#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair<int,int> pii;
typedef vector<long long> vl;
typedef vector<int> vi;
int tree_levo[4 * 100100], tree_desno[4 * 100100];
void update_levo(int node, int l, int r, int pos){
if(l == r){
tree_levo[node]=1;
}
else{
int mid = (l + r) / 2;
if(pos <= mid) update_levo(node*2, l, mid, pos);
else update_levo(node*2+1, mid+1, r, pos);
tree_levo[node] = tree_levo[node*2] + tree_levo[node*2+1];
}
}
void update_desno(int node, int l, int r, int pos){
if(l == r){
tree_desno[node]=1;
}
else{
int mid = (l + r) / 2;
if(pos <= mid) update_desno(node*2, l, mid, pos);
else update_desno(node*2+1, mid+1, r, pos);
tree_desno[node] = tree_desno[node*2] + tree_desno[node*2+1];
}
}
int query_levo(int node, int l, int r, int L, int R){
if(r < L || l > R) return 0;
if(L <= l && r <= R) return tree_levo[node];
int mid = (l + r) / 2;
return query_levo(node*2, l, mid, L, R) + query_levo(node*2+1, mid+1, r, L, R);
}
int query_desno(int node, int l, int r, int L, int R){
if(r < L || l > R) return 0;
if(L <= l && r <= R) return tree_desno[node];
int mid = (l + r) / 2;
return query_desno(node*2, l, mid, L, R) + query_desno(node*2+1, mid+1, r, L, R);
}
void answer(int levo, int desno){
if(levo < desno)
cout<<"<"<<'\n';
else if(levo > desno)
cout<<">"<<'\n';
else
cout<<"?"<<'\n';
}
int main(){
int n;
cin>>n;
int levo = 0, desno = 0, cnt_levo = 0, cnt_desno = 0;
memset(tree_levo, 0, sizeof tree_levo);
memset(tree_desno, 0, sizeof tree_desno);
for(int i = 0; i < n; i++){
int id, side;
cin>>id>>side;
if(side == 1){
levo += query_desno(1, 1, n, 1, id-1);
update_levo(1, 1, n, id);
cnt_levo++;
if(cnt_desno == 0)
cout<<">"<<'\n';
else
answer(levo, desno);
}
else{
desno += query_levo(1, 1, n, 1, id-1);
update_desno(1, 1, n, id);
cnt_desno++;
if(cnt_levo == 0)
cout<<"<"<<'\n';
else
answer(levo,desno);
}
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
3412 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
