oj.uz

Submission #1039982

# Submission time Handle Problem Language Result Execution time Memory
1039982 2024-07-31T13:22:31 Z underwaterkillerwhale Fuel Station (NOI20_fuelstation) C++17
13 / 100
 126 ms 31564 KB 
#include <bits/stdc++.h>
#define se              second
#define fs              first
#define mp              make_pair
#define pb              push_back
#define ll              long long
#define ii              pair<ll,ll>
#define ld              long double
#define SZ(v)           (int)v.size()
#define ALL(v)          v.begin(), v.end()
#define bit(msk, i)     ((msk >> i) & 1)
#define iter(id, v)     for(auto id : v)
#define rep(i,m,n)      for(int i=(m); i<=(n); i++)
#define reb(i,m,n)      for(int i=(m); i>=(n); i--)
using namespace std;

mt19937_64 rd(chrono :: steady_clock :: now().time_since_epoch().count());
ll Rand(ll l, ll r) { return uniform_int_distribution<ll> (l, r)(rd); }

const int N =3e5 + 7;
const int Mod = 1e9 + 7;
const int szBL = 240;
const int INF = 2e9;
const int BASE = 137;

struct Segment_Tree {
    struct Node {
        ll sum, pre;
    };
    int m;
    Node st[N << 2];

    void init (int n) {
        m = n;
    }

    Node mer (Node lf, Node rt) {
        Node cur;
        cur.pre = min(lf.pre, lf.sum + rt.pre);
        cur.sum = lf.sum + rt.sum;
        return cur;
    }

    void update (int id, int l, int r, int pos, ll val) {
        if (l > pos || r < pos) return;
        if (l == r) {
            st[id].sum += val;
            st[id].pre = min (0LL, st[id].sum);
            return;
        }
        int mid = l + r >> 1;
        update (id << 1, l, mid, pos, val);
        update (id << 1 | 1, mid + 1, r, pos, val);
        st[id] = mer(st[id << 1], st[id << 1 | 1]);
//        cout << l <<" "<<r<<" "<<st[id].mn <<" "<<pos<<" "<<val<<"\n";
    }
    void update (int pos, ll val) {
        update (1, 1, m, pos, val);
    }
    Node get (int id, int l, int r, int u, int v) {
        if (l > v || r < u) return {0, 0};
        if (l >= u && r <= v) {
            return st[id];
        }
        int mid = l + r >> 1;
//        cout << l <<" "<<r<<" "<<mer(get (id << 1, l, mid, u, v), get (id << 1 | 1, mid + 1, r, u, v)).pre <<"\n";
        return mer(get (id << 1, l, mid, u, v), get (id << 1 | 1, mid + 1, r, u, v));
//        st[id] = mer(st[id << 1], st[id << 1 | 1]);
//        cout << l <<" "<<r<<" "<<st[id].mn <<" "<<pos<<" "<<val<<"\n";
    }

}ST;

struct Data {
    int X, a, b, id;
};

struct Data2 {
    int X, a, id;
};

int n, m, K, D;
Data a[N];
vector<Data2> events[N];
int cnt[N];

void solution () {
    cin >> n >> D;
    rep (i, 1, n) {
        cin >> a[i].X >> a[i].a >> a[i].b;
    }
    sort (a + 1, a + 1 + n, [] (Data A, Data B) { return A.X < B.X; });
    vector<int> valx;
    rep (i, 1, n) valx.push_back(a[i].X);
    sort (ALL(valx));
    valx.resize(K = unique(ALL(valx)) - valx.begin());
    rep (i, 1, n) a[i].id = lower_bound(ALL(valx), a[i].X) - valx.begin() + 1;
    vector<int> vals = {0};
    rep (i, 1, n) {
        vals.push_back(a[i].b);
    }
    sort (ALL(vals));
    vals.resize(m = unique(ALL(vals)) - vals.begin());
    ST.init(K + 1);
    ST.update(K + 1, -D);
    rep (i, 1, n) {
        a[i].b = lower_bound(ALL(vals), a[i].b) - vals.begin();
        events[a[i].b].push_back({a[i].X, a[i].a, a[i].id});
        if (cnt[a[i].id] == 0) {
            ST.update (a[i].id, -a[i].X);
            ST.update (a[i].id + 1, a[i].X);
        }
        cnt[a[i].id]++;
        ST.update (a[i].id + 1, a[i].a);
//        cout << a[i].id<<" "<<-a[i].X<<"\n";
//        cout << a[i].id + 1<<" "<<a[i].X<<"\n";
//        cout << a[i].id + 1<<" "<<a[i].a<<"\n";
    }
//    cout << K<<"\n";
    ll res = INF;
    rep (i, 1, m - 1) {
        if (-ST.st[1].pre <= vals[i])
        res = min(res, -ST.st[1].pre);
//        cout << vals[i]<<":"<<ST.st[1].pre <<" aaa\n";
        iter (&id, events[i]) {
            ST.update(id.id + 1, -id.a);
            --cnt[id.id];
            if (cnt[id.id] == 0) {
                ST.update (id.id, id.X);
                ST.update (id.id + 1, -id.X);
            }
        }
    }
    cout << res <<"\n";
}

#define file(name) freopen(name".inp", "r", stdin); \
freopen(name".out", "w", stdout);
/*
*/
int main () {
//    file("c");
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    ll num_Test = 1;
//    cin >> num_Test;
    while(num_Test--)
        solution();
}
/*
no bug challenge +2
more insight about dp0/1
*/

Compilation message

FuelStation.cpp: In member function 'void Segment_Tree::update(int, int, int, int, long long int)':
FuelStation.cpp:51:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   51 |         int mid = l + r >> 1;
      |                   ~~^~~
FuelStation.cpp: In member function 'Segment_Tree::Node Segment_Tree::get(int, int, int, int, int)':
FuelStation.cpp:65:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |         int mid = l + r >> 1;
      |                   ~~^~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 KB Output is correct
2 Incorrect 3 ms 7516 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 115 ms 31000 KB Output is correct
2 Correct 117 ms 31048 KB Output is correct
3 Correct 116 ms 30960 KB Output is correct
4 Correct 93 ms 30540 KB Output is correct
5 Correct 95 ms 31008 KB Output is correct
6 Correct 113 ms 30520 KB Output is correct
7 Correct 119 ms 30424 KB Output is correct
8 Correct 92 ms 30476 KB Output is correct
9 Correct 125 ms 31552 KB Output is correct
10 Correct 92 ms 30024 KB Output is correct
11 Correct 115 ms 30476 KB Output is correct
12 Correct 94 ms 30596 KB Output is correct
13 Correct 126 ms 30536 KB Output is correct
14 Correct 114 ms 31048 KB Output is correct
15 Correct 94 ms 30520 KB Output is correct
16 Correct 119 ms 31564 KB Output is correct
17 Correct 97 ms 31308 KB Output is correct
18 Correct 115 ms 31048 KB Output is correct
19 Correct 102 ms 30612 KB Output is correct
20 Correct 121 ms 31052 KB Output is correct

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 7516 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 KB Output is correct
2 Incorrect 3 ms 7516 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 KB Output is correct
2 Incorrect 3 ms 7516 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 KB Output is correct
2 Incorrect 3 ms 7516 KB Output isn't correct
3 Halted 0 ms 0 KB -