| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 204110 | cheetose | Meetings (JOI19_meetings) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const int MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) { ll ret = 1; for (; b; b >>= 1, a = (a*a) % MMM)if (b & 1)ret = (ret*a) % MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
#include "meetings.h"
Vi v[2005];
void discon(int x,int y)
{
for(int &z:v[x])
{
if(z==y)
{
z=v[x].back();
v[x].back()=y;
}
}
for(int &z:v[y])
{
if(z==x)
{
z=v[y].back();
v[y].back()=x;
}
}
v[x].pop_back();
v[y].pop_back();
}
void con(int x,int y)
{
v[x].pb(y);
v[y].pb(x);
}
bool chk[2005],kill[2005];
int sz[2005];
int getSz(int N,int pp)
{
sz[N]=1;
for(int next:v[N])
{
if(next==pp || kill[next])continue;
sz[N]+=getSz(next,N);
}
return sz[N];
}
int get_centroid(int N,int pp,int cap)
{
for(int next:v[N])
{
if(kill[next] || next==pp)continue;
if(sz[next]>cap) return get_centroid(next,N,cap);
}
return N;
}
void Solve(int N)
{
chk[0]=chk[1]=chk[2]=1;
int w=Query(0,1,2);
if(w>2)
{
chk[w]=1;
con(0,w);con(1,w);con(2,w);
}
else
{
fup(i,0,2,1)if(w!=i)con(i,w);
}
fup(i,3,N-1,1)
{
if(chk[i])continue;
chk[i]=1;
MEM0(kill);
int pr=0;
while(1)
{
int cap=getSz(pr,-1);
int R=get_centroid(pr,-1,cap/2);
kill[R]=1;
Vi w;
fup(j,1,(int)v[R].size()-1,2)
{
int a=v[R][j-1],b=v[R][j];
int x=Query(a,i,b);
if(x==i)
{
int T=Query(R,i,a);
if(T==i)
{
discon(R,a);
con(R,i);con(i,a);
}
else
{
discon(R,b);
con(R,i);con(i,b);
}
goto FIN;
}
else w.pb(x);
}
if(v[R].size()&1)
{
int x=Query(R,i,v[R].back());
if(x==i)
{
discon(R,v[R].back());
con(R,i);con(i,v[R].back());
goto FIN;
}
else w.pb(x);
}
int t=-1;
for(int x:w)if(x!=R)t=x;
if(t==-1)
{
con(R,i);
goto FIN;
}
else
{
pr=t;
}
}
FIN:;
}
}