oj.uz

Submission #51119

# Submission time Handle Problem Language Result Execution time Memory
51119 2018-06-16T06:01:28 Z Utaha Duathlon (APIO18_duathlon) C++14
23 / 100
 287 ms 49560 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<double,double> pdd;
#define IOS ios_base::sync_with_stdio(0); cin.tie(0)
#define ALL(a) a.begin(),a.end()
#define SZ(a) ((int)a.size())
#define F first
#define S second
#define REP(i,n) for(int i=0;i<((int)n);i++)
#define pb push_back
#define MP(a,b) make_pair(a,b)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define GET_POS(c,x) (lower_bound(c.begin(),c.end(),x)-c.begin())
#ifdef leowang
#define debug(...) do{\
	fprintf(stderr,"%s - %d : (%s) = ",__PRETTY_FUNCTION__,__LINE__,#__VA_ARGS__);\
	_DO(__VA_ARGS__);\
}while(0)
template<typename I> void _DO(I&&x){cerr<<x<<endl;}
template<typename I,typename...T> void _DO(I&&x,T&&...tail){cerr<<x<<", ";_DO(tail...);}
#else
#define debug(...)
#endif
template<typename T1,typename T2>
ostream& operator<<(ostream& out,pair<T1,T2> P){
	out<<'('<<P.F<<','<<P.S<<')';
	return out;
}
//}}}
const ll maxn=200005;
const ll maxlg=__lg(maxn)+2;
const ll INF64=8000000000000000000LL;
const int INF=0x3f3f3f3f;
const ll MOD=ll(1e9+7);
const double PI=acos(-1);
//const ll p=880301;
//const ll P=31;

ll mypow(ll a,ll b){
	ll res=1LL;
	while(b){
		if(b&1) res=res*a%MOD;
		a=a*a%MOD;
		b>>=1;
	}
	return res;
}
vector<int> comp;
vector<int> child[maxn];
bool vis[maxn];

int low[maxn];
int h[maxn];

vector<int> id[maxn];
int BCCpt=0;
vector<pii> q;
vector<int> curBCC;
ll sz[maxn];

void dfs(int u,int t,int p,int H){
	comp.pb(u);
	vis[u]=1;
	low[u]=u;
	h[u]=H;
	for(int v:child[u]) if(v!=p){
		q.pb(MP(u,v));
		if(vis[v]){
			if(h[low[u]]>h[v]) low[u]=v;
		}
		else{
			dfs(v,t+1,u,H+1);
			if(h[low[u]]>h[low[v]]) low[u]=low[v];
			else if(h[low[v]]>h[u]){
				curBCC.clear();
				while(SZ(q)){
					pii tmp=q.back();
					curBCC.pb(tmp.F);
					curBCC.pb(tmp.S);
					q.pop_back();
					if(tmp==MP(u,v)) break;
				}
				SORT_UNIQUE(curBCC);
				for(int i:curBCC) id[i].pb(BCCpt);
				BCCpt++;
			}
		}
	}
}
vector<int> G[maxn];
ll ans=0;
bool bis[maxn];
ll dfs(int u,bool isthin){
	bis[u]=1;
	ll rem=SZ(comp)-sz[u];
	ll tt=(ll)rem*rem;
	ll sq=0;
	ll cnt=0;
	for(int v:G[u]) if(!bis[v]){
		ll tmp=dfs(v,!isthin);
		cnt++;
		rem-=tmp;
		tt-=(ll)tmp*tmp;
		sq+=(ll)tmp*tmp;
	}
	tt-=(ll) rem*rem;
	ans+=tt*sz[u];

	ans+=(ll)sz[u]*(sz[u]-1)*(SZ(comp)-sz[u])*2;
	ans+=(ll)sz[u]*(sz[u]-1)*(sz[u]-2);

