#include<bits/stdc++.h>
#define f first
#define s second
#define int long long
#define pii pair<int,int>
using namespace std;
const int N = 2e5 + 5, mod = 1e9 + 7; // !
int t,n,a[N];
map<int,int> id;
set<int> s;
vector<int> x, v[N];
main(){
cin >> n;
for(int i = 1; i <= n; i++) {
cin >> a[i];
x.push_back(a[i]);
}
sort(x.begin(),x.end());
int ans = 0, idx = 0;
for(int i = 0; i < n; i++) {
if(!i || x[i] != x[i - 1]) idx++;
id[x[i]] = idx;
}
for(int i = 1; i <= n; i++) v[id[a[i]]].push_back(i);
for(int i = 1; i <= idx; i++) {
if(!(i == 1 && !x[0])) {
for(int j = 1; j < v[i].size(); j++) {
int prev = v[i][j - 1], cur = v[i][j];
if(s.upper_bound(prev) != s.end()) {
if(*s.upper_bound(prev) < cur) ans++;
}
}
ans++;
}
for(int j = 0; j < v[i].size(); j++) s.insert(v[i][j]);
}
cout << ans;
}
Compilation message
Main.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
12 | main(){
| ^~~~
Main.cpp: In function 'int main()':
Main.cpp:27:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
27 | for(int j = 1; j < v[i].size(); j++) {
| ~~^~~~~~~~~~~~~
Main.cpp:35:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
35 | for(int j = 0; j < v[i].size(); j++) s.insert(v[i][j]);
| ~~^~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5068 KB |
Output is correct |
| 4 |
Correct |
30 ms |
8696 KB |
Output is correct |
| 5 |
Correct |
44 ms |
10424 KB |
Output is correct |
| 6 |
Correct |
111 ms |
15924 KB |
Output is correct |
| 7 |
Correct |
102 ms |
20708 KB |
Output is correct |
