#include <bits/stdc++.h>
#include <unordered_map>
using namespace std;
typedef long long ll;
typedef vector <ll> row;
typedef vector <row> matrix;
#define endl '\n'
#define fast ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define all(v) ((v).begin()), ((v).end())
#define allR(v) ((v).rbegin()), ((v).rend())
#define For(i,n) for(int i=0;i<(int)(n);i++)
#define sz(v) v.size()
#define swapS(a,b) if(a>b) swap(a,b)
const ll mod = 1e9+7;
const ll OO = 1e18;
const ll invalid = -1e18;
int dx[] = {0,0,-1,1,1,1,-1,-1};
int dy[] = {1,-1,0,0,1,-1,-1,1};
ll fixMod(ll x){
return ((x%mod) + mod) % mod;
}
ll lcm(ll a,ll b){
return max(a,b)/__gcd(a,b)*min(a,b);
}
ll power(ll a,ll b){
if(b==0) return 1;
if(b==1) return a%mod;
if(b&1){
ll y=power(a,b/2)%mod;
return ((y*y)%mod*a)%mod;
}
else {
ll y=power(a,b/2)%mod;
return (y*y)%mod;
}
}
ll inv(ll n){
return power(n,(mod-2));
}
matrix zero(int n,int m){
return matrix(n,row(m,0));
}
matrix identity(int n){
matrix ret = zero(n,n);
for(int i=0;i<n;i++){
ret[i][i] = 1;
}
return ret;
}
matrix multiply(const matrix &a, const matrix &b){
matrix ret = zero(a.size(),b[0].size());
for(int i=0;i<a.size();i++){
for(int k=0;k<a[0].size();k++){
for(int j=0;j<b[0].size();j++){
ret[i][j] += a[i][k] * b[k][j];
ret[i][j] = ret[i][j];
}
}
}
return ret;
}
matrix matrixPower(matrix &a,ll b){
if(b == 0) return identity(a.size());
if(b == 1) return a;
matrix r = matrixPower(a,b/2);
if(b&1) return multiply(multiply(r,r),a);
return multiply(r,r);
}
void solve(){
int n,m;
cin>>n>>m;
for(int i=0;i<n-1;i++){
int x,y;
cin>>x>>y;
}
ll a=1e18,b=0;
for(int i=0;i<m;i++){
ll u,v;
cin>>u>>v;
a = min(a,u);
b = max(v,b);
}
cout<<(power(2,((a-1)+(n+1-(b+1))))*2)%mod<<endl;
}
int main()
{
fast
ll t=1;
// cin>>t;
while(t--){
//Some important Notes:
// 1- Any minus with mod fixed mod
// 2- Any divide with mod inverse
// 3- Any mod problem make mod in every where
// 4- Any dp problem don't forget to return the saved value :)
solve();
}
return 0;
}
Compilation message
usmjeri.cpp: In function 'matrix multiply(const matrix&, const matrix&)':
usmjeri.cpp:52:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | for(int i=0;i<a.size();i++){
| ~^~~~~~~~~
usmjeri.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
53 | for(int k=0;k<a[0].size();k++){
| ~^~~~~~~~~~~~
usmjeri.cpp:54:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | for(int j=0;j<b[0].size();j++){
| ~^~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
58 ms |
3600 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
120 ms |
7328 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
412 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
332 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
126 ms |
7956 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
131 ms |
7956 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
134 ms |
7964 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
131 ms |
8080 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
