답안 #99543

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
99543 2019-03-05T00:45:27 Z jhnah917 전봇대 (KOI13_pole) C++14
100 / 100
41 ms 2200 KB
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

int n;
vector<ll> v;

ll f(ll x){
	ll ret = 0;
	for(ll i=0; i<n; i++){
		ret += abs(v[i] - (i*x));
	}
	return ret;
}

int main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> n; v.resize(n);
	for(int i=0; i<n; i++) cin >> v[i];
	ll s = 0, e = 1e9;
	while(s+3 <= e){
		ll t1 = (s+s+e)/3;
		ll t2 = (s+e+e)/3;
		if(f(t1) > f(t2)) s = t1;
		else e = t2;
	}
	ll ans = s, mini = f(s);
	for(int i=s; i<=e; i++){
		ll now = f(i);
		if(now < mini){
			ans = i; mini = now;
		}
	}
	cout << mini;
}

Compilation message

pole.cpp: In function 'int main()':
pole.cpp:28:5: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
  ll ans = s, mini = f(s);
     ^~~
# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 512 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 256 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 412 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 3 ms 384 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 6 ms 512 KB Output is correct
5 Correct 7 ms 512 KB Output is correct
6 Correct 6 ms 512 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 41 ms 2080 KB Output is correct
2 Correct 27 ms 2200 KB Output is correct
3 Correct 29 ms 2176 KB Output is correct
4 Correct 41 ms 2048 KB Output is correct
5 Correct 26 ms 2176 KB Output is correct
6 Correct 29 ms 2048 KB Output is correct