Submission #546857

#	Time	Username	Problem	Language	Result	Execution time	Memory
546857		ddy888	Sterilizing Spray (JOI15_sterilizing)	C++17	100 / 100	250 ms	16364 KiB

sterilizing

#undef _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
void debug_out() {cerr<<endl;}
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {cerr<<" "<<to_string(H);debug_out(T...);}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:",debug_out(__VA_ARGS__)
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define int long long 
#define pb push_back
#define fi first
#define si second
typedef pair<int,int> pi;
typedef vector<int> vi;
typedef tuple<int,int,int> ti;  
template<typename T> bool chmin(T &a, T b) {return (b < a) ? a = b, 1 : 0;}
template<typename T> bool chmax(T &a, T b) {return (b > a) ? a = b, 1 : 0;}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int N, Q, K;
int C[100010];

struct node { 
    int s,e,m,val;
    node *l, *r;
    node(int _s, int _e) {
        s = _s, e = _e, m = (s+e)>>1ll;
        val = 0;
        if (s != e) {
            l = new node(s,m);
            r = new node(m+1,e);
        }
    }
    void set(int x, int nv) {
        if (s == e) {
            val = nv;
            return;
        }
        if (x > m) r->set(x, nv);
        else l->set(x, nv);
        val = l->val + r->val;
    }
    void spray(int qs, int qe) {
        if (K == 1 || val == 0) return;
        if (s == e) {
            val /= K;
            return;
        }
        if (qs > m) r->spray(qs, qe);
        else if (qe <= m) l->spray(qs, qe);
        else l->spray(qs, m), r->spray(m+1, qe);
        val = l->val + r->val;
    }
    int sum(int qs, int qe) {
        if (qs == s && qe == e) return val;
        if (qs > m) return r->sum(qs, qe);
        if (qe <= m) return l->sum(qs, qe);
        return l->sum(qs, m) + r->sum(m+1, qe);
    }
} *seg;

signed main() {
    fast;
    cin >> N >> Q >> K;
    seg = new node(1, N);
    for (int i = 1; i <= N; ++i) {
        cin >> C[i];
        seg->set(i, C[i]);
    }
    while (Q--) {
        int op, x, y; cin >> op >> x >> y;
        if (op == 1) {
            seg->set(x, y);
        } else if (op == 2) {
            seg->spray(x, y);
        } else {
            cout << seg->sum(x, y) << '\n';
        }
    }
    return 0;
}   

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 75 / 75