oj.uz

Submission #122965

# Submission time Handle Problem Language Result Execution time Memory
122965 2019-06-29T17:24:33 Z SuperJava Pipes (BOI13_pipes) C++17
100 / 100
 252 ms 36844 KB 
//fold
#ifndef KHALIL
#include <bits/stdc++.h>
#else
#include "header.h"
#endif
#define endl '\n'
#define mp make_pair
#define tostr(x) static_cast<ostringstream&>((ostringstream()<<dec<<x)).str()
#define rep(i,begin,end) for(auto i = begin;i < end;i++)
#define repr(i,begin,end) for(auto i = begin-1;i >= end;i--)
#define pb push_back
#define sz(a) ((int)(a).size())
#define fi first
#define se second
#define abs(a) ((a) < (0) ? (-1)*(a) : (a))
#define SQ(a) ((a)*(a))
#define eqd(a,b) (abs(a-b)<1e-9)
#define X real()
#define Y imag()
using namespace std;
typedef long long ll;
typedef long double ld;
template <typename t> t in(t q){cin >> q;return q;}
template <typename T> ostream& operator<<(ostream& os, const vector<T>& v){os << "[";for (int i = 0; i < sz(v); ++i) { os << v[i]; if (i != sz(v) - 1) os << ",";}os << "]";return os;}
template <typename T, typename S>ostream& operator<<(ostream& os, const map<T, S>& v){for (auto it : v)os << "(" << it.first << ":" << it.second << ")";return os;}
template <typename T, typename S>ostream& operator<<(ostream& os, const pair<T, S>& v){os << "(" << v.first << "," << v.second << ")";return os;}
const long double PI = acosl(-1);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::steady_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
//endfold
#define  N  (200'005)
#define MOD (1'000'000'007ll)
#define OO (1'050'000'000)
#define OOL (1'100'000'000'000'000'000ll)

//global
set<pair<ll,ll>> s;
set<pair<ll,ll>> adj[N];
ll sum[N];
ll val[N];

vector<ll> res;

void dfs(ll u,ll p){
	res.push_back(u);
	for(auto v:adj[u]){
		if(v.first != p && v.first != res[0]){
			dfs(v.first,u);
			return;
		}
	}
}

int main(){
	//fold
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	cout << setprecision(10);
	//endfold
	ll n,m;
	cin >> n >> m;
	if(m > n) return cout << 0,0;
	rep(i,1,n+1){
		cin >> sum[i];
	}
	rep(i,0,m){
		ll u,v;
		cin >> u >> v;
		adj[u].insert({v,i});
		adj[v].insert({u,i});
	}
	rep(i,1,n+1){
		if(sz(adj[i])) s.insert({sz(adj[i]),i});
	}
	
