Submission #536313

#	Time	Username	Problem	Language	Result	Execution time	Memory
536313		Tadiorn	Pinball (JOI14_pinball)	C++14	0 / 100	8 ms	19028 KiB

pinball

#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define pii pair<int,int>
#define pll pair<long long,long long>
#define INF 1000000000
#define LINF 1000000000000000000
#define pb push_back
#define MAXN 100010
using namespace std;
ll a[MAXN], b[MAXN], c[MAXN], d[MAXN];
set<ll> com;
map<ll, int> mapa;
ll dpl[MAXN], dpr[MAXN];
ll seg[12*MAXN][2];
void update(int node, int l, int r, int idx, ll x, int sg){
    if(l == r){
        seg[node][sg] = x;
        return;
    }
    int mid = (l+r)/2;
    if(idx <= mid) update(2*node, l, mid, idx, x, sg);
    else update(2*node+1, mid+1, r, idx, x, sg);
    seg[node][sg] = min(seg[2*node][sg], seg[2*node+1][sg]);
}
ll query(int node, int l, int r, int L, int R, int sg){
    if(L <= l && r <= R){
        return seg[node][sg];
    }
    int mid = (l+r)/2;
    ll res = LINF;
    if(L <= mid) res = min(res, query(2*node, l, mid, L, R, sg));
    if(R > mid) res = min(res, query(2*node+1, mid+1, r, L, R, sg));
    return res;
}


int main()
{
    for(int i = 0; i < 12*MAXN; i++){
        seg[i][0] = LINF;
        seg[i][1] = LINF;
    }
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int m, n;
    cin >> m >> n;
    for(int i = 1; i <= m; i++){
        cin >> a[i] >> b[i] >> c[i] >> d[i];
        com.insert(a[i]);com.insert(b[i]);com.insert(c[i]);
    }
    int br = 1;
    for(auto x : com){
        mapa[x] = br++;
    }
    bool ind = false;
    for(int i = 1; i <= m; i++){
        if(!ind && b[i] == n) n = mapa[b[i]];
        a[i] = mapa[a[i]]; b[i] = mapa[b[i]]; c[i] = mapa[c[i]];
    }
    for(int i = 1; i <= m; i++){
        if(a[i] == 1) dpl[i] = d[i];
        else{
            dpl[i] = LINF;
            dpl[i] = query(1, 1, n, a[i], b[i], 0) + d[i];
        }
        if(b[i] == n) dpr[i] = d[i];
        else{
            dpr[i] = LINF;
            dpr[i] = query(1, 1, n, a[i], b[i], 1) + d[i];
        }
        update(1, 1, n, c[i], dpl[i], 0);
        update(1, 1, n, c[i], dpr[i], 1);
    }
    /*for(int i = 1; i <= m; i++){
        cout << dpl[i] << ", ";
    } cout << endl;
    for(int i = 1; i <= m; i++){
        cout << dpr[i] << ", ";
    } cout << endl;*/
    ll res = LINF;
    for(int i = 1; i <= m; i++){
        res = min(res, dpl[i] + dpr[i] - d[i]);
    }
    if(res >= LINF) cout << -1 << endl;
    else cout << res << endl;

    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49