oj.uz

답안 #439718

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
439718 2021-06-30T16:09:47 Z kig9981 Road Construction (JOI21_road_construction) C++17
33 / 100
 5908 ms 40860 KB 
#include <bits/stdc++.h>

#ifdef NON_SUBMIT
#define TEST(n) (n)
#define tout cerr
#else
#define TEST(n) ((void)0)
#define tout cin
#endif

using namespace std;

const int SZ=1<<18;
vector<int> P[250000];
vector<pair<int,int>> U[250000];
vector<long long> ans, x, y;
int tree[2*SZ];
long long X[250000], Y[250000];

void update(int n, int v)
{
	for(;n<=250000;n+=n&-n) tree[n]+=v;
}

int get_cnt(int n)
{
	int ret=0;
	for(;n;n-=n&-n) ret+=tree[n];
	return ret;
}

long long solve(long long K)
{
	int j=0;
	long long ret=0;
	memset(tree,0,sizeof(tree));
	for(int i=0;i<x.size();i++) {
		for(;x[j]+K<x[i];j++) for(auto[u,k]: U[j]) update(u+1,-1);
		for(auto[u,k]: U[i]) update(u+1,1);
		for(auto[u,k]: U[i]) ret+=get_cnt(upper_bound(y.begin(),y.end(),y[u]+K)-y.begin())-get_cnt(lower_bound(y.begin(),y.end(),y[u]-K)-y.begin())-1;
	}
	return ret;
}

void add_tree(int n, int i)
{
	P[n].push_back(i);
	for(tree[n+=SZ]++;n>>=1;) tree[n]=tree[2*n]+tree[2*n+1];
}

void get_ans(int n1, int n2, int i, long long K, int bit=1, int s=0, int e=SZ-1)
{
	int m=(s+e)>>1;
	if(n2<n1 || n2<s || e<n1 || tree[bit]==0) return;
	if(s==e) {
		for(int j=0;j<P[m].size();j++) {
			while(j<P[m].size() && abs(X[P[m][j]]-X[i])+abs(Y[P[m][j]]-Y[i])>K) {
				swap(P[m][j],P[m].back());
				P[m].pop_back();
				tree[bit]--;
			}
			if(j<P[m].size() && i!=P[m][j]) ans.push_back(abs(X[P[m][j]]-X[i])+abs(Y[P[m][j]]-Y[i]));
		}
		return;
	}
	get_ans(n1,n2,i,K,2*bit,s,m);
	get_ans(n1,n2,i,K,2*bit+1,m+1,e);
	tree[bit]=tree[2*bit]+tree[2*bit+1];
}

long long solve2(long long K)
{
	long long ret=0;
	memset(tree,0,sizeof(tree));
	for(int i=0;i<x.size();i++) {
		for(auto[u,k]: U[i]) add_tree(u,k);
		for(auto[u,k]: U[i]) get_ans((lower_bound(y.begin(),y.end(),y[u]-K)-y.begin()),(upper_bound(y.begin(),y.end(),y[u]+K)-y.begin()-1),k,K);
	}
	return ret;
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(NULL); cout.tie(NULL);
	TEST(freopen("input.txt","r",stdin));
	TEST(freopen("output.txt","w",stdout));
	TEST(freopen("debug.txt","w",stderr));
	int N, K;
	long long s=0, e=4000000000LL;
	cin>>N>>K;
	for(int i=0;i<N;i++) {
		cin>>X[i]>>Y[i];
		x.push_back(X[i]+Y[i]);
		y.push_back(X[i]-Y[i]);
	}
	sort(x.begin(),x.end()); x.resize(unique(x.begin(),x.end())-x.begin());
	sort(y.begin(),y.end()); y.resize(unique(y.begin(),y.end())-y.begin());
	for(int i=0;i<N;i++) U[lower_bound(x.begin(),x.end(),X[i]+Y[i])-x.begin()].emplace_back(lower_bound(y.begin(),y.end(),X[i]-Y[i])-y.begin(),i);
	while(s<=e) {
		long long m=(s+e)>>1;
		if(solve(m)<K) s=m+1;
		else e=m-1;
	}
	solve2(e);
	sort(ans.begin(),ans.end());
	while(ans.size()<K) ans.push_back(s);
	for(auto a: ans) cout<<a<<'\n';
	return 0;
}

Compilation message

road_construction.cpp: In function 'long long int solve(long long int)':
road_construction.cpp:37:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for(int i=0;i<x.size();i++) {
      |              ~^~~~~~~~~
road_construction.cpp: In function 'void get_ans(int, int, int, long long int, int, int, int)':
road_construction.cpp:56:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |   for(int j=0;j<P[m].size();j++) {
      |               ~^~~~~~~~~~~~
road_construction.cpp:57:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |    while(j<P[m].size() && abs(X[P[m][j]]-X[i])+abs(Y[P[m][j]]-Y[i])>K) {
      |          ~^~~~~~~~~~~~
road_construction.cpp:62:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |    if(j<P[m].size() && i!=P[m][j]) ans.push_back(abs(X[P[m][j]]-X[i])+abs(Y[P[m][j]]-Y[i]));
      |       ~^~~~~~~~~~~~
road_construction.cpp: In function 'long long int solve2(long long int)':
road_construction.cpp:75:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |  for(int i=0;i<x.size();i++) {
      |              ~^~~~~~~~~
road_construction.cpp: In function 'int main()':
road_construction.cpp:107:18: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  107 |  while(ans.size()<K) ans.push_back(s);
      |        ~~~~~~~~~~^~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 85 ms 18836 KB Output is correct
2 Correct 84 ms 18804 KB Output is correct
3 Correct 93 ms 18864 KB Output is correct
4 Correct 87 ms 18936 KB Output is correct
5 Incorrect 73 ms 17684 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3149 ms 40768 KB Output is correct
2 Correct 2877 ms 40660 KB Output is correct
3 Correct 67 ms 18736 KB Output is correct
4 Correct 2952 ms 40528 KB Output is correct
5 Correct 2889 ms 40740 KB Output is correct
6 Correct 2978 ms 40860 KB Output is correct
7 Correct 2873 ms 40012 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5710 ms 37576 KB Output is correct
2 Correct 5908 ms 37504 KB Output is correct
3 Correct 12 ms 14028 KB Output is correct
4 Correct 2994 ms 37472 KB Output is correct
5 Correct 1925 ms 25012 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5710 ms 37576 KB Output is correct
2 Correct 5908 ms 37504 KB Output is correct
3 Correct 12 ms 14028 KB Output is correct
4 Correct 2994 ms 37472 KB Output is correct
5 Correct 1925 ms 25012 KB Output is correct
6 Correct 5457 ms 37568 KB Output is correct
7 Correct 5872 ms 37592 KB Output is correct
8 Correct 13 ms 14080 KB Output is correct
9 Correct 14 ms 14028 KB Output is correct
10 Correct 5406 ms 36332 KB Output is correct
11 Correct 3004 ms 37572 KB Output is correct
12 Correct 1976 ms 25012 KB Output is correct

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 85 ms 18836 KB Output is correct
2 Correct 84 ms 18804 KB Output is correct
3 Correct 93 ms 18864 KB Output is correct
4 Correct 87 ms 18936 KB Output is correct
5 Incorrect 73 ms 17684 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 85 ms 18836 KB Output is correct
2 Correct 84 ms 18804 KB Output is correct
3 Correct 93 ms 18864 KB Output is correct
4 Correct 87 ms 18936 KB Output is correct
5 Incorrect 73 ms 17684 KB Output isn't correct
6 Halted 0 ms 0 KB -