#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <string>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <queue>
#include <deque>
#include <list>
#include <iomanip>
#include <stdlib.h>
#include <time.h>
#include <cstring>
using namespace std;
typedef long long int ll;
typedef unsigned long long int ull;
typedef long double ld;
#define REP(i,a,b) for(ll i=(ll) a; i<(ll) b; i++)
#define pb push_back
#define mp make_pair
#define pl pair<ll,ll>
#define ff first
#define ss second
#define whole(x) x.begin(),x.end()
#define DEBUG(i) cout<<"Pedro "<<i<<endl
#define INF 1000000000000000000LL
#define EPS ((ld)0.00000000001)
#define pi ((ld)3.141592653589793)
#define VV(vvvv,NNNN,xxxx); REP(iiiii,0,NNNN) {vvvv.pb(xxxx);}
ll mod=1000000007;
template<class A=ll>
void Out(vector<A> a) {REP(i,0,a.size()) {cout<<a[i]<<" ";} cout<<endl;}
template<class A=ll>
void In(vector<A> &a, ll N) {A cur; REP(i,0,N) {cin>>cur; a.pb(cur);}}
class WG //everything works for weighted directed graphs except dynamic graph
{
public:
ll N; vector<vector<pl> > adj;
vector<bool> pr;
WG(vector<vector<pl> > ad)
{
adj=ad; N=adj.size();
REP(i,0,N) {pr.pb(false);}
}
vector<ll> Djikstra(ll s)
{
vector<ll> d; REP(i,0,N) {d.pb(INF);}
d[s]=0;
priority_queue<pl> q;
q.push(mp(0,s));
ll cur;
while(!q.empty())
{
cur=q.top().ss; q.pop();
if(pr[cur]) {continue;}
pr[cur]=true;
REP(i,0,adj[cur].size())
{
if(d[adj[cur][i].ff]>d[cur]+adj[cur][i].ss)
{
d[adj[cur][i].ff]=d[cur]+adj[cur][i].ss;
q.push(mp(-d[adj[cur][i].ff],adj[cur][i].ff));
}
}
}
return d;
}
};
vector<vector<pl> > adj;
void add_edge(ll A, ll B, ll we)
{
adj[A].pb({B,we}); adj[B].pb({A,we});
}
ll clockwise(ll dir)
{
if(dir==0) {return 1;}
if(dir==1) {return 0;}
if(dir==2) {return 0;}
if(dir==3) {return 1;}
return 0;
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cout.precision(20);
ll N; vector<pl> p; pl cur; cin>>N; REP(i,0,N) {cin>>cur.ff>>cur.ss; p.pb(cur);}
ll W; cin>>W; vector<vector<pl> > walls(N,vector<pl>()); ll A,B;
ll outside = -1; ll outside_coord = INF;
REP(w,0,W)
{
cin>>A>>B; A--; B--;
if(p[A].ff==p[B].ff)
{
if(p[A].ff<outside_coord) {outside_coord=p[A].ff; outside=w;}
if(p[A].ss>p[B].ss) {swap(A,B);}
walls[A].pb({0,w}); walls[B].pb({2,w});
}
if(p[A].ss==p[B].ss)
{
if(p[A].ff>p[B].ff) {swap(A,B);}
walls[A].pb({1,w}); walls[B].pb({3,w});
}
}
REP(i,0,N) {sort(whole(walls[i]));}
adj = vector<vector<pl> >(2*W,vector<pl>());
REP(i,0,W) {add_edge(2*i,2*i+1,1);}
ll dirA, dirB; ll nodeA, nodeB;
REP(i,0,N)
{
REP(j,0,walls[i].size())
{
A=walls[i][j].ss; dirA = walls[i][j].ff;
B = walls[i][(j+1)%walls[i].size()].ss; dirB = walls[i][(j+1)%walls[i].size()].ff;
nodeA = 2*A+clockwise(dirA); nodeB = 2*B + 1 - clockwise(dirB);
add_edge(nodeA,nodeB,0);
}
}
if(outside==-1)
{
cout<<W<<endl;
REP(i,0,W) {cout<<i+1<<endl;}
return 0;
}
WG G(adj);
vector<ll> d = G.Djikstra(2*outside);
vector<ll> ans;
REP(i,0,W) {if(d[2*i]==d[2*i+1]) {ans.pb(i+1);}}
cout<<ans.size()<<endl; REP(i,0,ans.size()) {cout<<ans[i]<<endl;}
return 0;
}
Compilation message
flood.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
1 | #pragma GCC optimization ("O3")
|
flood.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
2 | #pragma GCC optimization ("unroll-loops")
|
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
600 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
600 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
604 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
47 ms |
14848 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
156 ms |
53960 KB |
Memory limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
201 ms |
59796 KB |
Memory limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
147 ms |
65536 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
189 ms |
65536 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
