Submission #170578

#	Time	Username	Problem	Language	Result	Execution time	Memory
170578		VEGAnn	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	2 ms	632 KiB

bridge

#include <bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define pii pair<int, int>
#define ft first
#define sd second
#define MP make_pair
#define PB push_back
#define sz(x) ((int)x.size())
using namespace std;
typedef long long ll;
const ll PW = 43;
const int N = 30010;
const int B = 100;
const int oo = 2e9;
const ll OO = 1e18;
vector<pii> seg;
vector<int> pts;
ll extra = 0, best = OO;
int k, n;

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//    freopen("in.txt","r",stdin);
    cin >> k >> n;
    assert(k == 1);
    for (int i = 0; i < n; i++){
        char c1, c2; int l, r;
        cin >> c1 >> l >> c2 >> r;
        if (l > r) swap(l, r);
        extra += r - l;
        if (c1 != c2){
            seg.PB(MP(l, r));
            pts.PB(l);
            if (l > 0)
                pts.PB(l - 1);
            if (r > 0)
                pts.PB(r - 1);
            pts.PB(r);
            if (l < int(1e9))
                pts.PB(l + 1);
            if (r < int(1e9))
                pts.PB(r + 1);
        }
    }
    sort(all(pts));
    pts.resize(unique(all(pts)) - pts.begin());
    for (int x : pts){
        ll cur = 0;
        for (pii cr : seg){
            if (cr.sd < x)
                cur += x - cr.sd;
            if (cr.ft > x)
                cur += cr.ft - x;
        }
        best = min(best, cur + cur);
    }
    cout << best + extra + sz(seg);
    return 0;
}

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