/*
author : abushbandit
contest : ---
*/
#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define ff first
#define ss second
#define pb push_back
#define rep(i,s,f) for(int i = s;i < f;i++)
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#pragma GCC optimize("Ofast,no-stack-protector,fast-math",3)
template <class type1>
using ordered_multiset = tree <type1, null_type, less_equal <type1>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<pair<int,int>> vii;
typedef pair<int,int> pii;
const ll INF = 1e18;
const ll MOD7 = 1e9 + 7;
const ll MOD9 = 998244353;
const ld PI = acos(-1.0);
const int N = 1e5 + 6;
template <class F, class _S>
bool chmin(F &u, const _S &v){
bool flag = false;
if ( u > v ){
u = v; flag |= true;
}
return flag;
}
template <class F, class _S>
bool chmax(F &u, const _S &v){
bool flag = false;
if ( u < v ){
u = v; flag |= true;
}
return flag;
}
int binpow (int a, int n) {
int res = 1;
while (n) {
if (n & 1)
res *= a;
a *= a;
n >>= 1;
}
return res;
}
void start_file(string file){
freopen((file + ".in").c_str(),"r",stdin);
freopen((file + ".out").c_str(),"w",stdout);
}
// for second subtask
vector<pair<int,int>> g[N];
int up[N][30];
int dp[N],dep[N];
int path[N];
// for first subtask
vector<vector<int>> wgt(N);
void dfs(int u,int pr,int de){
dep[u] = de;
for(auto x : g[u]){
if(x.ff != pr){
up[x.ff][0] = u;
dp[x.ff] = dp[u] + path[x.ss];
dfs(x.ff,u,de + 1);
}
}
}
int lca(int a,int b){
if(dep[a] < dep[b])
swap(a,b);
int dis = dep[a] - dep[b];
for(int i = 29;i >= 0;i--)
if(dis & (1 << i)){
a = up[a][i];
}
if(a == b)
return a;
for(int i = 29;i >= 0;i--)
if(up[a][i] != up[b][i]){
a = up[a][i];
b = up[b][i];
}
return up[a][0];
}
void clear(){
for(int i = 0;i < N;i++){
g[i].clear();
path[i] = dep[i] = dp[i] = 0;
for(int j = 0;j < 30;j++)
up[i][j] = 0;
}
return;
}
void scndfs(int n,int p,vector<pair<int,vector<int>>> &pr){
// cout << n << endl;
// pair<int,vector<int>> q;
// q.ff = p;
// q.ss = v;
// pr[n] = q;
for(auto to : g[n]){
if(to.ff != p){
pr[to.ff] = {n,wgt[to.ss]};
// cout << "ans" << endl;
scndfs(to.ff,n,pr);
}
}
}
void solve(int tc){
clear();
int n,m,q;
cin >> n >> m >> q;
if(n <= 2000 && m <= 2000 && q <= 2000){
// int a[n],b[n];
for(int i = 0;i < n - 1;i++){
int a,b;
cin >> a >> b;
g[a].pb({b,i});
g[b].pb({a,i});
}
for(int i = 0;i < m;i++){
int p,c;
cin >> p >> c;
wgt[p - 1].pb(c);
}
for(int i = 0;i < q;i++){
int s,t,gold,sillver;
cin >> s >> t >> gold >> sillver;
vector<pair<int,vector<int>>> pr(n + 1);
// vector<int> v;
scndfs(s,0,pr);
vector<int> ans;
while(t != s){
for(auto j : pr[t].ss){
ans.pb(j);
}
t = pr[t].ff;
// cout << "asd" << endl;
}
sort(all(ans));
for(auto j : ans){
if(j > sillver){
} else{
gold--;
sillver -= j;
}
}
if(gold < 0){
cout << "-1\n";
} else{
cout << gold << "\n";
}
}
return;
}
for(int i = 0;i < n - 1;i++){
int a,b;
cin >> a >> b;
g[a].push_back({b,i});
g[b].push_back({a,i});
}
int cul;
for(int i = 0;i < m;i++){
int u;
cin >> u >> cul;
path[u - 1]++;
}
dp[1] = 0;
up[1][0] = 1;
dfs(1,1,0);
for(int j = 1;j < 30;j++)
for(int i = 1;i < n + 1;i++){
up[i][j] = up[up[i][j - 1]][j - 1];
}
for(int i = 0;i < q;i++){
int a,b,g,s;
cin >> a >> b >> g >> s;
int lc = lca(a,b);
int dis = dp[a] + dp[b] - 2 * (dp[lc]);
int cnt = s / cul;
dis = max(0ll,dis - cnt);
dis = g - dis;
if(dis < 0)
dis = -1;
cout << dis << "\n";
}
}
signed main(){
ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
// start_file("");
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int test_cases = 1;
// cin >> test_cases ;
for(int tc = 1;tc <= test_cases;++ tc){
solve(tc);
}
}
Compilation message
currencies.cpp: In function 'void start_file(std::string)':
currencies.cpp:75:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
75 | freopen((file + ".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:76:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
76 | freopen((file + ".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
6 ms |
30812 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
6 ms |
30808 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
30812 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
6 ms |
30812 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
