이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
using namespace std;
struct SegmentTree{
vector<int>segTree;
vector<int>lazy;
SegmentTree(int n){
segTree.resize(4 * n);
lazy.resize(4 * n);
}
void Propagate(int node, int l, int r){
if(!lazy[node])return;
if(l == r){
segTree[node] = lazy[node];
}
else{
lazy[node * 2] = lazy[node];
lazy[node * 2 + 1] = lazy[node];
}
lazy[node] = 0;
}
void Build(int node, int l, int r, vector<int>&v){
if(l == r){
segTree[node] = v[l];
}
else{
int mid = (l + r) >> 1;
Build(node * 2, l, mid, v);
Build(node * 2 + 1, mid + 1, r, v);
}
}
void Update(int node, int l, int r, int ql, int qr, int val){
Propagate(node, l, r);
if(ql <= l && r <= qr){
lazy[node] = val;
Propagate(node, l, r);
return;
}
if(ql > r || l > qr)return;
int mid = (l + r) >> 1;
Update(node * 2, l, mid, ql, qr, val);
Update(node * 2 + 1, mid + 1, r, ql, qr, val);
}
void Print(int node, int l, int r){
Propagate(node, l, r);
if(l == r){
cout << segTree[node] << "\n";
}
else{
int mid = (l + r) >> 1;
Print(node * 2, l, mid);
Print(node * 2 + 1, mid + 1, r);
}
}
int Query(int node, int l, int r, int pos){
Propagate(node, l, r);
if(l == r)return segTree[node];
int mid = (l + r) >> 1;
if(pos <= mid)return Query(node * 2, l, mid, pos);
else return Query(node * 2 + 1, mid + 1, r, pos);
}
};
int main()
{
int n;
cin >> n;
vector<int>stones(n + 1);
for(int i = 1;i <= n;++i){
cin >> stones[i];
}
SegmentTree tree(n);
tree.Build(1, 1, n, stones);
map<int, int>last;
for(int i = 1;i <= n;++i){
int cur = stones[i];
if(cur == tree.Query(1, 1, n, last[cur]))tree.Update(1, 1, n, last[cur], i, cur);
last[cur] = i;
}
tree.Print(1, 1, n);
}
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