Submission #1152083

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152083		SmuggingSpun	Building Bridges (CEOI17_building)	C++20	30 / 100	1 ms	328 KiB

building

#include<bits/stdc++.h>
#define taskname "A"
using namespace std;
typedef long long ll;
const ll INF = 1e18;
template<class T>void minimize(T& a, T b){
	if(a > b){
		a = b;
	}
}
ll square(int x){
	return 1LL * x * x;
}
int n;
namespace sub1{
	void solve(){
		vector<int>h(n + 1), w(n + 1);
		for(int i = 1; i <= n; i++){
			cin >> h[i];
		}
		for(int i = 1; i <= n; i++){
			cin >> w[i];
		}
		vector<ll>dp(n + 1, INF);
		dp[1] = 0;
		for(int i = 2; i <= n; i++){
			ll sum = 0;
			for(int j = i - 1; j > 0; sum += w[j--]){
				minimize(dp[i], dp[j] + square(h[i] - h[j]) + sum);
			}
		}
		cout << dp[n];
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n;
	if(n <= 1000){
		sub1::solve();
	}
}

Compilation message (stderr)

building.cpp: In function 'int main()':
building.cpp:38:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40