oj.uz

Submission #633415

# Submission time Handle Problem Language Result Execution time Memory
633415 2022-08-22T11:51:12 Z IWTIM Putovanje (COCI20_putovanje) C++14
20 / 110
 131 ms 28596 KB 
# include <bits/stdc++.h>
using namespace std;
using ll = long long;
using db = long double; // or double, if TL is tight
using str = string; // yay python! 
 
// pairs
using pii = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
#define mp make_pair
#define f first
#define s second
 
#define tcT template<class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
tcT> using V = vector<T>; 
tcT, size_t SZ> using AR = array<T,SZ>; 
using vi = V<int>;
using vb = V<bool>;
using vl = V<ll>;
using vd = V<db>;
using vs = V<str>;
using vpi = V<pii>;
using vpl = V<pl>;
using vpd = V<pd>;
 
// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sor(x) sort(all(x)) 
#define rsz resize
#define ins insert 
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
 
#define lb lower_bound
#define ub upper_bound
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define rep(a) F0R(_,a)
#define each(a,x) for (auto& a: x)
const int MOD = 998244353;
const int MX = 2e5+5;
const ll BIG = 1e18; // not too close to LLONG_MAX
const db PI = acos((db)-1);
const int dx[4]{1,0,-1,0}, dy[4]{0,1,0,-1}; // for every grid problem!!
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); 
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
struct DSU {
	vi e; void init(int N) { e = vi(N,-1); }
	int get(int x) { return e[x] < 0 ? x : e[x] = get(e[x]); } 
	bool sameSet(int a, int b) { return get(a) == get(b); }
	int size(int x) { return -e[get(x)]; }
	bool unite(int x, int y) { // union by size
		x = get(x), y = get(y); if (x == y) return 0;
		if (e[x] > e[y]) swap(x,y);
		e[x] += e[y]; e[y] = x; return 1;
	}
};
/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void> struct is_iterable : false_type {};
	tcT> struct is_iterable<T, void_t<decltype(begin(declval<T>())),
	                                  decltype(end(declval<T>()))
	                                 >
	                       > : true_type {};
	tcT> constexpr bool is_iterable_v = is_iterable<T>::value;
 
	//////////// is_readable
	tcT, class = void> struct is_readable : false_type {};
	tcT> struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_readable_v = is_readable<T>::value;
 
	//////////// is_printable
	// // https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void> struct is_printable : false_type {};
	tcT> struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cout << declval<T>()), ostream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_printable_v = is_printable<T>::value;
}*/
using ll = long long;
using db = long double; // or double, if TL is tight
using str = string; // yay python! 
 
// pairs
using pii = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
#define mp make_pair
#define f first
#define s second
 
#define tcT template<class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
tcT> using V = vector<T>; 
tcT, size_t SZ> using AR = array<T,SZ>; 
using vi = V<int>;
using vb = V<bool>;
using vl = V<ll>;
using vd = V<db>;
using vs = V<str>;
using vpi = V<pii>;
using vpl = V<pl>;
using vpd = V<pd>;
 
// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sor(x) sort(all(x)) 
#define rsz resize
#define ins insert 
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
 
#define lb lower_bound
#define ub upper_bound
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define rep(a) F0R(_,a)
#define each(a,x) for (auto& a: x)
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
 
/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void> struct is_iterable : false_type {};
	tcT> struct is_iterable<T, void_t<decltype(begin(declval<T>())),
	                                  decltype(end(declval<T>()))
	                                 >
	                       > : true_type {};
	tcT> constexpr bool is_iterable_v = is_iterable<T>::value;
 
	//////////// is_readable
	tcT, class = void> struct is_readable : false_type {};
	tcT> struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_readable_v = is_readable<T>::value;
 
	//////////// is_printable
	// // https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void> struct is_printable : false_type {};
	tcT> struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cout << declval<T>()), ostream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_printable_v = is_printable<T>::value;
}*/
#define f first
#define s second
//#define int long long
#define pii pair <int, int>
#define pb push_back
const int N = 3e5 + 5;
int t,n,a[N], ans,par[N][20],valx[N],valy[N],tin,in[N],out[N],cnt[N];
vector < pair <int, pii > > v[N];
void dfs(int a, int p, int x, int y) {
	par[a][0] = p;
	for (int i = 1; i <= 18; i++) {
		if (par[a][i - 1]) par[a][i] = par[par[a][i - 1]][i - 1];
	}
	valx[a] = x;
	valy[a] = y;
	tin++;
	in[a] = tin;
	for (auto to : v[a]) {
		if (to.f == p) continue;
		dfs(to.f,a, to.s.f, to.s.s);
	}
	out[a] = tin;
}
int upper(int a, int b) {
	return (in[a] <= in[b] && out[a] >= out[b]);
}
int lca(int a, int b) {
	if (upper(a,b)) return a;
	//cout<<in[a]<<" "<<out[a]<<"   "<<in[b]<<" "<<
	for (int i = 18; i >= 0; i--) {
		if (par[a][i] && !upper(par[a][i], b)) a = par[a][i];
	}
	return par[a][0];
}
void dfs1(int a, int p) {
	for (auto to : v[a]) {
		if (to.f == p) continue;
		dfs1(to.f,a);
		cnt[a] += cnt[to.f];
	}
}
main() {
    std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>n;
    for (int i = 1; i <= n - 1; i++) {
    	int a,b,x,y;
    	cin>>a>>b>>x>>y;
		v[a].pb({b,{x,y}});
		v[b].pb({a,{x,y}});
	}
	dfs(1,0,0,0);
	for (int i = 1; i < n; i++) {
		cnt[i]++;
		cnt[i + 1]++;
		cnt[lca(i,i + 1)]-=2;
	}
	dfs1(1,0);
	for (int i = 2; i <= n; i++) {
		ans += min(valy[i], cnt[i]*valx[i]);
	}
	cout<<ans<<"\n";
}

Compilation message

putovanje.cpp:222:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  222 | main() {
      | ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 5 ms 7656 KB Output is correct
3 Correct 5 ms 7636 KB Output is correct
4 Correct 7 ms 7628 KB Output is correct
5 Correct 5 ms 7660 KB Output is correct
6 Correct 4 ms 7392 KB Output is correct
7 Correct 5 ms 7380 KB Output is correct
8 Correct 5 ms 7524 KB Output is correct
9 Correct 4 ms 7636 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 24888 KB Output is correct
2 Correct 122 ms 26056 KB Output is correct
3 Incorrect 131 ms 28596 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 5 ms 7656 KB Output is correct
3 Correct 5 ms 7636 KB Output is correct
4 Correct 7 ms 7628 KB Output is correct
5 Correct 5 ms 7660 KB Output is correct
6 Correct 4 ms 7392 KB Output is correct
7 Correct 5 ms 7380 KB Output is correct
8 Correct 5 ms 7524 KB Output is correct
9 Correct 4 ms 7636 KB Output is correct
10 Correct 103 ms 24888 KB Output is correct
11 Correct 122 ms 26056 KB Output is correct
12 Incorrect 131 ms 28596 KB Output isn't correct
13 Halted 0 ms 0 KB -