Submission #279837

#	Time	Username	Problem	Language	Result	Execution time	Memory
279837		dorijanlendvaj	Pairs (IOI07_pairs)	C++14	0 / 100	4 ms	384 KiB

pairs

//DUEL
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define x first
#define y second
#define pii pair<int,int>
#define pb push_back
#define eb emplace_back
#define shandom_ruffle(a, b) shuffle(a, b, rng)
#define vi vector<int>
#define vl vector<ll>
#define popcnt __builtin_popcount
#define popcntll __builtin_popcountll
#define all(a) begin(a),end(a)

using namespace std;
using namespace __gnu_pbds;

using ll=long long;
using ull=unsigned long long;
using ld=long double;
int MOD=1000000007;
int MOD2=998244353;
vector<int> bases;
const ll LLINF=1ll<<60;
const char en='\n';

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void yes() {cout<<"YES"<<en; exit(0);}
void no() {cout<<"NO"<<en; exit(0);}
inline int rund() {int x576363482791fuweh=rng();return abs(x576363482791fuweh)%RAND_MAX;}
template<class T>
void prVec(vector<T> w,bool fl=false)
{
	cout<<w.size()<<en;
	for (int i=0;i<int(w.size())-1;++i) cout<<w[i]<<' ';
	if (w.size()) cout<<w[w.size()-1]<<en;
	if (fl) cout<<flush;
}

void M998()
{
	swap(MOD,MOD2);
}

ll raand()
{
	ll a=rund();
	a*=RAND_MAX;
	a+=rund();
    return a;
}

#define rand raand

ll raaand()
{
	return raand()*(MOD-7)+raand();
}

void compress(vi&v)
{
	set<int> s;
	for (auto a: v) s.insert(a);
	vi o(all(s));
	for (auto&a: v) a=lower_bound(all(o),a)-o.begin();
}

void compress(vl&v)
{
	set<ll> s;
	for (auto a: v) s.insert(a);
	vl o(all(s));
	for (auto&a: v) a=lower_bound(all(o),a)-o.begin();
}

string to_upper(string a)
{
	for (int i=0;i<(int)a.size();++i) if (a[i]>='a' && a[i]<='z') a[i]-='a'-'A';
	return a;
}

string to_lower(string a)
{
	for (int i=0;i<(int)a.size();++i) if (a[i]>='A' && a[i]<='Z') a[i]+='a'-'A';
	return a;
}

ll sti(string a,int base=10)
{
	ll k=0;
	for (int i=0;i<(int)a.size();++i)
	{
		k*=base;
		k+=a[i]-'0';
	}
	return k;
}

template<class T>
void eras(vector<T>& a,T b)
{
	a.erase(find(a.begin(),a.end(),b));
}

string its(ll k,int base=10)
{
	if (k==0) return "0";
	string a;
	while (k)
	{
		a.push_back((k%base)+'0');
		k/=base;
	}
	reverse(a.begin(),a.end());
	return a;
}

ll min(ll a,int b)
{
	if (a<b) return a;
	return b;
}

ll min(int a,ll b)
{
	if (a<b) return a;
	return b;
}

ll max(ll a,int b)
{
	if (a>b) return a;
	return b;
}

ll max(int a,ll b)
{
	if (a>b) return a;
	return b;
}

ll gcd(ll a,ll b)
{
	if (b==0) return a;
	return gcd(b,a%b);
}

ll lcm(ll a,ll b)
{
	return a/gcd(a,b)*b;
}

template<class T,class K>
pair<T,K> mp(T a,K b)
{
	return make_pair(a,b);
}

inline int mult(ll a,ll b)
{
	return (a*b)%MOD;
}

inline int pot(int n,int k)
{
	if (k==0) return 1;
	ll a=pot(n,k/2);
	a=mult(a,a);
	if (k%2) return mult(a,n);
	else return a;
}