	while(sz(s) && s.begin()->first == 1){
		ll u = s.begin()->second;
		s.erase(s.begin());
		ll v = adj[u].begin()->first;
		ll edgide = adj[u].begin()->second;
		s.erase({sz(adj[v]),v});
		adj[u].erase(adj[u].begin());
		adj[v].erase({u,edgide});
		val[edgide] = sum[u];
		sum[u] = 0;
		sum[v] -= val[edgide];
		if(sz(adj[v])) s.insert({sz(adj[v]),v});
	}
	if(sz(s) && s.begin()->first == 2){
		dfs(s.begin()->second,0);
		if(sz(res)%2 == 0) return cout << 0,0;
		ll ans = sum[res[0]];
		rep(i,1,sz(res)){
			if(i&1) ans += sum[res[i]];
			else ans -= sum[res[i]];
		}
		ans /= 2;
		ll u = res[0];
		s.erase({sz(adj[u]),u});
		ll v = res[1];
		ll edgide = (*adj[u].lower_bound({v,0})).second;
		s.erase({sz(adj[v]),v});
		adj[u].erase({v,edgide});
		adj[v].erase({u,edgide});
		val[edgide] = ans;
		sum[u] -= val[edgide];
		sum[v] -= val[edgide];
		if(sz(adj[v])) s.insert({sz(adj[v]),v});
	}
	while(sz(s) && s.begin()->first == 1){
		ll u = s.begin()->second;
		s.erase(s.begin());
		ll v = adj[u].begin()->first;
		ll edgide = adj[u].begin()->second;
		s.erase({sz(adj[v]),v});
		adj[u].erase(adj[u].begin());
		adj[v].erase({u,edgide});
		val[edgide] = sum[u];
		sum[u] = 0;
		sum[v] -= val[edgide];
		if(sz(adj[v])) s.insert({sz(adj[v]),v});
	}
	rep(i,0,m){
		cout << val[i]*2 << endl;
	}
	return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9724 KB Output is correct
2 Correct 10 ms 9724 KB Output is correct
3 Correct 11 ms 9976 KB Output is correct
4 Correct 223 ms 30460 KB Output is correct
5 Correct 9 ms 9720 KB Output is correct
6 Correct 9 ms 9720 KB Output is correct
7 Correct 10 ms 9848 KB Output is correct
8 Correct 9 ms 9848 KB Output is correct
9 Correct 11 ms 9976 KB Output is correct
10 Correct 11 ms 9976 KB Output is correct
11 Correct 11 ms 9948 KB Output is correct
12 Correct 11 ms 9976 KB Output is correct
13 Correct 178 ms 26204 KB Output is correct
14 Correct 214 ms 29296 KB Output is correct
15 Correct 237 ms 30584 KB Output is correct
16 Correct 190 ms 27384 KB Output is correct
17 Correct 236 ms 30552 KB Output is correct
18 Correct 248 ms 30584 KB Output is correct
19 Correct 193 ms 30584 KB Output is correct
20 Correct 12 ms 9720 KB Output is correct
21 Correct 11 ms 9976 KB Output is correct
22 Correct 228 ms 30516 KB Output is correct
23 Correct 173 ms 26232 KB Output is correct
24 Correct 237 ms 30584 KB Output is correct
25 Correct 240 ms 27128 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Output is correct
2 Correct 13 ms 10104 KB Output is correct
3 Correct 206 ms 32260 KB Output is correct
4 Correct 10 ms 9720 KB Output is correct
5 Correct 10 ms 9720 KB Output is correct
6 Correct 12 ms 9720 KB Output is correct
7 Correct 10 ms 9720 KB Output is correct
8 Correct 10 ms 9720 KB Output is correct
9 Correct 10 ms 9848 KB Output is correct
10 Correct 10 ms 9724 KB Output is correct
11 Correct 10 ms 9720 KB Output is correct
12 Correct 10 ms 9720 KB Output is correct
13 Correct 10 ms 9720 KB Output is correct
14 Correct 9 ms 9720 KB Output is correct
15 Correct 10 ms 9976 KB Output is correct
16 Correct 11 ms 9976 KB Output is correct
17 Correct 11 ms 9976 KB Output is correct
18 Correct 10 ms 9768 KB Output is correct
19 Correct 10 ms 9720 KB Output is correct
20 Correct 10 ms 9720 KB Output is correct
21 Correct 10 ms 9720 KB Output is correct
22 Correct 13 ms 9976 KB Output is correct
23 Correct 190 ms 30548 KB Output is correct
24 Correct 232 ms 34424 KB Output is correct
25 Correct 189 ms 32112 KB Output is correct
26 Correct 10 ms 9720 KB Output is correct
27 Correct 9 ms 9720 KB Output is correct
28 Correct 9 ms 9720 KB Output is correct
29 Correct 9 ms 9720 KB Output is correct
30 Correct 208 ms 33528 KB Output is correct
31 Correct 216 ms 36844 KB Output is correct
32 Correct 252 ms 31860 KB Output is correct
33 Correct 197 ms 34168 KB Output is correct
34 Correct 10 ms 9720 KB Output is correct
35 Correct 10 ms 9724 KB Output is correct
36 Correct 9 ms 9720 KB Output is correct
37 Correct 9 ms 9720 KB Output is correct
38 Correct 213 ms 33912 KB Output is correct
39 Correct 234 ms 31224 KB Output is correct
40 Correct 237 ms 34040 KB Output is correct
41 Correct 152 ms 36340 KB Output is correct
42 Correct 10 ms 9720 KB Output is correct
43 Correct 10 ms 9720 KB Output is correct
44 Correct 10 ms 9720 KB Output is correct
45 Correct 9 ms 9720 KB Output is correct
46 Correct 210 ms 33528 KB Output is correct
47 Correct 227 ms 34184 KB Output is correct
48 Correct 220 ms 36592 KB Output is correct
49 Correct 220 ms 30072 KB Output is correct
50 Correct 9 ms 9720 KB Output is correct
51 Correct 9 ms 9720 KB Output is correct
52 Correct 9 ms 9720 KB Output is correct
53 Correct 9 ms 9720 KB Output is correct
54 Correct 228 ms 33016 KB Output is correct