Submission #721020

#	Time	Username	Problem	Language	Result	Execution time	Memory
721020		minhcool	Wiring (IOI17_wiring)	C++17	7 / 100	35 ms	5564 KiB

wiring

#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define fi first
#define se second
#define pb push_back
#define mp make_pair

typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;

const int N = 2e3 + 5;

const int oo = 1e9 + 7, mod = 1e9 + 7;

/*
New algo:
*/

ll n, m;

ll r[N], b[N];

ll dp[N][N];

ll pref[N][N], mini[N];

ll min_total_length(vector<int> R, vector<int> B){
	n = R.size(), m = B.size();
	for(int i = 0; i < n; i++) r[i + 1] = R[i];
	for(int i = 0; i < m; i++) b[i + 1] = B[i];
	for(int i = 0; i <= n; i++){
		for(int j = 0; j <= m; j++) dp[i][j] = oo;
	}
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= m; j++) pref[i][j] = pref[i][j - 1] + abs(r[i] - b[j]);
		mini[i] = oo;
		for(int j = 1; j <= m; j++) mini[i] = min(mini[i], abs(r[i] - b[j]));
	}
	//cout << pref[1][1] << "\n";
	dp[0][0] = 0;
	for(int i = 0; i <= n; i++){
		for(int j = 0; j <= m; j++){
			for(int nxt = j + 1; nxt <= m; nxt++){
				dp[i + 1][nxt] = min(dp[i + 1][nxt], dp[i][j] + pref[i + 1][nxt] - pref[i + 1][j]);
			}
			dp[i + 1][j] = min(dp[i + 1][j], dp[i][j] + mini[i + 1]);
			//cout << i << " " << j << " " << dp[i][j] << "\n";
		}
	}
	return dp[n][m];
}

/*
void process(){
	int n, m;
	cin >> n >> m;
	vector<int> v1, v2;
	for(int i = 0; i < n; i++){
		int x;
		cin >> x;
		v1.pb(x);
	}
	for(int i = 0; i < m; i++){
		int x;
		cin >> x;
		v2.pb(x);
	}
	cout << min_total_length(v1, v2);
}

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	process();
}
*/

• Subtask 1: 7 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45