int divide(int a,int b)
{
	return mult(a,pot(b,MOD-2));
}

inline int sub(int a,int b)
{
	if (a-b>=0) return a-b;
	return a-b+MOD;
}

inline int add(int a,int b)
{
	if (a+b>=MOD) return a+b-MOD;
	return a+b;
}

bool prime(ll a)
{
	if (a==1) return 0;
	for (int i=2;i<=round(sqrt(a));++i)
	{
		if (a%i==0) return 0;
	}
	return 1;
}

const int N=300010,MMM=1<<18,SI=230;
int b,n,d,ooooooooof,sss[MMM*2+10],fen[SI][SI];
int cnr[SI][SI][SI],cna[SI][SI][SI],cn2[SI][SI][SI];

void upd(int j,int i,int x)
{
	//cout<<j<<' '<<i<<' '<<x<<endl;
	for (++i;i<SI;i+=i&-i) fen[j][i]+=x;
}

int ge1(int j,int r)
{
	int an=0;
	//cout<<j<<' '<<r<<endl;
	for (;r;r-=r&-r) an+=fen[j][r];
	return an;
}

int ge2(int j,int l,int r)
{
	r=min(r,SI-2);
	l=max(l,0);
	return ge1(j,r+1)-ge1(j,l);
}

void solve3()
{
	const int MM=225;
	vector<vector<pair<int,pii>>> im(MM+5);
	vector<vector<pii>> pos(MM+5);
	for (int i=0;i<n;++i)
	{
		int x,y,z;
		cin>>x>>y>>z;
		int a=x+y+z,b=x+y-z+75,c=x-y+z+75,d1=x-y-z+150;
		im[a].pb({b,{c,d1}});
		pos[b].pb({c,d1});
		if (b+d+1<=MM) pos[b+d+1].pb({c,d1});
		if (b-d-1>=0) pos[b-d-1].pb({c,d1});
		//cout<<a<<' '<<b<<' '<<c<<' '<<d1<<en;
	}
	for (int i=0;i<=MM;++i)
	{
		sort(all(pos[i]));
		pos[i].erase(unique(all(pos[i])),pos[i].end());
	}
	ll an=0;
	for (int i=0;i<=MM;++i)
	{
		memset(fen,0,sizeof(fen));
		for (int j=0;j<=MM;++j)
		{
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				cn2[j][k][l]=0;
			}
		}
		sort(all(im[i]));
		for (auto a: im[i])
		{
			++cna[a.x][a.y.x][a.y.y];
			++cn2[a.x][a.y.x][a.y.y];
			//cout<<"U"<<a.x+d+1<<' '<<MM<<endl;
			if (a.x+d+1<=MM) ++cnr[a.x+d+1][a.y.x][a.y.y];
		}
		if (i>d)
		{
			for (auto a: im[i-d-1])
			{
				--cna[a.x][a.y.x][a.y.y];
				if (a.x+d+1<=MM) --cnr[a.x+d+1][a.y.x][a.y.y];
			}
		}
		for (int j=0;j<=MM;++j)
		{
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				if (cnr[j][k][l])
				{
					upd(k,l,-cnr[j][k][l]);
				}
			}
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				if (cna[j][k][l]-cn2[j][k][l]) upd(k,l,cna[j][k][l]-cn2[j][k][l]);
			}
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				if (cn2[j][k][l])
				{
					int an2=0;
					for (int k1=max(0,k-d);k1<=min(MM,k+d);++k1)
					{
						//an2+=ge2(k1,l-d,l+d);
						an+=ge2(k1,l-d,l+d)*1ll*cn2[j][k][l];
					}
					//cout<<i<<' '<<j<<' '<<k<<' '<<l<<' '<<an2<<endl;
					upd(k,l,cn2[j][k][l]);
					an+=cn2[j][k][l]*1ll*(cn2[j][k][l]-1)/2;
				}
				//if (cna[j][k][l]) upd(k,l,cna[j][k][l]);
			}
		}
		continue;
	}
	//cout<<"BREAK "<<an<<endl;
	memset(cna,0,sizeof(cna));
	memset(cnr,0,sizeof(cnr));
	for (int i=0;i<=MM;++i)
	{
		memset(fen,0,sizeof(fen));
		for (int j=0;j<=MM;++j)
		{
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				cn2[j][k][l]=0;
			}
		}
		sort(all(im[i]));
		if (i>d)
		{
			for (auto a: im[i-d-1])
			{
				--cna[a.x][a.y.x][a.y.y];
				if (a.x-d-1>=0) --cnr[a.x-d-1][a.y.x][a.y.y];
			}
		}
		for (auto a: im[i]) ++cn2[a.x][a.y.x][a.y.y];
		for (int j=MM;j>=0;--j)
		{
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				if (cnr[j][k][l])
				{
					upd(k,l,-cnr[j][k][l]);
				}
			}
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				if (cn2[j][k][l])
				{
					int an2=0;
					for (int k1=max(0,k-d);k1<=min(MM,k+d);++k1)
					{
						//an2+=ge2(k1,l-d,l+d);
						an+=ge2(k1,l-d,l+d)*1ll*cn2[j][k][l];
					}
					//cout<<i<<' '<<j<<' '<<k<<' '<<l<<' '<<an2<<endl;
				}
			}
			for (auto a: pos[j])
			{
				int k=a.x,l=a.y;
				if (cna[j][k][l]) upd(k,l,cna[j][k][l]);
			}
		}
		for (auto a: im[i])
		{
			++cna[a.x][a.y.x][a.y.y];
			if (a.x-d-1>=0) ++cnr[a.x-d-1][a.y.x][a.y.y];
		}
	}
	cout<<an<<en;
}

