#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define int ll
using pii = pair<int, int>;
struct node{
int x, e;
};
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n; cin>>n;
vector<node> t(n + 1);
for (int i = 1; i <= n; i++){
cin>>t[i].x>>t[i].e;
}
auto cmp = [&](node a, node b){
return (a.e >= b.e);
};
sort(t.begin() + 1, t.end(), cmp);
vector<int> d(n + 1), s(n + 1);
for (int i = 1; i <= n; i++){
d[i] = t[i].e - t[i].x;
s[i] = t[i].e + t[i].x;
}
set<pii> s1, s2;
for (int i = 1; i <= n; i++){
s1.insert({d[i], i});
s2.insert({s[i], i});
}
int out = 0;
for (int i = 1; i <= n; i++){
if (s1.empty() || s1.find({d[i], i}) == s1.end()){
continue;
}
// xj <= xi and d[j] <= d[i]
// xj > xi and s[j] <= s[i]
vector<int> rem;
if (!s1.empty()){
auto it = s1.begin();
while (it != s1.end()){
auto [a, j] = *it;
if (a > d[i]) break;
if (t[j].x > t[i].x){
it++;
continue;
}
rem.push_back(j);
it++;
}
}
if (!s2.empty()){
auto it = s2.begin();
while (it != s2.end()){
auto [a, j] = *it;
if (a > s[i]) break;
if (t[j].x < t[i].x){
it++;
continue;
}
rem.push_back(j);
it++;
}
}
for (int j: rem){
if (!s1.empty()){
auto it = s1.find({d[j], j});
if (it != s1.end()) s1.erase(it);
}
if (!s2.empty()){
auto it = s2.find({s[j], j});
if (it != s2.end()) s2.erase(it);
}
}
out++;
}
cout<<out<<"\n";
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:46:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
46 | auto [a, j] = *it;
| ^
Main.cpp:59:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
59 | auto [a, j] = *it;
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Runtime error |
24 ms |
4524 KB |
Execution killed with signal 11 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
1 ms |
344 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
1 ms |
344 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
1 ms |
604 KB |
Output is correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Correct |
1 ms |
604 KB |
Output is correct |
23 |
Correct |
1 ms |
604 KB |
Output is correct |
24 |
Correct |
1 ms |
604 KB |
Output is correct |
25 |
Correct |
1 ms |
372 KB |
Output is correct |
26 |
Correct |
1 ms |
604 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Runtime error |
24 ms |
4524 KB |
Execution killed with signal 11 |
3 |
Halted |
0 ms |
0 KB |
- |