Submission #1037795

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037795		Halym2007	Palembang Bridges (APIO15_bridge)	C++17	9 / 100	2096 ms	2648 KiB

bridge

#include "bits/stdc++.h"
#define ll long long int
#define pb push_back
#define pii pair<int,int>
#define ff first
#define ss second
#define sz size()

const int N = 2e5 + 1;

using namespace std;

int n, k, a[N], b[N];

ll ans, p[N];

char s[N], d[N];

vector <ll> v;

int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    cin >> k >> n;
    v.pb(0);
    for(int i = 1; i <= n; i++){
    	cin >> s[i] >> a[i] >> d[i] >> b[i];
    	if(s[i] == d[i]) ans += abs(a[i] - b[i]);
    	else{
    		v.pb(a[i]);
    		v.pb(b[i]);
    	}
    }
    sort(v.begin(), v.end());
    int n1 = v.sz-1;
    for(int i = 1; i <= n1; i++) v[i] += v[i-1];
    ans += n1 / 2;
    ll mn = 1e15;
  	if (n1 == 0) mn = 0;
    if(k == 1){
    	for(int i = 1; i <= n1; i++){
    		int nd = v[i] - v[i-1];
    		ll san = (i*nd)-v[i] + (v.back() - v[i-1]) - ((n1-i+1)*nd);
    		mn = min(mn,san);
    	}
    	cout << ans + mn << '\n';
    }
    else{
    	for(int i = 1; i <= n1; i++){
    		for(int j = i+1; j <= n1; j++){
    			int nd = v[i] - v[i-1], nd1 = v[j] - v[j-1];
    			ll san = 0;
    			for(int u = 1; u <= n; u++){
    				if(s[u] == d[u]) continue;
    				san += min(abs(a[u]-nd)+abs(b[u]-nd),abs(a[u]-nd1)+abs(b[u]-nd1));
    			}
    			mn = min(mn,san);
    		}
    	}
    	cout << ans + mn << '\n';
    }
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 9 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37