oj.uz

Submission #582097

# Submission time Handle Problem Language Result Execution time Memory
582097 2022-06-23T11:26:39 Z amunduzbaev Boarding Passes (BOI22_passes) C++17
0 / 100
 0 ms 212 KB 
#include "bits/stdc++.h"
using namespace std;
 
#define ar array
typedef int64_t ll;
#define int ll

const int N = 1e5 + 5;
int pref[N], suff[N];

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	//~ string s; cin>>s;
	//~ int n = s.size();
	int n; cin>>n;
	for(int i=0;i<n;i++){
		if(i) pref[i] += pref[i-1];
		pref[i] += i;
	}
	
	for(int i=n-1;~i;i--){
		suff[i] += suff[i+1];
		suff[i] += (n - i - 1);
	}
	
	int res = pref[n-1];
	for(int i=1;i<n;i++){
		res = min(res, pref[i-1] + suff[i]);
	}
	
	double rr = res / 2.;
	cout<<fixed<<setprecision(1)<<rr<<"\n";
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -