oj.uz

Submission #403684

# Submission time Handle Problem Language Result Execution time Memory
403684 2021-05-13T11:13:35 Z errorgorn None (KOI16_laser) C++17
14 / 100
 2000 ms 3660 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());

#define ld long double

const ld EPS=1e-11;

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

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

ld cost[425][425];
int cap[425][425];

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

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

ld 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;
	
	rep(zzz,0,2*n){
		SPFA(s,t);
		
		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
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 2 ms 460 KB Output is correct
4 Correct 2 ms 460 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 2 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 2 ms 460 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 2 ms 460 KB Output is correct

Subtask #2
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 371 ms 2556 KB Output is correct
2 Correct 256 ms 1948 KB Output is correct
3 Correct 311 ms 2192 KB Output is correct
4 Correct 161 ms 2588 KB Output is correct
5 Correct 189 ms 2636 KB Output is correct
6 Correct 239 ms 3148 KB Output is correct
7 Correct 73 ms 1868 KB Output is correct
8 Correct 378 ms 3608 KB Output is correct
9 Correct 173 ms 2508 KB Output is correct
10 Correct 288 ms 3412 KB Output is correct
11 Execution timed out 2072 ms 3660 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 2 ms 460 KB Output is correct
4 Correct 2 ms 460 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 2 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 2 ms 460 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 2 ms 460 KB Output is correct
25 Correct 371 ms 2556 KB Output is correct
26 Correct 256 ms 1948 KB Output is correct
27 Correct 311 ms 2192 KB Output is correct
28 Correct 161 ms 2588 KB Output is correct
29 Correct 189 ms 2636 KB Output is correct
30 Correct 239 ms 3148 KB Output is correct
31 Correct 73 ms 1868 KB Output is correct
32 Correct 378 ms 3608 KB Output is correct
33 Correct 173 ms 2508 KB Output is correct
34 Correct 288 ms 3412 KB Output is correct
35 Execution timed out 2072 ms 3660 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #4
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 2 ms 460 KB Output is correct
4 Correct 2 ms 460 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 2 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 2 ms 460 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 2 ms 460 KB Output is correct
25 Correct 371 ms 2556 KB Output is correct
26 Correct 256 ms 1948 KB Output is correct
27 Correct 311 ms 2192 KB Output is correct
28 Correct 161 ms 2588 KB Output is correct
29 Correct 189 ms 2636 KB Output is correct
30 Correct 239 ms 3148 KB Output is correct
31 Correct 73 ms 1868 KB Output is correct
32 Correct 378 ms 3608 KB Output is correct
33 Correct 173 ms 2508 KB Output is correct
34 Correct 288 ms 3412 KB Output is correct
35 Execution timed out 2072 ms 3660 KB Time limit exceeded
36 Halted 0 ms 0 KB -