Submission #1122613

#	Time	Username	Problem	Language	Result	Execution time	Memory
1122613		steveonalex	Growing Trees (BOI11_grow)	C++17	100 / 100	48 ms	1608 KiB

grow

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define MASK(i) (1LL << (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 LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return __lg(mask);}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
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"){
        for(auto item: container) cout << item << separator;
        cout << finish;
    }


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

struct FenwickTree{
    int n;
    vector<int> a;

    FenwickTree(int _n){
        n = _n;
        a.resize(n+1);
    }

    void update(int i, int v){
        while(i <= n){
            a[i] += v;
            i += LASTBIT(i);
        }
    }

    int get(int i){
        int ans = 0;
        while(i > 0){
            ans += a[i];
            i -= LASTBIT(i);
        }
        return ans;
    }

    int binary_lift(int v){
        int idx = 0, p = MASK(logOf(n));
        while(p > 0){
            if (idx + p <= n && v - a[idx + p] > 0){
                idx += p;
                v -= a[idx];
            }
            p >>= 1;
        }
        return idx + 1;
    }
};


void solve(){
    int n, q; cin >> n >> q;
    vector<int> a(n+1);
    for(int i = 1; i<=n; ++i) cin >> a[i];

    sort(ALL(a));
    
    FenwickTree bit(n);
    for(int i = 1; i <= n; ++i) bit.update(i, a[i] - a[i-1]);

    while(q--){
        char type; cin >> type;
        if (type == 'F'){
            int c, h; cin >> c >> h;
            int idx1 = bit.binary_lift(h);
            if (idx1 + c > n) bit.update(idx1, 1);
            else{
                int cu = bit.get(idx1 + c);
                int idx2 = bit.binary_lift(cu), idx3 = bit.binary_lift(cu + 1);
                bit.update(idx1, 1); bit.update(idx2, -1);
                c -= idx2 - idx1;
                bit.update(idx3 - c, 1); bit.update(idx3, -1);
            }
        }
        if (type == 'C'){
            int l, r; cin >> l >> r;
            cout << bit.binary_lift(r + 1) - bit.binary_lift(l) << "\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: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10