void uuu(int i,int x)
{
	for (i+=MMM;i;i/=2) sss[i]+=x;
}

int ggg(int l,int r,int lo=0,int hi=MMM,int i=1)
{
	if (lo>=l && hi<=r) return sss[i];
	if (lo>=r || hi<=l) return 0;
	int mid=(lo+hi)/2;
	return ggg(l,r,lo,mid,i*2)+ggg(l,r,mid,hi,i*2+1);
}

void solve2()
{
	const int MM=75000;
	vector<vi> im(MM*2+10);
	for (int i=0;i<n;++i)
	{
		int x,y;
		cin>>x>>y;
		int x1=x-y+MM,y1=x+y;
		im[x1].pb(y1);
	}
	ll an=0;
	for (int i=0;i<=MM*2;++i)
	{
		if (i>=d+1) for (auto a: im[i-d-1]) uuu(a,-1);
		for (auto a: im[i])
		{
			an+=ggg(a-d,a+d+1);
			uuu(a,1);
		}
	}
	cout<<an<<en;
}

void solve1()
{
	vi v(n);
	for (auto&a: v) cin>>a;
	sort(all(v));
	int l=0;
	ll an=0;
	for (int i=1;i<n;++i)
	{
		while (v[i]-v[l]>d) ++l;
		an+=i-l;
	}
	cout<<an<<en;
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	for (int i=0;i<10;++i) bases.push_back(rand()%(MOD-13893829*2)[phone]);
	freopen("tc.txt","r",stdin);
	cin>>b>>n>>d>>ooooooooof;
	if (b==1) solve1();
	if (b==2) solve2();
	if (b==3) solve3();
}

Compilation message (stderr)

pairs.cpp: In function 'void solve3()':
pairs.cpp:296:10: warning: unused variable 'an2' [-Wunused-variable]
  296 |      int an2=0;
      |          ^~~
pairs.cpp:350:10: warning: unused variable 'an2' [-Wunused-variable]
  350 |      int an2=0;
      |          ^~~
pairs.cpp: In function 'int main()':
pairs.cpp:431:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  431 |  freopen("tc.txt","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~

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