pair<int,int>,int> edges;
ll dfs(int u, int v, int p)
{
    if(u==v)return 0;
    for(int x: E[u])
    {
        if(x==p)continue;
        ll b = dfs(x,v,u);
        if(b!=-1)return (1LL << edges[{u,x}]) | b;
    }
}

int main(){
    cin >> N;
    REP(i,N-1){
        int a, b;
        cin >> a >> b;
        E[a-1].push_back(b-1);
        E[b-1].push_back(a-1);
        edges[{a-1,b-1}]=i;
        edges[{b-1,a-1}]=i;
    }
    cin >> M;
    REP(i,M){
        int u, v;
        cin >> u >> v;
        M[i] = dfs(u-1,v-1,-1);
    }
    ll ans = 1LL << (N-1);
    for(int i = 1; i < (1<<m); i++){
        A[i] = A[i&(i-1)] | M[__builtin_ctzll(i)];
        ll x = 1LL << (n-1-__builtin_popcountll(A[i]));
        ans += (1-2*__builtin_parity(i))*x;
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc:25:4: error: conflicting declaration 'll M [20]'
   25 | ll M[20];
      |    ^
a.cc:23:8: note: previous declaration as 'int M'
   23 | int N, M;
      |        ^
a.cc: In function 'int main()':
a.cc:53:10: error: invalid types 'int[int64_t {aka long int}]' for array subscript
   53 |         M[i] = dfs(u-1,v-1,-1);
      |          ^
a.cc:56:28: error: 'm' was not declared in this scope
   56 |     for(int i = 1; i < (1<<m); i++){
      |                            ^
a.cc:57:30: error: invalid types 'int[int]' for array subscript
   57 |         A[i] = A[i&(i-1)] | M[__builtin_ctzll(i)];
      |                              ^
a.cc:58:24: error: 'n' was not declared in this scope
   58 |         ll x = 1LL << (n-1-__builtin_popcountll(A[i]));
      |                        ^
a.cc: In function 'll dfs(int, int, int)':
a.cc:37:1: warning: control reaches end of non-void function [-Wreturn-type]
   37 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, N) for (int i = 0; i < (int)N; ++i)
#define all(a) (a).begin(), (a).end()

int N;

struct Edge {
  int from, to;
  bitset<20> constraitns;
}

struct Constraint {
  int u, v;
};
int main() {
  cin >> N;
  vector<vector<int>> G(N);
  vector<Edge> E(N - 1);
  rep(i, N - 1) {
    int a, b;
    cin >> a >> b;
    --a, --b;
    G[a].push_back(b);
    G[b].push_back(a);
    E[i] = Edge{a, b, 0};
  }

  int M;
  cin >> M;

  function<void(int, int, int, int)> append =
      [&](int u, int v, int p, int c) {
        if (u == v) return;
        for (auto w : G[u]) {
          if (w == p) continue;
          E[edge(u, w)].set(c);
          append(w, v, u, c);
        }
      }

  rep(i, M) {
    int u, v;
    cin >> u >> v;
    --u, --v;
    append(u, v, -1, i);
  }

  vector<vector<int>> dp((1 << M), vector<int>(N, 0));
  dp[0][0] = 1;
  rep(s, (1 << M)) rep(i, N - 1) {
    dp[s | E[i].constrains][i + 1] += dp[s][i];  // B
    dp[s][i + 1] += dp[s][i];                    // W
  }

  cout << dp[(1 << M) - 1][N] << endl;

  return 0;
}


Compiler output:
a.cc:12:2: error: expected ';' after struct definition
   12 | }
      |  ^
      |  ;
a.cc: In lambda function:
a.cc:38:13: error: 'edge' was not declared in this scope; did you mean 'Edge'?
   38 |           E[edge(u, w)].set(c);
      |             ^~~~
      |             Edge
a.cc: In function 'int main()':
a.cc:4:19: error: expected ',' or ';' before 'for'
    4 | #define rep(i, N) for (int i = 0; i < (int)N; ++i)
      |                   ^~~
a.cc:43:3: note: in expansion of macro 'rep'
   43 |   rep(i, M) {
      |   ^~~
a.cc:43:7: error: 'i' was not declared in this scope
   43 |   rep(i, M) {
      |       ^
a.cc:4:35: note: in definition of macro 'rep'
    4 | #define rep(i, N) for (int i = 0; i < (int)N; ++i)
      |                                   ^
a.cc:53:17: error: '__gnu_cxx::__alloc_traits<std::allocator<Edge>, Edge>::value_type' {aka 'struct Edge'} has no member named 'constrains'; did you mean 'constraitns'?
   53 |     dp[s | E[i].constrains][i + 1] += dp[s][i];  // B
      |                 ^~~~~~~~~~
      |                 constraitns
Language: C++