	if(rem!=0){
		cnt++;
		sq+=(ll) rem*rem;
	}

	if(isthin){
		ll tmp=(ll)cnt*SZ(comp)*SZ(comp)-(ll)cnt*sq+2LL*sq-2LL*SZ(comp)*(SZ(comp)-sz[u])-(ll)cnt*sz[u];
		//cout<<u<<' '<<tmp<<'\n';
		ans+=tmp;
	}
	//cout<<u<<' '<<ans<<'\n';
	return SZ(comp)-rem;
}

int main()
{
	//IOS;
	int n;
	int m;
	cin>>n>>m;
	REP(i,m){
		int u,v;
		cin>>u>>v;
		u--;v--;
		child[u].pb(v);
		child[v].pb(u);
	}
	REP(x,n) if(!vis[x]){
		comp.clear();
		dfs(x,0,-1,0);

		REP(i,BCCpt) sz[i]=0;
		for(int i:comp){	
			if(SZ(id[i])==1){
				sz[id[i][0]]++;
			}
			else{
				int u=BCCpt++;
				for(int v:id[i]){
					G[u].pb(v);
					G[v].pb(u);
				}
				sz[u]=1;
			}
		}
		
		dfs(0,1);
		REP(i,BCCpt){
			bis[i]=0;
			G[i].clear();
		}
		BCCpt=0;
	}
	cout<<ans;
	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 14 ms 14456 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 14 ms 14456 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 158 ms 33232 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 33232 KB Output is correct
2 Correct 15 ms 33232 KB Output is correct
3 Correct 15 ms 33232 KB Output is correct
4 Correct 14 ms 33232 KB Output is correct
5 Correct 15 ms 33232 KB Output is correct
6 Correct 14 ms 33232 KB Output is correct
7 Correct 15 ms 33232 KB Output is correct
8 Correct 14 ms 33232 KB Output is correct
9 Correct 17 ms 33232 KB Output is correct
10 Correct 15 ms 33232 KB Output is correct
11 Correct 14 ms 33232 KB Output is correct
12 Correct 14 ms 33232 KB Output is correct
13 Correct 15 ms 33232 KB Output is correct
14 Correct 14 ms 33232 KB Output is correct
15 Correct 14 ms 33232 KB Output is correct
16 Correct 14 ms 33232 KB Output is correct
17 Correct 14 ms 33232 KB Output is correct
18 Correct 14 ms 33232 KB Output is correct
19 Correct 14 ms 33232 KB Output is correct
20 Correct 14 ms 33232 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 211 ms 33232 KB Output is correct
2 Correct 213 ms 33232 KB Output is correct
3 Correct 219 ms 33232 KB Output is correct
4 Correct 218 ms 33232 KB Output is correct
5 Correct 201 ms 33232 KB Output is correct
6 Correct 258 ms 49560 KB Output is correct
7 Correct 287 ms 49560 KB Output is correct
8 Correct 223 ms 49560 KB Output is correct
9 Correct 261 ms 49560 KB Output is correct
10 Correct 206 ms 49560 KB Output is correct
11 Correct 203 ms 49560 KB Output is correct
12 Correct 208 ms 49560 KB Output is correct
13 Correct 233 ms 49560 KB Output is correct
14 Correct 168 ms 49560 KB Output is correct
15 Correct 171 ms 49560 KB Output is correct
16 Correct 108 ms 49560 KB Output is correct
17 Correct 161 ms 49560 KB Output is correct
18 Correct 180 ms 49560 KB Output is correct
19 Correct 182 ms 49560 KB Output is correct
20 Correct 199 ms 49560 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 49560 KB Output is correct
2 Correct 15 ms 49560 KB Output is correct
3 Incorrect 16 ms 49560 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 206 ms 49560 KB Output is correct
2 Correct 225 ms 49560 KB Output is correct
3 Incorrect 219 ms 49560 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 14 ms 14456 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 14 ms 14456 KB Output isn't correct
2 Halted 0 ms 0 KB -