oj.uz

Submission #207270

# Submission time Handle Problem Language Result Execution time Memory
207270 2020-03-06T21:03:14 Z MvC Pipes (BOI13_pipes) C++11
100 / 100
 108 ms 19332 KB 
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=5e5+50;
const int mod=1e9+7;
using namespace std;
int n,m,i,ex[nmax],ey[nmax],deg[nmax],vl[nmax],vl1[nmax],rs[nmax],viz[nmax],g[nmax],cur,x,y,st;
vector<int>vc,a[nmax];
queue<int>q;
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	if(m>n)rc(0);
	for(i=1;i<=n;i++)cin>>g[i];
	for(i=1;i<=m;i++)
	{
		cin>>ex[i]>>ey[i];
		a[ex[i]].pb(i);
		a[ey[i]].pb(i);
	}
	for(i=1;i<=n;i++)
	{
		deg[i]=(int)a[i].size();
		if(deg[i]==1)q.push(i),viz[i]=1;
	}
	while(!q.empty())
	{
		x=q.front();
		q.pop();
		for(i=0;i<(int)a[x].size();i++)
		{
			y=ex[a[x][i]]^ey[a[x][i]]^x;
			if(!deg[y])continue;
			rs[a[x][i]]=2*(g[x]-vl[x]);
			vl[y]+=g[x]-vl[x];
			vl[x]=g[x];
			deg[y]--;
			deg[x]--;
			if(deg[y]==1)
			{
				viz[y]=1;
				q.push(y);
			}
		}
		deg[x]=0;
	}
	x=0;
	for(i=1;i<=n;i++)if(deg[i])x=i;
	st=x;
	if(st)
	{
		while(1)
		{
			viz[x]=1;
			for(i=0;i<(int)a[x].size();i++)
			{
				y=ex[a[x][i]]^ey[a[x][i]]^x;
				if((!deg[y] || viz[y]) && y!=st)continue;
				vc.pb(a[x][i]);
				x=y;
				break;
			}
			if(st==x)break;
		}
		if((int)vc.size()%2==0)rc(0);
		for(i=1;i<=n;i++)vl1[i]=vl[i];
		x=st;
		for(i=0;i<(int)vc.size();i++)
		{
			y=ex[vc[i]]^ey[vc[i]]^x;
			vl1[y]+=g[x]-vl1[x];
			vl1[x]=g[x];
			x=y;
		}
		cur=(g[x]-vl1[x])/2;
		x=st;
		for(i=0;i<(int)vc.size();i++)
		{
			y=ex[vc[i]]^ey[vc[i]]^x;
			cur+=g[x]-vl[x];
			vl[y]+=cur;
			vl[x]+=cur;
			rs[vc[i]]=2*cur;
			cur=0;
			x=y;
		}
	}
	for(i=1;i<=m;i++)cout<<rs[i]<<'\n';
	return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12152 KB Output is correct
2 Correct 12 ms 12152 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 93 ms 18724 KB Output is correct
5 Correct 12 ms 12152 KB Output is correct
6 Correct 12 ms 12152 KB Output is correct
7 Correct 13 ms 12152 KB Output is correct
8 Correct 12 ms 12152 KB Output is correct
9 Correct 16 ms 12152 KB Output is correct
10 Correct 13 ms 12280 KB Output is correct
11 Correct 14 ms 12152 KB Output is correct
12 Correct 13 ms 12280 KB Output is correct
13 Correct 75 ms 17432 KB Output is correct
14 Correct 83 ms 18424 KB Output is correct
15 Correct 91 ms 18776 KB Output is correct
16 Correct 77 ms 17784 KB Output is correct
17 Correct 86 ms 18652 KB Output is correct
18 Correct 88 ms 18780 KB Output is correct
19 Correct 97 ms 18520 KB Output is correct
20 Correct 13 ms 12152 KB Output is correct
21 Correct 13 ms 12152 KB Output is correct
22 Correct 94 ms 18776 KB Output is correct
23 Correct 71 ms 17400 KB Output is correct
24 Correct 98 ms 18900 KB Output is correct
25 Correct 75 ms 17660 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 13 ms 12152 KB Output is correct
3 Correct 77 ms 18168 KB Output is correct
4 Correct 13 ms 12024 KB Output is correct
5 Correct 12 ms 12024 KB Output is correct
6 Correct 15 ms 12048 KB Output is correct
7 Correct 12 ms 12152 KB Output is correct
8 Correct 12 ms 12156 KB Output is correct
9 Correct 13 ms 12152 KB Output is correct
10 Correct 12 ms 12024 KB Output is correct
11 Correct 12 ms 12024 KB Output is correct
12 Correct 13 ms 12152 KB Output is correct
13 Correct 13 ms 12020 KB Output is correct
14 Correct 13 ms 12152 KB Output is correct
15 Correct 13 ms 12152 KB Output is correct
16 Correct 13 ms 12152 KB Output is correct
17 Correct 13 ms 12152 KB Output is correct
18 Correct 12 ms 12024 KB Output is correct
19 Correct 13 ms 12024 KB Output is correct
20 Correct 12 ms 12024 KB Output is correct
21 Correct 12 ms 12024 KB Output is correct
22 Correct 13 ms 12152 KB Output is correct
23 Correct 96 ms 18036 KB Output is correct
24 Correct 98 ms 19316 KB Output is correct
25 Correct 76 ms 18168 KB Output is correct
26 Correct 13 ms 12028 KB Output is correct
27 Correct 13 ms 12024 KB Output is correct
28 Correct 14 ms 12152 KB Output is correct
29 Correct 12 ms 12024 KB Output is correct
30 Correct 91 ms 19060 KB Output is correct
31 Correct 92 ms 19312 KB Output is correct
32 Correct 87 ms 19192 KB Output is correct
33 Correct 108 ms 18552 KB Output is correct
34 Correct 12 ms 12024 KB Output is correct
35 Correct 12 ms 12152 KB Output is correct
36 Correct 12 ms 12024 KB Output is correct
37 Correct 12 ms 12152 KB Output is correct
38 Correct 92 ms 19208 KB Output is correct
39 Correct 97 ms 19068 KB Output is correct
40 Correct 94 ms 19312 KB Output is correct
41 Correct 83 ms 18680 KB Output is correct
42 Correct 13 ms 12024 KB Output is correct
43 Correct 13 ms 12024 KB Output is correct
44 Correct 12 ms 12024 KB Output is correct
45 Correct 12 ms 12028 KB Output is correct
46 Correct 95 ms 19224 KB Output is correct
47 Correct 98 ms 19256 KB Output is correct
48 Correct 94 ms 19332 KB Output is correct
49 Correct 76 ms 17912 KB Output is correct
50 Correct 14 ms 12024 KB Output is correct
51 Correct 12 ms 12152 KB Output is correct
52 Correct 12 ms 12152 KB Output is correct
53 Correct 12 ms 12024 KB Output is correct
54 Correct 96 ms 19060 KB Output is correct