50
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
10 11
11 12
12 13
13 14
14 15
15 16
16 17
17 18
18 19
19 20
20 21
21 22
22 23
23 24
24 25
25 26
26 27
27 28
28 29
29 30
30 31
31 32
32 33
33 34
34 35
35 36
36 37
37 38
38 39
39 40
40 41
41 42
42 43
43 44
44 45
45 46
46 47
47 48
48 49
49 50
1
1 50

Compiler output:
a.cc:1:1: error: expected unqualified-id before numeric constant
    1 | 50
      | ^~
Language: C++

#include <cstdio>
#include <vector>

int scan() {
  int r = 0;
  int c;
  while ((c = getchar_unlocked() - '0') >= 0)
    r = r * 10 + c;
  return r;
}

int main() {
  const int n = scan();
  std::vector<std::vector<int>> t(n);
  for (int i = 0; i != n - 1; i += 1) {
    const int a = scan() - 1;
    const int b = scan() - 1;
    t[a].push_back(b);
    t[b].push_back(a);
  }
  const int m = scan();
  const int s = 1 << m;
  std::vector<int> z(s, 0);
  {
    std::vector<int> x(n, 0);
    for (int i = 0; i != m; i += 1) {
      const int u = scan() - 1;
      const int v = scan() - 1;
      x[u] ^= 1 << i;
      x[v] ^= 1 << i;
    }
    const auto dfs = [&](const auto &dfs, int v, int p) {
      for (int e : t[v]) {
        if (e != p) {
          dfs(dfs, e, v);
          z[x[e]] += 1;
          x[v] ^= x[e];
        }
      }
    };
    dfs(dfs, 0, n);
  }
  for (int w = 1; w != s; w <<= 1) {
    for (int i = 0; i != s; i += w << 1) {
      const int end = i + w;
      for (int j = i; j != end; j += 1) {
        z[j + w] += z[j];
      }
    }
  }

  long long ans = 0;
  for (int i = 0; i != 1 << m; i += 1) {
    auto res = 1LL << z[s - 1 ^ i];
    if (__builtin_parity(i))
      res = -res;
    ans += res;
  }
  printf("%lld", ans);
}

Compiler output:
a.cc: In instantiation of 'main()::<lambda(const auto:1&, int, int)> [with auto:1 = main()::<lambda(const auto:1&, int, int)>]':
a.cc:41:8:   required from here
   41 |     dfs(dfs, 0, n);
      |     ~~~^~~~~~~~~~~
a.cc:35:14: error: use of 'main()::<lambda(const auto:1&, int, int)> [with auto:1 = main()::<lambda(const auto:1&, int, int)>]' before deduction of 'auto'
   35 |           dfs(dfs, e, v);
      |           ~~~^~~~~~~~~~~
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <unordered_map>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <queue>
#define ll long long
using namespace std;

#define MOD 1000000007

struct Node
{
	int num;
	int dep;
};

class Solver
{
public:
	int n;
	int m;
	vector<vector<int> > adj;
	vector<pair<int, int> > path;
	vector<pair<int, int> > cons;

	Solver() {
		cin >> n;
		adj = vector<vector<int> >(n, vector<int>(n, 0));
		for (int i = 0; i < n - 1; ++i)
		{
			int a, b;
			cin >> a >> b;
			a--;
			b--;
			pair<int, int> p = make_pair(a, b);
			adj[a][b] = 1;
			adj[b][a] = 1;
			path.push_back(p);
		}
		cin >> m;
		for (int i = 0; i < m; ++i)
		{
			int u, v;
			cin >> u >> v;
			u--;
			v--;
			pair<int, int> p = make_pair(u, v);
			cons.push_back(p);
		}
	}

	int dist(int a, int b) {
		int dis = 0;
		Node s_n = {a, 0};
		queue<Node> q;
		vector<int> visited = vector<int>(n, 0);
		q.push(s_n);
		visited[a] = 1;
		while(!q.empty()) {
			Node cur = q.front();
			// cout << cur.num << endl;
			q.pop();
			if(cur.num == b) return cur.dep;
			for (int i = 0; i < n; ++i)
			{
				if(adj[cur.num][i] == 1 && visited[i] == 0) {
					visited[i] = 1;
					Node n_n = {i, cur.dep + 1};
					q.push(n_n);
				}
			}
		}
		return -1;
	}

	void exec() {
		ll ans = pow(2, n-1);
		for (int i = 0; i < m; ++i)
		{
			pair<int, int> p = cons[i];
			ans = ans - pow(2, n - 1 - dist(p.first, p.second));
		}
		cout << ans << endl;
	}

};


int main(){
	Solver co = Solver();
	co.exec(); 
}


Compiler output:
a.cc: In member function 'void Solver::exec()':
a.cc:82:26: error: 'pow' was not declared in this scope
   82 |                 ll ans = pow(2, n-1);
      |                          ^~~