Submission #241363

#	Time	Username	Problem	Language	Result	Execution time	Memory
241363		kshitij_sodani	Ideal city (IOI12_city)	C++17	11 / 100	1099 ms	3468 KiB

city

#include <bits/stdc++.h>
using namespace std;
typedef int64_t llo;
#define mp make_pair
#define pb push_back
#define a first 
#define b second
//#define endl '\n'
int n;
map<pair<int,int>,int> aa;
vector<int> xx={0,1,0,-1};
vector<int> yy={1,0,-1,0};
int DistanceSum(int nn, int x[], int y[]) {
	n=nn;
	for(int i=0;i<n;i++){
		aa[{x[i],y[i]}]=1;
	}
	llo ans=0;
	for(int i=0;i<n;i++){
		map<pair<int,int>,int> dist;
		dist[{x[i],y[i]}]=0;
		priority_queue<pair<int,pair<int,int>>> ac;
		ac.push({0,{x[i],y[i]}});
		while(ac.size()){
			pair<int,pair<int,int>> tt=ac.top();
			ac.pop();
			tt.a*=(-1);
		//	cout<<tt.a<<","<<tt.b.a<<","<<tt.b.b<<endl;
			for(int j=0;j<4;j++){
				if(aa.find({tt.b.a+xx[j],tt.b.b+yy[j]})==aa.end()){
					continue;
				}
				if(dist.find({tt.b.a+xx[j],tt.b.b+yy[j]})!=dist.end()){
					if(dist[{tt.b.a+xx[j],tt.b.b+yy[j]}]>tt.a+1){
						dist[{tt.b.a+xx[j],tt.b.b+yy[j]}]=tt.a+1;
						ac.push({-tt.a-1,{tt.b.a+xx[j],tt.b.b+yy[j]}});
					}
				}
				else{
					dist[{tt.b.a+xx[j],tt.b.b+yy[j]}]=tt.a+1;
					ac.push({-tt.a-1,{tt.b.a+xx[j],tt.b.b+yy[j]}});
				}
			}
		}
		for(int j=0;j<n;j++){
			ans+=dist[{x[j],y[j]}];
		}
	//	cout<<i<<endl;
	}
	ans/=2;
	ans%=((llo)1e9);
	int ans2=ans;
	return ans2;







	return 0;
}
/*
11
2 5
2 6
3 3
3 6
4 3
4 4
4 5
4 6
5 3
5 4
5 6
*/

/*
g++ -DEVAL -Wall -static -O2 -o aa grader.cpp city.cpp

*/

• Subtask 1: 11 / 11
• Subtask 2: 0 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45