#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;
bool YES(bool f){ if(f) cout << "Yes\n" ; else cout << "No\n" ; return f ; }
void YES(){cout << "Yes\n" ;}
void NO(){cout << "No\n" ;}
void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
//#define ordered_set tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
#define ios ios_base::sync_with_stdio(0) ; cin.tie(0) ; cout.tie(0);
#define int long long
#define ld long double
#define pii pair <int , int>
#define ff first
#define ss second
#define endl '\n'
const int N = 2e5 + 5 ;
const int inf = 1e18 ;
const int mod = 1e9 + 7 ;
const double eps = 1e-8 ;
int binpow( int a , int b ){
if ( b == 0 ) return 1 ;
int x = binpow ( a , b/2 ) ;
if ( !(b%2) ) return (x*x) ;
return (x*x*a) ;
}
template <class T>
bool chmax( T& x , const T& y ){
bool f = 0 ;
if ( x < y ) x = y , f = 1 ;
return f ;
}
template <class T>
bool chmin( T &x , const T &y ){
bool f = 0 ;
if ( x > y ) x = y , f = 1 ;
return f ;
}
//code
int n , m , q , tmp = -2 , l , timer ;
int a[N] , b[N] , c[N] , x[N] , y[N] , f[N] , s[N] , cnt[N] , ans[N] , par[N] , pr[N] , tin[N] , tout[N] ;
int up[N][30] ;
vector <int> ind[N] ;
int r[N] ;
vector <pii> g[N] ;
multiset <int> cur ;
bool dfs ( int v , int s , int p ){
if ( v == s ) return 1 ;
for ( auto to : g[v] ){
if ( to.ff != p ){
if ( to.ss != 0 ) cur.insert(to.ss) ;
if ( !dfs(to.ff,s,v) ) cur.erase(cur.find(to.ss)) ;
else return 1 ;
}
}
return 0 ;
}
void dfs1 ( int v , int p , int sum ){
pr[v] = sum ;
for ( auto to : g[v] ){
if ( to.ff != p ){
sum += to.ss ;
dfs1( to.ff , v , sum ) ;
sum -= to.ss ;
}
}
}
void dfsa( int v , int p ){
tin[v] = ++timer ;
up[v][0] = p ;
for ( int i = 1; i <= l ; i ++ ) up[v][i] = up[up[v][i-1]][i-1] ;
for ( auto to : g[v] ){
if ( to.ff != p ) dfsa(to.ff,v) ;
}
tout[v] = ++timer ;
}
bool upper ( int a , int b ){
return ( tin[a] <= tin[b] && tout[a] >= tout[b] ) ;
}
int lca ( int a , int b ){
if ( upper(a,b) ) return a ;
if ( upper(b,a) ) return b ;
for ( int i = l ; i >= 0 ; i -- ){
if ( !upper(up[a][i] , b) ) a = up[a][i] ;
}
return up[a][0] ;
}
void solve(){
cin >> n >> m >> q ;
while ( ( 1 << (l) ) <= n ) l ++ ;
for ( int i = 1 ; i < n ; i ++ ) {
cin >> a[i] >> b[i] ;
c[i] = inf ;
}
for ( int i = 0 ; i < m ; i ++ ){
int x , y ; cin >> x >> y ;
if ( tmp == -2 ) tmp = y ;
//else if ( tmp != y ) tmp = -1 ;
chmin ( c[x] , y ) ; cnt[x] ++ ;
}
//if ( tmp != -1 ){
for ( int i = 1 ; i < n ; i ++ ){
g[a[i]].push_back({b[i],cnt[i]}) ;
g[b[i]].push_back({a[i],cnt[i]}) ;
}
for ( int i = 0 ; i < q ; i ++ ){
cin >> x[i] >> y[i] >> f[i] >> s[i] ;
s[i] /= tmp ; s[i] += f[i] ;
}
dfsa(1,1) ;
dfs1(1,0,0) ;
for ( int i = 0 ; i < q ; i ++ ){
int par = lca ( x[i] , y[i] ) , cur ;
//cout << x[i] << ' ' << y[i] << ' ' << par << endl ;
if ( par == x[i] ) cur = pr[y[i]]-pr[x[i]] ;
else if ( par == y[i] ) cur = pr[x[i]]-pr[y[i]] ;
else cur = pr[x[i]]+pr[y[i]]-pr[par] ;
if ( s[i] < cur ) cout << "-1\n" ;
else cout << min ( f[i] , s[i]-cur ) << endl ;
}
return ;
//}
for ( int i = 1 ; i < n ; i ++ ){
if ( c[i] == inf ) c[i] = 0 ;
g[a[i]].push_back({b[i],c[i]}) ;
g[b[i]].push_back({a[i],c[i]}) ;
}
for ( int i = 0 ; i < q ; i ++ ) cin >> f[i] >> s[i] >> x[i] >> y[i] ;
for ( int i = 0 ; i < q ; i ++ ){
cur.clear() ;
dfs ( f[i] , s[i] ,0) ;
bool ch = 1 ;
for ( auto j : cur ){
if ( j <= s[i] ) s[i] -= j ;
else f[i] -- ;
if ( f[i]<0 ) ch = 0 ;
}
if (ch) cout << f[i] << endl ;
else cout << "-1\n" ;
}
}
signed main(){
//ios ;
int t = 1 ;
//cin >> t ;
while ( t -- ) solve() ;
}
Compilation message
currencies.cpp: In function 'void fopn(std::string)':
currencies.cpp:10:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
10 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:10:72: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
10 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
31324 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
31324 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
31324 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
31324 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
31324 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
