oj.uz

Submission #403672

# Submission time Handle Problem Language Result Execution time Memory
403672 2021-05-13T11:05:52 Z errorgorn None (KOI16_laser) C++17
19 / 100
 1977 ms 65540 KB 
//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

const double EPS=1e-9;

int n;
ii arr[1005];
ii brr[2005];

const int s=420,t=421;
const int BUF=105;

double cost[425][425];
int cap[425][425];

double sq(double i){
	return i*i;
}

double dist(int i,int j){
	return sqrt(sq(arr[i].fi-brr[j].fi)+sq(arr[i].se-brr[j].se));
}

double w[425];
int p[425];
bool inq[425];
queue<int> q;

void SPFA(int i,int j){
	rep(x,0,425) w[x]=2e12;
	w[i]=0;
	
	inq[i]=true,q.push(i);
	
	while (!q.empty()){
		int node=q.front();
		q.pop();
		inq[node]=false;
		
		rep(x,0,425) if (cap[node][x]>0 && w[x]-EPS>w[node]+cost[node][x]){
			w[x]=w[node]+cost[node][x];
			p[x]=node;
			
			if (!inq[x]){
				inq[x]=true,q.push(x);
			}
		}
	}
}

vector<int> ans[105];

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n;
	rep(x,0,n) cin>>arr[x].fi>>arr[x].se;
	rep(x,0,2*n) cin>>brr[x].fi>>brr[x].se;
	
	rep(x,0,n){
		rep(y,0,2*n){
			cost[x][y+2*BUF]=cost[x+BUF][y+2*BUF]=dist(x,y);
			cost[y+2*BUF][x]=cost[y+2*BUF][x+BUF]=-dist(x,y);
			
			cap[x][y+2*BUF]=cap[x+BUF][y+2*BUF]=1;
		}
	}
	
	rep(x,0,n) cap[s][x]=cap[s][x+BUF]=1;
	rep(y,0,2*n) cap[y+2*BUF][t]=1;
	
	while (true){
		SPFA(s,t);
		
		//cout<<w[t]<<endl;
		if (w[t]>1e12) break;
		
		vector<int> v={t};
		
		while (v.back()!=s){
			v.pub(p[v.back()]);
		}
		
		reverse(all(v));
		
		//the cap is definitely 1
		rep(x,0,sz(v)-1){
			//cout<<"debug: "<<v[x]<<" "<<v[x+1]<<endl;
			cap[v[x]][v[x+1]]--;
			cap[v[x+1]][v[x]]++;
		}
		//cout<<endl;
	}
	
	rep(x,0,n){
		rep(y,0,2*n){
			if (cap[x][y+2*BUF]==0) ans[x].pub(y);
			if (cap[x+BUF][y+2*BUF]==0) ans[x].pub(y);
		}
	}
	
	rep(x,0,n){
		cout<<ans[x][0]+1<<" "<<ans[x][1]+1<<endl;
	}
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Runtime error 70 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 320 ms 1728 KB Output is correct
2 Correct 232 ms 1356 KB Output is correct
3 Correct 285 ms 1520 KB Output is correct
4 Correct 144 ms 1740 KB Output is correct
5 Correct 147 ms 1756 KB Output is correct
6 Correct 201 ms 2036 KB Output is correct
7 Correct 66 ms 1356 KB Output is correct
8 Correct 317 ms 2308 KB Output is correct
9 Correct 155 ms 1740 KB Output is correct
10 Correct 226 ms 2176 KB Output is correct
11 Correct 1866 ms 2340 KB Output is correct
12 Correct 1769 ms 2328 KB Output is correct
13 Correct 1977 ms 2252 KB Output is correct
14 Correct 1865 ms 2336 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Runtime error 70 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 34.0

# Verdict Execution time Memory Grader output
1 Runtime error 70 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -