Submission #1164272

#	Time	Username	Problem	Language	Result	Execution time	Memory
1164272		steveonalex	Two Dishes (JOI19_dishes)	C++20	74 / 100	4232 ms	204004 KiB

dishes

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()

ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}

ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ull mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}

//mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }

template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }

template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

const ll INF = 1e18 + 69;

struct SegmentTree{
    struct LazyNode{
        ll add, ma;
        LazyNode(ll add = 0, ll ma = -INF): add(add), ma(ma) {
        }
    };
    int n;
    vector<ll> a;
    vector<LazyNode> lazy;

    SegmentTree(int _n){
        n = _n;
        a.resize(n * 4 + 4);
        lazy.resize(n * 4 + 4);
    }

    void apply(int id, LazyNode val){
        if (val.ma != -INF && val.add != 0) assert(false);
        if (val.ma != -INF){
            a[id] = val.ma;
            lazy[id].ma = val.ma;
            lazy[id].add = 0;
        }
        else{
            a[id] += val.add;
            if (lazy[id].ma != -INF) lazy[id].ma += val.add;
            else lazy[id].add += val.add;
        }
    }

    void down(int id){
        apply(id * 2, lazy[id]);
        apply(id * 2 + 1, lazy[id]);
        lazy[id] = LazyNode();
    }

    void update(int u, int v, LazyNode val, int l, int r, int id){
        if (u <= l && r <= v){
            apply(id, val);
            return;
        }
        down(id);
        int mid = (l + r) >> 1;
        if (u <= mid) update(u, v, val, l, mid, id * 2);
        if (v > mid) update(u, v, val, mid + 1, r, id * 2 + 1);
        a[id] = max(a[id * 2], a[id * 2 + 1]);
    }

    void update_add(int l, int r, ll val){
        update(l, r, LazyNode(val, -INF), 1, n, 1);
    }
    void update_set(int l, int r, ll val){
        update(l, r, LazyNode(0, val), 1, n, 1);
    }

    ll get(int u, int v, int l, int r, int id){
        if (u <= l && r <= v) return a[id];
        down(id);
        int mid = (l + r) >> 1;
        ll ans = -INF;
        if (u <= mid) maximize(ans, get(u, v, l, mid, id * 2));
        if (v > mid) maximize(ans, get(u, v, mid+1, r, id * 2 + 1));
        return ans;
    }

    ll get(int l, int r){
        return get(l, r, 1, n, 1);
    }

    int get_first_pos(int i, ll val, int l, int r, int id){
        if (i < l) return 0;
        if (a[id] < val) return 0;
        if (l == r) return l;
        down(id);
        int mid = (l + r) >> 1;
        int ans = get_first_pos(i, val, mid+1, r, id * 2 + 1);
        if (ans != 0) return ans;
        return get_first_pos(i, val, l, mid, id * 2);
    }

    int get_first_pos(int i, ll val){ // first position to the left of i, such that a[i] >= val
        return get_first_pos(i, val, 1, n, 1);
    }
};


void solve(){
    int n, m; cin >> n >> m;
    vector<ll> a(n+1), s(n+1), p(n+1);
    vector<ll> b(m+1), t(m+1), q(m+1);
    for(int i = 1; i <= n; ++i) cin >> a[i] >> s[i] >> p[i];
    for(int i = 1; i <= m; ++i) cin >> b[i] >> t[i] >> q[i];

    vector<int> r1(n+1), r2(m+1);
    for(int i = 1; i <= n; ++i) a[i] += a[i-1];
    for(int i = 1; i <= m; ++i) b[i] += b[i-1];

    for(int i = 1; i <= n; ++i){
        r1[i] = upper_bound(ALL(b), s[i] - a[i]) - b.begin();
    }
    for(int i = 1; i <= m; ++i){
        r2[i] = upper_bound(ALL(a), t[i] - b[i]) - a.begin();
    }

    vector<vector<int>> pos(m+2);
    for(int i = 1; i <= n; ++i) pos[r1[i]].push_back(i);

    SegmentTree st(n+2);
    vector<int> S;
    for(int i = m; i >= 0; --i){
        for(int j: pos[i+1]){
            st.update_add(j+1, n+1, p[j]);
            S.push_back(j+1);
        }

//        for(int j = 1; j <= n+1; ++j) st.get(j, j);

        remove_dup(S);

        for(int j: S) {
            ll val = st.get(j, j);
            int k = st.get_first_pos(j-1, val);
            st.update_set(k+1, j, val);
        }
        S.clear();


        if (r2[i] > 0){
            st.update_add(1, r2[i], q[i]);
            S.push_back(r2[i] + 1);
        }
    }
    ll ans = st.get(1, n+1);
    cout << ans << "\n";
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    clock_t start = clock();

    solve();

    cerr << "Time elapsed: " << clock() - start << "ms!\n";
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 3 / 3
• Subtask 3: 7 / 7
• Subtask 4: 39 / 39
• Subtask 5: 11 / 11
• Subtask 6: 9 / 9
• Subtask 7: 0 / 17
• Subtask 8: 0 / 9