[Codeforces] 1614B. Divan and a New Project 풀이
Problem
1614B. Divan and a New Project
Approach
\(headquarters\) 의 좌표 \(x_0\)을 \(0\)으로 두고,
많이 방문해야하는 건물일수록 \(+1, -1, +2, -2 \cdots\) 이런 식으로 \(headquarters\)에 가깝게 지으면 된다. \((Greedy)\)
Code
/**
* written: 2021. 11. 26. Fri. 20:42:25 [UTC+9]
* jooncco의 mac에서.
**/
#include <bits/stdc++.h>
using namespace std;
#define FAST_IO ios_base::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
typedef pair<int,int> ii;
typedef deque<int> di;
typedef deque<ii> dii;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<ii> vii;
typedef priority_queue<int, vi, less<int> > maxHeap;
typedef priority_queue<int, vi, greater<int> > minHeap;
int n,a;
void solve() {
cin >> n;
vii arr(n);
for (int i=0; i < n; ++i) {
cin >> a;
arr[i]= {a,i}; // { 방문횟수, index } 저장
}
sort(arr.begin(),arr.end());
int x0= 0;
ll curX= 1, ansDis= 0;
vl ans(n,1e9);
// 많이 방문할 빌딩부터 가깝게 좌표를 배정
for (int i=n-1; i >= 0; --i) {
int visitCnt= arr[i].first;
int origIdx= arr[i].second;
ans[origIdx]= curX;
ansDis += abs(curX)*2*visitCnt;
if (curX > 0) curX= -curX;
else curX= -curX+1;
}
cout << ansDis << "\n";
cout << 0; // 본사
for (int i=0; i < n; ++i) cout << " " << ans[i]; // 나머지
cout << "\n";
}
int main() {
FAST_IO;
int t; cin >> t;
while (t--) solve();
}
Complexity
- Time: \(O(n{\log}n)\)
- Space: \(O(n)\)
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