Submission #136820

#	Time	Username	Problem	Language	Result	Execution time	Memory
136820		hamzqq9	Coin Collecting (JOI19_ho_t4)	C++14	0 / 100	2 ms	376 KiB

joi2019_ho_t4

#include<bits/stdc++.h>
#define st first
#define nd second
#define pb push_back
#define ppb pop_back
#define ii pair<int,int>
#define ll long long
#define umin(x,y) x=min(x,y)
#define umax(x,y) x=max(x,y)
#define orta ((bas+son)>>1)
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
#define inf 2000000000
#define N 100005
#define MOD 998244353
using namespace std;

ll ans;
int n;
int a[3][N],no[3][N];

void solve() {

//	cerr << ans << "\n";

	multiset<int> s[3];

	for(int i=1;i<=2;i++) {

		for(int j=1;j<=n;j++) {

			if(a[i][j]) no[i][j]=1;

			for(int k=1;k<=a[i][j]-1;k++) s[i].insert(j);

		}

	}

	for(int j=1;j<=n;j++) {

		bool ok[3]={0};

		for(int i=1;i<=2;i++) {

			if(no[i][j]) {

				ok[i]=1;

				continue ;

			}

			vector<ii> cd;

			auto pos=s[i].lower_bound(j);

			if(pos!=s[i].end()) cd.pb({abs(j-*pos),*pos});

			if(pos!=s[i].begin()) {

				pos=prev(pos);

				cd.pb({abs(j-*pos),*pos});

			}

			if(!sz(cd)) continue ;

			sort(all(cd));

			ans+=cd[0].st;

			s[i].erase(s[i].find(cd[0].nd));

			ok[i]=1;

		}

		for(int i=1;i<=2;i++) {

			if(ok[i]) continue ;

			vector<ii> cd;

			auto pos=s[3-i].lower_bound(j);

			if(pos!=s[3-i].end()) cd.pb({abs(j-*pos)+1,*pos});

			if(pos!=s[3-i].begin()) {

				pos=prev(pos);

				cd.pb({abs(j-*pos)+1,*pos});

			}

			sort(all(cd));

			ans+=cd[0].st;

			s[3-i].erase(s[3-i].find(cd[0].nd));

			ok[i]=1;

		}

	}

}

int dst(ii a,ii b) {

	return abs(a.st-b.st)+abs(a.nd-b.nd);

}

ii fnear(int x,int y) {

	ii res;

	if(y>=2) res.nd=2;
	else res.nd=1;

	if(x>n) res.st=n;
	else if(x<1) res.st=1;
	else res.st=x;

	ans+=dst({x,y},res);

	return res;

}

int main() {

	scanf("%d",&n);

	for(int i=1;i<=n*2;i++) {

		int x,y;

		scanf("%d %d",&x,&y);

		ii near=fnear(x,y);

		a[near.nd][near.st]++;

	}

//	for(int i=1;i<=2;i++,cerr<<"\n") for(int j=1;j<=n;j++) cerr<<a[i][j]<<" ";

	solve();

	printf("%lld",ans);

}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:137:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
joi2019_ho_t4.cpp:143:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&x,&y);
   ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63