Submission #136845

#	Time	Username	Problem	Language	Result	Execution time	Memory
136845		hamzqq9	Coin Collecting (JOI19_ho_t4)	C++14	0 / 100	2 ms	380 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];
int tot[4];

void solve() {

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

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

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

			a[0][j]+=a[i][j];
			tot[i]+=a[i][j];

		}

	}

	ans+=abs(tot[1]-tot[2])/2;

	multiset<int> unvis,spread;

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

		if(a[0][i]<2) {

			while(sz(spread) && a[0][i]<2) {

				a[0][i]++;

				ans+=i-*spread.begin();

				spread.erase(spread.begin());

			}

		}
		else {

			while(min(a[0][i]-2,sz(unvis))) {

				ans+=i-*unvis.begin();

				a[0][i]--;

				unvis.erase(unvis.begin());

			}

		}

		for(int j=a[0][i];j<2;j++) {

			unvis.insert(i);

		}

		for(int j=2;j<a[0][i];j++) {

			spread.insert(i);

		}

	}

}

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:112:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
joi2019_ho_t4.cpp:118:8: 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